diff --git a/data/json/recipes/armor/arms.json b/data/json/recipes/armor/arms.json
index c72c97fd65d3e..e8987fdba3ab2 100644
--- a/data/json/recipes/armor/arms.json
+++ b/data/json/recipes/armor/arms.json
@@ -229,7 +229,7 @@
     "time": "120 m",
     "autolearn": true,
     "components": [ [ [ "sheet_metal", 1 ] ], [ [ "cordage_6_leather", 8 ] ] ],
-    "proficiencies": [ { "proficiency": "prof_metalworking" } ],
+    "proficiencies": [ { "proficiency": "prof_metalworking" }, { "proficiency": "prof_case_hardening" } ],
     "qualities": [ { "id": "HAMMER", "level": 2 }, { "id": "SAW_M", "level": 2 }, { "id": "DRILL", "level": 1 } ]
   },
   {
@@ -242,8 +242,9 @@
     "difficulty": 6,
     "time": "4 h",
     "book_learn": [ [ "textbook_armwest", 6 ], [ "welding_book", 6 ] ],
-    "components": [ [ [ "charcoal", 64 ] ], [ [ "armguard_metal", 1 ] ] ],
-    "proficiencies": [ { "proficiency": "prof_metalworking" }, { "proficiency": "prof_blacksmithing" } ],
+	"using": [ "carbon", 3 ],
+    "components": [ [ "armguard_metal", 1 ] ],
+    "proficiencies": [ { "proficiency": "prof_metalworking" }, { "proficiency": "prof_blacksmithing" }, { "proficiency": "prof_case_hardening" } ],
     "qualities": [ { "id": "HAMMER", "level": 2 } ],
     "tools": [ [ [ "forge", 64 ] ], [ [ "metalworking_tongs", -1 ] ] ]
   },
@@ -290,8 +291,9 @@
     "difficulty": 6,
     "time": "3 h",
     "book_learn": [ [ "textbook_armwest", 6 ], [ "welding_book", 6 ] ],
-    "components": [ [ [ "charcoal", 16 ] ], [ [ "armguard_metal_sheets_elbows", 1 ] ] ],
-    "proficiencies": [ { "proficiency": "prof_metalworking" }, { "proficiency": "prof_blacksmithing" } ],
+	"using": [ "carbon", 2 ],
+    "components": [ [ "armguard_metal_sheets_elbows", 1 ] ],
+    "proficiencies": [ { "proficiency": "prof_metalworking" }, { "proficiency": "prof_blacksmithing" }, { "proficiency": "prof_case_hardening" } ],
     "qualities": [ { "id": "HAMMER", "level": 2 } ],
     "tools": [ [ [ "forge", 16 ] ], [ [ "metalworking_tongs", -1 ] ] ]
   },
@@ -320,8 +322,9 @@
     "difficulty": 6,
     "time": "3 h",
     "book_learn": [ [ "textbook_armwest", 6 ], [ "welding_book", 6 ] ],
-    "components": [ [ [ "charcoal", 16 ] ], [ [ "armguard_metal_sheets_shoulders", 1 ] ] ],
-    "proficiencies": [ { "proficiency": "prof_metalworking" }, { "proficiency": "prof_blacksmithing" } ],
+	"using": [ "carbon", 1 ],
+    "components": [ [ "armguard_metal_sheets_shoulders", 1 ] ],
+    "proficiencies": [ { "proficiency": "prof_metalworking" }, { "proficiency": "prof_blacksmithing" }, { "proficiency": "prof_case_hardening" } ],
     "qualities": [ { "id": "HAMMER", "level": 2 } ],
     "tools": [ [ [ "forge", 16 ] ], [ [ "metalworking_tongs", -1 ] ] ]
   },
@@ -975,7 +978,7 @@
       [ "armor_chainmail_assembling", 1 ]
     ],
     "qualities": [ { "id": "CHISEL", "level": 3 } ],
-    "tools": [ [ [ "swage", -1 ] ], [ [ "metal_tank", -1 ] ], [ [ "water", -120 ] ] ],
+    "tools": [ [ [ "tongs", -1 ] ], [ [ "hotcut", -1 ] ], [ [ "metal_tank", -1 ] ], [ [ "water", -120 ] ] ],
     "proficiencies": [
       { "proficiency": "prof_armorsmithing" },
       { "proficiency": "prof_closures", "time_multiplier": 1.25, "fail_multiplier": 1.15 },
@@ -997,7 +1000,7 @@
       [ "armor_chainmail_assembling", 2 ]
     ],
     "qualities": [ { "id": "CHISEL", "level": 3 } ],
-    "tools": [ [ [ "swage", -1 ] ], [ [ "metal_tank", -1 ] ], [ [ "water", -120 ] ] ]
+    "tools": [ [ [ "tongs", -1 ] ], [ [ "hotcut", -1 ] ], [ [ "metal_tank", -1 ] ], [ [ "water", -120 ] ] ]
   },
   {
     "result": "armor_lc_armguard",
@@ -1176,7 +1179,7 @@
       [ "armor_chainmail_assembling", 1 ]
     ],
     "qualities": [ { "id": "CHISEL", "level": 3 } ],
-    "tools": [ [ [ "swage", -1 ] ], [ [ "metal_tank", -1 ] ], [ [ "water", -120 ] ] ],
+    "tools": [ [ [ "tongs", -1 ] ], [ [ "hotcut", -1 ] ], [ [ "metal_tank", -1 ] ], [ [ "water", -120 ] ] ],
     "proficiencies": [
       { "proficiency": "prof_armorsmithing" },
       { "proficiency": "prof_closures", "time_multiplier": 1.25, "fail_multiplier": 1.15 },
@@ -1198,7 +1201,7 @@
       [ "armor_chainmail_assembling", 2 ]
     ],
     "qualities": [ { "id": "CHISEL", "level": 3 } ],
-    "tools": [ [ [ "swage", -1 ] ], [ [ "metal_tank", -1 ] ], [ [ "water", -120 ] ] ]
+    "tools": [ [ [ "tongs", -1 ] ], [ [ "hotcut", -1 ] ], [ [ "metal_tank", -1 ] ], [ [ "water", -120 ] ] ]
   },
   {
     "result": "armor_lc_heavyarmguard",
@@ -1377,7 +1380,7 @@
       [ "armor_chainmail_assembling", 1 ]
     ],
     "qualities": [ { "id": "CHISEL", "level": 3 } ],
-    "tools": [ [ [ "swage", -1 ] ], [ [ "metal_tank", -1 ] ], [ [ "water", -120 ] ] ],
+    "tools": [ [ [ "tongs", -1 ] ], [ [ "hotcut", -1 ] ], [ [ "metal_tank", -1 ] ], [ [ "water", -120 ] ] ],
     "proficiencies": [
       { "proficiency": "prof_armorsmithing" },
       { "proficiency": "prof_closures", "time_multiplier": 1.25, "fail_multiplier": 1.15 },
@@ -1399,6 +1402,6 @@
       [ "armor_chainmail_assembling", 2 ]
     ],
     "qualities": [ { "id": "CHISEL", "level": 3 } ],
-    "tools": [ [ [ "swage", -1 ] ], [ [ "metal_tank", -1 ] ], [ [ "water", -120 ] ] ]
+    "tools": [ [ [ "tongs", -1 ] ], [ [ "hotcut", -1 ] ], [ [ "metal_tank", -1 ] ], [ [ "water", -120 ] ] ]
   }
 ]
diff --git a/data/json/recipes/armor/feet.json b/data/json/recipes/armor/feet.json
index ff8aa795fdfdc..dc92403007409 100644
--- a/data/json/recipes/armor/feet.json
+++ b/data/json/recipes/armor/feet.json
@@ -1335,8 +1335,12 @@
     "difficulty": 6,
     "time": "3 h",
     "book_learn": [ [ "textbook_armwest", 6 ], [ "welding_book", 6 ] ],
-    "components": [ [ [ "charcoal", 16 ] ], [ [ "sabaton_metal_sheets", 1 ] ] ],
-    "proficiencies": [ { "proficiency": "prof_metalworking" }, { "proficiency": "prof_blacksmithing" } ],
+    "using": [ [ "carbon", 2 ], [ "sabaton_metal_sheets", 1 ] ],
+    "proficiencies": [
+      { "proficiency": "prof_metalworking" },
+      { "proficiency": "prof_blacksmithing" },
+      { "proficiency": "prof_case_hardening" }
+    ],
     "qualities": [ { "id": "HAMMER", "level": 2 } ],
     "tools": [ [ [ "forge", 16 ] ], [ [ "metalworking_tongs", -1 ] ] ]
   },
@@ -1434,7 +1438,8 @@
       [ "fabric_leather_fur_hide", 2 ],
       [ "blacksmithing_standard", 16 ],
       [ "lc_steel_standard", 1 ],
-      [ "armor_chainmail_assembling", 1 ]
+      [ "armor_chainmail_assembling", 1 ],
+      [ "carbon", 2 ]
     ],
     "qualities": [ { "id": "CHISEL", "level": 3 } ],
     "tools": [ [ [ "swage", -1 ] ] ],
@@ -1443,7 +1448,8 @@
       { "proficiency": "prof_closures", "time_multiplier": 1.25, "fail_multiplier": 1.15 },
       { "proficiency": "prof_metalworking" },
       { "proficiency": "prof_blacksmithing" },
-      { "proficiency": "prof_leatherworking_basic", "fail_multiplier": 1.15 }
+      { "proficiency": "prof_leatherworking_basic", "fail_multiplier": 1.15 },
+      { "proficiency": "prof_case_hardening" }
     ]
   },
   {
@@ -1455,7 +1461,8 @@
       [ "fabric_leather_fur_hide", 3 ],
       [ "blacksmithing_standard", 22 ],
       [ "lc_steel_standard", 2 ],
-      [ "armor_chainmail_assembling", 2 ]
+      [ "armor_chainmail_assembling", 2 ],
+      [ "carbon", 3 ]
     ],
     "qualities": [ { "id": "CHISEL", "level": 3 } ],
     "tools": [ [ [ "swage", -1 ] ] ]
@@ -1477,13 +1484,14 @@
       [ "armor_chainmail_assembling", 1 ]
     ],
     "qualities": [ { "id": "CHISEL", "level": 3 } ],
-    "tools": [ [ [ "swage", -1 ] ], [ [ "metal_tank", -1 ] ], [ [ "water", -120 ] ] ],
+    "tools": [ [ [ "tongs", -1 ] ], [ [ "hotcut", -1 ] ], [ [ "metal_tank", -1 ] ], [ [ "water", -120 ] ] ],
     "proficiencies": [
       { "proficiency": "prof_armorsmithing" },
       { "proficiency": "prof_closures", "time_multiplier": 1.25, "fail_multiplier": 1.15 },
       { "proficiency": "prof_metalworking" },
       { "proficiency": "prof_blacksmithing" },
-      { "proficiency": "prof_leatherworking_basic", "fail_multiplier": 1.15 }
+      { "proficiency": "prof_leatherworking_basic", "fail_multiplier": 1.15 },
+      { "proficiency": "prof_quenching" }
     ]
   },
   {
@@ -1498,6 +1506,6 @@
       [ "armor_chainmail_assembling", 2 ]
     ],
     "qualities": [ { "id": "CHISEL", "level": 3 } ],
-    "tools": [ [ [ "swage", -1 ] ], [ [ "metal_tank", -1 ] ], [ [ "water", -120 ] ] ]
+    "tools": [ [ [ "tongs", -1 ] ], [ [ "hotcut", -1 ] ], [ [ "metal_tank", -1 ] ], [ [ "water", -120 ] ] ]
   }
 ]
diff --git a/data/json/recipes/armor/hands.json b/data/json/recipes/armor/hands.json
index 9b7cb5000142f..cf0fa24d5617a 100644
--- a/data/json/recipes/armor/hands.json
+++ b/data/json/recipes/armor/hands.json
@@ -1211,7 +1211,8 @@
       [ "fabric_leather_fur_hide", 1 ],
       [ "blacksmithing_standard", 16 ],
       [ "lc_steel_standard", 2 ],
-      [ "armor_chainmail_assembling", 1 ]
+      [ "armor_chainmail_assembling", 1 ],
+      [ "carbon", 2 ]
     ],
     "qualities": [ { "id": "CHISEL", "level": 3 } ],
     "tools": [ [ [ "swage", -1 ] ] ],
@@ -1220,7 +1221,8 @@
       { "proficiency": "prof_closures", "time_multiplier": 1.25, "fail_multiplier": 1.15 },
       { "proficiency": "prof_metalworking" },
       { "proficiency": "prof_blacksmithing" },
-      { "proficiency": "prof_leatherworking_basic", "fail_multiplier": 1.15 }
+      { "proficiency": "prof_leatherworking_basic", "fail_multiplier": 1.15 },
+      { "proficiency": "prof_case_hardening" }
     ]
   },
   {
@@ -1232,7 +1234,8 @@
       [ "fabric_leather_fur_hide", 2 ],
       [ "blacksmithing_standard", 22 ],
       [ "lc_steel_standard", 3 ],
-      [ "armor_chainmail_assembling", 2 ]
+      [ "armor_chainmail_assembling", 2 ],
+      [ "carbon", 3 ]
     ],
     "qualities": [ { "id": "CHISEL", "level": 3 } ],
     "tools": [ [ [ "swage", -1 ] ] ]
@@ -1254,13 +1257,14 @@
       [ "armor_chainmail_assembling", 1 ]
     ],
     "qualities": [ { "id": "CHISEL", "level": 3 } ],
-    "tools": [ [ [ "swage", -1 ] ], [ [ "metal_tank", -1 ] ], [ [ "water", -120 ] ] ],
+    "tools": [ [ [ "tongs", -1 ] ], [ [ "hotcut", -1 ] ], [ [ "metal_tank", -1 ] ], [ [ "water", -120 ] ] ],
     "proficiencies": [
       { "proficiency": "prof_armorsmithing" },
       { "proficiency": "prof_closures", "time_multiplier": 1.25, "fail_multiplier": 1.15 },
       { "proficiency": "prof_metalworking" },
       { "proficiency": "prof_blacksmithing" },
-      { "proficiency": "prof_leatherworking_basic", "fail_multiplier": 1.15 }
+      { "proficiency": "prof_leatherworking_basic", "fail_multiplier": 1.15 },
+      { "proficiency": "prof_quenching" }
     ]
   },
   {
@@ -1275,7 +1279,7 @@
       [ "armor_chainmail_assembling", 2 ]
     ],
     "qualities": [ { "id": "CHISEL", "level": 3 } ],
-    "tools": [ [ [ "swage", -1 ] ], [ [ "metal_tank", -1 ] ], [ [ "water", -120 ] ] ]
+    "tools": [ [ [ "tongs", -1 ] ], [ [ "hotcut", -1 ] ], [ [ "metal_tank", -1 ] ], [ [ "water", -120 ] ] ]
   },
   {
     "result": "lc_mitten_gaunt",
@@ -1342,8 +1346,13 @@
     "difficulty": 6,
     "time": "3 h",
     "book_learn": [ [ "textbook_armwest", 6 ], [ "welding_book", 6 ] ],
-    "components": [ [ [ "charcoal", 16 ] ], [ [ "mitten_gaunt_metal_sheets", 1 ] ] ],
-    "proficiencies": [ { "proficiency": "prof_metalworking" }, { "proficiency": "prof_blacksmithing" } ],
+    "using": [ "carbon", 2 ],
+    "components": [ [ "mitten_gaunt_metal_sheets", 1 ] ],
+    "proficiencies": [
+      { "proficiency": "prof_metalworking" },
+      { "proficiency": "prof_blacksmithing" },
+      { "proficiency": "prof_case_hardening" }
+    ],
     "qualities": [ { "id": "HAMMER", "level": 2 } ],
     "tools": [ [ [ "forge", 16 ] ], [ [ "metalworking_tongs", -1 ] ] ]
   },
@@ -1441,7 +1450,8 @@
       [ "fabric_leather_fur_hide", 1 ],
       [ "blacksmithing_standard", 16 ],
       [ "lc_steel_standard", 3 ],
-      [ "armor_chainmail_assembling", 1 ]
+      [ "armor_chainmail_assembling", 1 ],
+      [ "carbon", 2 ]
     ],
     "qualities": [ { "id": "CHISEL", "level": 3 } ],
     "tools": [ [ [ "swage", -1 ] ] ],
@@ -1450,7 +1460,8 @@
       { "proficiency": "prof_closures", "time_multiplier": 1.25, "fail_multiplier": 1.15 },
       { "proficiency": "prof_metalworking" },
       { "proficiency": "prof_blacksmithing" },
-      { "proficiency": "prof_leatherworking_basic", "fail_multiplier": 1.15 }
+      { "proficiency": "prof_leatherworking_basic", "fail_multiplier": 1.15 },
+      { "proficiency": "prof_case_hardening" }
     ]
   },
   {
@@ -1462,7 +1473,8 @@
       [ "fabric_leather_fur_hide", 2 ],
       [ "blacksmithing_standard", 22 ],
       [ "lc_steel_standard", 4 ],
-      [ "armor_chainmail_assembling", 2 ]
+      [ "armor_chainmail_assembling", 2 ],
+      [ "carbon", 3 ]
     ],
     "qualities": [ { "id": "CHISEL", "level": 3 } ],
     "tools": [ [ [ "swage", -1 ] ] ]
@@ -1484,13 +1496,14 @@
       [ "armor_chainmail_assembling", 1 ]
     ],
     "qualities": [ { "id": "CHISEL", "level": 3 } ],
-    "tools": [ [ [ "swage", -1 ] ], [ [ "metal_tank", -1 ] ], [ [ "water", -120 ] ] ],
+    "tools": [ [ [ "tongs", -1 ] ], [ [ "hotcut", -1 ] ], [ [ "metal_tank", -1 ] ], [ [ "water", -120 ] ] ],
     "proficiencies": [
       { "proficiency": "prof_armorsmithing" },
       { "proficiency": "prof_closures", "time_multiplier": 1.25, "fail_multiplier": 1.15 },
       { "proficiency": "prof_metalworking" },
       { "proficiency": "prof_blacksmithing" },
-      { "proficiency": "prof_leatherworking_basic", "fail_multiplier": 1.15 }
+      { "proficiency": "prof_leatherworking_basic", "fail_multiplier": 1.15 },
+      { "proficiency": "prof_quenching" }
     ]
   },
   {
@@ -1505,6 +1518,6 @@
       [ "armor_chainmail_assembling", 2 ]
     ],
     "qualities": [ { "id": "CHISEL", "level": 3 } ],
-    "tools": [ [ [ "swage", -1 ] ], [ [ "metal_tank", -1 ] ], [ [ "water", -120 ] ] ]
+    "tools": [ [ [ "tongs", -1 ] ], [ [ "hotcut", -1 ] ], [ [ "metal_tank", -1 ] ], [ [ "water", -120 ] ] ]
   }
 ]
diff --git a/data/json/recipes/armor/head.json b/data/json/recipes/armor/head.json
index a25195934c232..37b0439e04250 100644
--- a/data/json/recipes/armor/head.json
+++ b/data/json/recipes/armor/head.json
@@ -909,8 +909,9 @@
     "difficulty": 6,
     "time": "4 h",
     "book_learn": [ [ "textbook_armwest", 6 ], [ "welding_book", 6 ] ],
-    "components": [ [ [ "charcoal", 64 ] ], [ [ "helmet_metal_sheets_full", 1 ] ] ],
-    "proficiencies": [ { "proficiency": "prof_metalworking" }, { "proficiency": "prof_blacksmithing" } ],
+	"using": [ "carbon", 3 ],
+    "components": [ [ "helmet_metal_sheets_full", 1 ] ],
+    "proficiencies": [ { "proficiency": "prof_metalworking" }, { "proficiency": "prof_blacksmithing" }, { "proficiency": "prof_case_hardening" } ],
     "qualities": [ { "id": "HAMMER", "level": 2 } ],
     "tools": [ [ [ "forge", 64 ] ], [ [ "metalworking_tongs", -1 ] ] ]
   },
@@ -939,8 +940,9 @@
     "difficulty": 6,
     "time": "4 h",
     "book_learn": [ [ "textbook_armwest", 6 ], [ "welding_book", 6 ] ],
-    "components": [ [ [ "charcoal", 64 ] ], [ [ "helmet_metal_sheets", 1 ] ] ],
-    "proficiencies": [ { "proficiency": "prof_metalworking" }, { "proficiency": "prof_blacksmithing" } ],
+	"using": [ "carbon", 3 ],
+    "components": [ [ "helmet_metal_sheets", 1 ] ],
+    "proficiencies": [ { "proficiency": "prof_metalworking" }, { "proficiency": "prof_blacksmithing" }, { "proficiency": "prof_case_hardening" } ],
     "qualities": [ { "id": "HAMMER", "level": 2 } ],
     "tools": [ [ [ "forge", 64 ] ], [ [ "metalworking_tongs", -1 ] ] ]
   },
@@ -2731,7 +2733,7 @@
     "difficulty": 8,
     "time": "5 d 12 h",
     "book_learn": [ [ "textbook_armwest", 7 ] ],
-    "using": [ [ "fabric_leather_fur_hide", 1 ], [ "blacksmithing_standard", 16 ], [ "lc_steel_standard", 2 ] ],
+    "using": [ [ "fabric_leather_fur_hide", 1 ], [ "blacksmithing_standard", 16 ], [ "lc_steel_standard", 2 ], [ "carbon", 2 ],
     "qualities": [ { "id": "CHISEL", "level": 3 } ],
     "tools": [ [ [ "swage", -1 ] ] ],
     "proficiencies": [
@@ -2739,7 +2741,7 @@
       { "proficiency": "prof_closures", "time_multiplier": 1.25, "fail_multiplier": 1.15 },
       { "proficiency": "prof_metalworking" },
       { "proficiency": "prof_blacksmithing" },
-      { "proficiency": "prof_leatherworking_basic", "fail_multiplier": 1.15 }
+      { "proficiency": "prof_leatherworking_basic", "fail_multiplier": 1.15 }, { "proficiency": "prof_case_hardening" }
     ]
   },
   {
@@ -2747,7 +2749,7 @@
     "type": "recipe",
     "copy-from": "ch_helm_close",
     "time": "6 d 8 h",
-    "using": [ [ "fabric_leather_fur_hide", 2 ], [ "blacksmithing_standard", 22 ], [ "lc_steel_standard", 3 ] ],
+    "using": [ [ "fabric_leather_fur_hide", 2 ], [ "blacksmithing_standard", 22 ], [ "lc_steel_standard", 3 ], [ "carbon", 3 ] ],
     "qualities": [ { "id": "CHISEL", "level": 3 } ],
     "tools": [ [ [ "swage", -1 ] ] ]
   },
@@ -2763,13 +2765,14 @@
     "book_learn": [ [ "textbook_armwest", 7 ] ],
     "using": [ [ "fabric_leather_fur_hide", 1 ], [ "blacksmithing_standard", 16 ], [ "mc_steel_standard", 2 ] ],
     "qualities": [ { "id": "CHISEL", "level": 3 } ],
-    "tools": [ [ [ "swage", -1 ] ], [ [ "metal_tank", -1 ] ], [ [ "water", -120 ] ] ],
+    "tools": [ [ [ "tongs", -1 ] ], [ [ "hotcut", -1 ] ], [ [ "metal_tank", -1 ] ], [ [ "water", -120 ] ] ],
     "proficiencies": [
       { "proficiency": "prof_armorsmithing" },
       { "proficiency": "prof_closures", "time_multiplier": 1.25, "fail_multiplier": 1.15 },
       { "proficiency": "prof_metalworking" },
       { "proficiency": "prof_blacksmithing" },
-      { "proficiency": "prof_leatherworking_basic", "fail_multiplier": 1.15 }
+      { "proficiency": "prof_leatherworking_basic", "fail_multiplier": 1.15 },
+      { "proficiency": "prof_quenching" }
     ]
   },
   {
@@ -2779,6 +2782,6 @@
     "time": "6 d 12 h",
     "using": [ [ "fabric_leather_fur_hide", 2 ], [ "blacksmithing_standard", 22 ], [ "mc_steel_standard", 3 ] ],
     "qualities": [ { "id": "CHISEL", "level": 3 } ],
-    "tools": [ [ [ "swage", -1 ] ], [ [ "metal_tank", -1 ] ], [ [ "water", -120 ] ] ]
+    "tools": [ [ [ "tongs", -1 ] ], [ [ "hotcut", -1 ] ], [ [ "metal_tank", -1 ] ], [ [ "water", -120 ] ] ]
   }
 ]
diff --git a/data/json/recipes/armor/legs.json b/data/json/recipes/armor/legs.json
index b3bfc9aed6061..8c42dd9e48ecc 100644
--- a/data/json/recipes/armor/legs.json
+++ b/data/json/recipes/armor/legs.json
@@ -466,8 +466,13 @@
     "difficulty": 6,
     "time": "4 h",
     "book_learn": [ [ "textbook_armwest", 6 ], [ "welding_book", 6 ] ],
-    "components": [ [ [ "charcoal", 64 ] ], [ [ "legguard_metal_sheets", 1 ] ] ],
-    "proficiencies": [ { "proficiency": "prof_metalworking" }, { "proficiency": "prof_blacksmithing" } ],
+    "using": [ "carbon", 3 ],
+    "components": [ [ "legguard_metal_sheets", 1 ] ],
+    "proficiencies": [
+      { "proficiency": "prof_metalworking" },
+      { "proficiency": "prof_blacksmithing" },
+      { "proficiency": "prof_case_hardening" }
+    ],
     "qualities": [ { "id": "HAMMER", "level": 2 } ],
     "tools": [ [ [ "forge", 64 ] ], [ [ "metalworking_tongs", -1 ] ] ]
   },
@@ -496,8 +501,13 @@
     "difficulty": 6,
     "time": "3 h",
     "book_learn": [ [ "textbook_armwest", 6 ], [ "welding_book", 6 ] ],
-    "components": [ [ [ "charcoal", 16 ] ], [ [ "legguard_metal_sheets_knees", 1 ] ] ],
-    "proficiencies": [ { "proficiency": "prof_metalworking" }, { "proficiency": "prof_blacksmithing" } ],
+    "using": [ "carbon", 1 ],
+    "components": [ [ "legguard_metal_sheets_knees", 1 ] ],
+    "proficiencies": [
+      { "proficiency": "prof_metalworking" },
+      { "proficiency": "prof_blacksmithing" },
+      { "proficiency": "prof_case_hardening" }
+    ],
     "qualities": [ { "id": "HAMMER", "level": 2 } ],
     "tools": [ [ [ "forge", 16 ] ], [ [ "metalworking_tongs", -1 ] ] ]
   },
@@ -526,8 +536,13 @@
     "difficulty": 6,
     "time": "4 h",
     "book_learn": [ [ "textbook_armwest", 6 ], [ "welding_book", 6 ] ],
-    "components": [ [ [ "charcoal", 64 ] ], [ [ "legguard_metal_sheets_hip", 1 ] ] ],
-    "proficiencies": [ { "proficiency": "prof_metalworking" }, { "proficiency": "prof_blacksmithing" } ],
+    "using": [ "carbon", 3 ],
+    "components": [ [ "legguard_metal_sheets_hip", 1 ] ],
+    "proficiencies": [
+      { "proficiency": "prof_metalworking" },
+      { "proficiency": "prof_blacksmithing" },
+      { "proficiency": "prof_case_hardening" }
+    ],
     "qualities": [ { "id": "HAMMER", "level": 2 } ],
     "tools": [ [ [ "forge", 64 ] ], [ [ "metalworking_tongs", -1 ] ] ]
   },
@@ -1434,7 +1449,7 @@
     "book_learn": [ [ "textbook_armwest", 7 ] ],
     "using": [ [ "fabric_leather_fur_hide", 1 ], [ "blacksmithing_standard", 16 ], [ "mc_steel_standard", 2 ] ],
     "qualities": [ { "id": "CHISEL", "level": 3 } ],
-    "tools": [ [ [ "swage", -1 ] ], [ [ "metal_tank", -1 ] ], [ [ "water", -120 ] ] ],
+    "tools": [ [ [ "tongs", -1 ] ], [ [ "hotcut", -1 ] ], [ [ "metal_tank", -1 ] ], [ [ "water", -120 ] ] ],
     "proficiencies": [
       { "proficiency": "prof_armorsmithing" },
       { "proficiency": "prof_closures", "time_multiplier": 1.25, "fail_multiplier": 1.15 },
@@ -1451,7 +1466,7 @@
     "time": "8 d 10 h 43 m",
     "using": [ [ "fabric_leather_fur_hide", 2 ], [ "blacksmithing_standard", 22 ], [ "mc_steel_standard", 3 ] ],
     "qualities": [ { "id": "CHISEL", "level": 3 } ],
-    "tools": [ [ [ "swage", -1 ] ], [ [ "metal_tank", -1 ] ], [ [ "water", -120 ] ] ]
+    "tools": [ [ [ "tongs", -1 ] ], [ [ "hotcut", -1 ] ], [ [ "metal_tank", -1 ] ], [ [ "water", -120 ] ] ]
   },
   {
     "result": "armor_lc_leg_guard",
@@ -1585,7 +1600,7 @@
     "book_learn": [ [ "textbook_armwest", 7 ] ],
     "using": [ [ "fabric_leather_fur_hide", 1 ], [ "blacksmithing_standard", 16 ], [ "mc_steel_standard", 3 ] ],
     "qualities": [ { "id": "CHISEL", "level": 3 } ],
-    "tools": [ [ [ "swage", -1 ] ], [ [ "metal_tank", -1 ] ], [ [ "water", -120 ] ] ],
+    "tools": [ [ [ "tongs", -1 ] ], [ [ "hotcut", -1 ] ], [ [ "metal_tank", -1 ] ], [ [ "water", -120 ] ] ],
     "proficiencies": [
       { "proficiency": "prof_armorsmithing" },
       { "proficiency": "prof_closures", "time_multiplier": 1.25, "fail_multiplier": 1.15 },
@@ -1602,7 +1617,7 @@
     "time": "9 d 6 h 59 m",
     "using": [ [ "fabric_leather_fur_hide", 2 ], [ "blacksmithing_standard", 22 ], [ "mc_steel_standard", 4 ] ],
     "qualities": [ { "id": "CHISEL", "level": 3 } ],
-    "tools": [ [ [ "swage", -1 ] ], [ [ "metal_tank", -1 ] ], [ [ "water", -120 ] ] ]
+    "tools": [ [ [ "tongs", -1 ] ], [ [ "hotcut", -1 ] ], [ [ "metal_tank", -1 ] ], [ [ "water", -120 ] ] ]
   },
   {
     "result": "armor_lc_heavy_leg_guard",
@@ -1736,7 +1751,7 @@
     "book_learn": [ [ "textbook_armwest", 7 ] ],
     "using": [ [ "fabric_leather_fur_hide", 1 ], [ "blacksmithing_standard", 16 ], [ "mc_steel_standard", 4 ] ],
     "qualities": [ { "id": "CHISEL", "level": 3 } ],
-    "tools": [ [ [ "swage", -1 ] ], [ [ "metal_tank", -1 ] ], [ [ "water", -120 ] ] ],
+    "tools": [ [ [ "tongs", -1 ] ], [ [ "hotcut", -1 ] ], [ [ "metal_tank", -1 ] ], [ [ "water", -120 ] ] ],
     "proficiencies": [
       { "proficiency": "prof_armorsmithing" },
       { "proficiency": "prof_closures", "time_multiplier": 1.25, "fail_multiplier": 1.15 },
@@ -1753,6 +1768,6 @@
     "time": "10 d 3 h 15 m",
     "using": [ [ "fabric_leather_fur_hide", 2 ], [ "blacksmithing_standard", 22 ], [ "mc_steel_standard", 5 ] ],
     "qualities": [ { "id": "CHISEL", "level": 3 } ],
-    "tools": [ [ [ "swage", -1 ] ], [ [ "metal_tank", -1 ] ], [ [ "water", -120 ] ] ]
+    "tools": [ [ [ "tongs", -1 ] ], [ [ "hotcut", -1 ] ], [ [ "metal_tank", -1 ] ], [ [ "water", -120 ] ] ]
   }
 ]
diff --git a/data/json/recipes/armor/suit.json b/data/json/recipes/armor/suit.json
index 9befe0c7ad57b..d0d128e551839 100644
--- a/data/json/recipes/armor/suit.json
+++ b/data/json/recipes/armor/suit.json
@@ -521,8 +521,13 @@
     "difficulty": 6,
     "time": "12 h",
     "book_learn": [ [ "textbook_armwest", 6 ], [ "welding_book", 6 ] ],
-    "components": [ [ [ "charcoal", 256 ] ], [ [ "armor_metal_sheets", 1 ] ] ],
-    "proficiencies": [ { "proficiency": "prof_metalworking" }, { "proficiency": "prof_blacksmithing" } ],
+    "using": [ "carbon", 10 ],
+    "components": [ [ "armor_metal_sheets", 1 ] ],
+    "proficiencies": [
+      { "proficiency": "prof_metalworking" },
+      { "proficiency": "prof_blacksmithing" },
+      { "proficiency": "prof_case_hardening" }
+    ],
     "qualities": [ { "id": "HAMMER", "level": 2 } ],
     "tools": [ [ [ "forge", 256 ] ], [ [ "metalworking_tongs", -1 ] ] ]
   },
@@ -579,9 +584,14 @@
     "skill_used": "fabrication",
     "difficulty": 6,
     "time": "14 h",
+    "using": [ "carbon", 8 ],
     "book_learn": [ [ "textbook_armwest", 6 ], [ "welding_book", 6 ] ],
-    "components": [ [ [ "charcoal", 312 ] ], [ [ "armor_metal_sheets_heavy", 1 ] ] ],
-    "proficiencies": [ { "proficiency": "prof_metalworking" }, { "proficiency": "prof_blacksmithing" } ],
+    "components": [ [ "armor_metal_sheets_heavy", 1 ] ],
+    "proficiencies": [
+      { "proficiency": "prof_metalworking" },
+      { "proficiency": "prof_blacksmithing" },
+      { "proficiency": "prof_case_hardening" }
+    ],
     "qualities": [ { "id": "HAMMER", "level": 2 } ],
     "tools": [ [ [ "forge", 312 ] ], [ [ "metalworking_tongs", -1 ] ] ]
   },
@@ -655,7 +665,8 @@
     "difficulty": 6,
     "time": "16 h",
     "book_learn": [ [ "textbook_armwest", 6 ], [ "welding_book", 6 ] ],
-    "components": [ [ [ "charcoal", 256 ] ], [ [ "armor_metal_sheets_chain", 1 ] ] ],
+    "using": [ "carbon", 10 ],
+    "components": [ [ "armor_metal_sheets_chain", 1 ] ],
     "proficiencies": [ { "proficiency": "prof_metalworking" }, { "proficiency": "prof_blacksmithing" } ],
     "qualities": [ { "id": "HAMMER", "level": 2 } ],
     "tools": [ [ [ "forge", 256 ] ], [ [ "metalworking_tongs", -1 ] ] ]
@@ -670,7 +681,8 @@
     "difficulty": 6,
     "time": "16 h",
     "book_learn": [ [ "textbook_armwest", 6 ], [ "welding_book", 6 ] ],
-    "components": [ [ [ "charcoal", 312 ] ], [ [ "armor_metal_sheets_chain_heavy", 1 ] ] ],
+    "using": [ "carbon", 8 ],
+    "components": [ [ "armor_metal_sheets_chain_heavy", 1 ] ],
     "proficiencies": [ { "proficiency": "prof_metalworking" }, { "proficiency": "prof_blacksmithing" } ],
     "qualities": [ { "id": "HAMMER", "level": 2 } ],
     "tools": [ [ [ "forge", 312 ] ], [ [ "metalworking_tongs", -1 ] ] ]
@@ -2370,7 +2382,7 @@
     "difficulty": 6,
     "time": "39 d 14 h 24 m",
     "book_learn": [ [ "textbook_armwest", 7 ] ],
-    "using": [ [ "blacksmithing_standard", 80 ], [ "lc_steel_standard", 20 ], [ "tailoring_leather_patchwork", 3 ] ],
+    "using": [ [ "blacksmithing_standard", 80 ], [ "lc_steel_standard", 20 ], [ "tailoring_leather_patchwork", 3 ], [ "carbon", 5 ] ],
     "qualities": [ { "id": "CHISEL", "level": 3 } ],
     "proficiencies": [
       { "proficiency": "prof_leatherworking_basic", "fail_multiplier": 1.15, "time_multiplier": 1.1 },
@@ -2378,18 +2390,24 @@
       { "proficiency": "prof_metalworking" },
       { "proficiency": "prof_blacksmithing" },
       { "proficiency": "prof_armorsmithing" },
-      { "proficiency": "prof_articulation" }
+      { "proficiency": "prof_articulation" },
+      { "proficiency": "prof_case_hardening" }
     ],
-    "tools": [ [ [ "swage", -1 ] ], [ [ "metal_tank", -1 ] ], [ [ "charcoal", 150 ] ] ]
+    "tools": [ [ [ "swage", -1 ] ], [ [ "metal_tank", -1 ] ] ]
   },
   {
     "result": "xl_armor_ch_lightplate",
     "type": "recipe",
     "copy-from": "armor_ch_lightplate",
     "time": "44 d 17 h 57 m",
-    "using": [ [ "blacksmithing_standard", 110 ], [ "lc_steel_standard", 32 ], [ "tailoring_leather_patchwork", 5 ] ],
+    "using": [
+      [ "blacksmithing_standard", 110 ],
+      [ "lc_steel_standard", 32 ],
+      [ "tailoring_leather_patchwork", 5 ],
+      [ "carbon", 7 ]
+    ],
     "qualities": [ { "id": "CHISEL", "level": 3 } ],
-    "tools": [ [ [ "swage", -1 ] ], [ [ "metal_tank", -1 ] ], [ [ "charcoal", 150 ] ] ]
+    "tools": [ [ [ "swage", -1 ] ], [ [ "metal_tank", -1 ] ] ]
   },
   {
     "result": "armor_ch_lightplate",
@@ -2456,7 +2474,7 @@
       { "proficiency": "prof_articulation" },
       { "proficiency": "prof_quenching", "fail_multiplier": 2 }
     ],
-    "tools": [ [ [ "swage", -1 ] ], [ [ "metal_tank", -1 ] ], [ [ "water", -240 ] ] ]
+    "tools": [ [ [ "tongs", -1 ] ], [ [ "hotcut", -1 ] ], [ [ "metal_tank", -1 ] ], [ [ "water", -240 ] ] ]
   },
   {
     "result": "xl_armor_qt_lightplate",
@@ -2465,7 +2483,7 @@
     "time": "46 d 18 h 46 m",
     "using": [ [ "blacksmithing_standard", 110 ], [ "mc_steel_standard", 32 ], [ "tailoring_leather_patchwork", 5 ] ],
     "qualities": [ { "id": "CHISEL", "level": 3 } ],
-    "tools": [ [ [ "swage", -1 ] ], [ [ "metal_tank", -1 ] ], [ [ "water", -240 ] ] ]
+    "tools": [ [ [ "tongs", -1 ] ], [ [ "hotcut", -1 ] ], [ [ "metal_tank", -1 ] ], [ [ "water", -240 ] ] ]
   },
   {
     "result": "armor_qt_lightplate",
@@ -2734,7 +2752,7 @@
     "difficulty": 7,
     "time": "43 d 13 h",
     "book_learn": [ [ "textbook_armwest", 7 ] ],
-    "using": [ [ "blacksmithing_standard", 96 ], [ "lc_steel_standard", 25 ], [ "tailoring_leather_patchwork", 3 ] ],
+    "using": [ [ "blacksmithing_standard", 96 ], [ "lc_steel_standard", 25 ], [ "tailoring_leather_patchwork", 3 ], [ "carbon", 5 ] ],
     "qualities": [ { "id": "CHISEL", "level": 3 } ],
     "proficiencies": [
       { "proficiency": "prof_leatherworking_basic", "fail_multiplier": 1.15, "time_multiplier": 1.1 },
@@ -2742,7 +2760,8 @@
       { "proficiency": "prof_metalworking" },
       { "proficiency": "prof_blacksmithing" },
       { "proficiency": "prof_armorsmithing" },
-      { "proficiency": "prof_articulation" }
+      { "proficiency": "prof_articulation" },
+      { "proficiency": "prof_case_hardening" }
     ],
     "tools": [ [ [ "swage", -1 ] ] ]
   },
@@ -2751,7 +2770,12 @@
     "type": "recipe",
     "copy-from": "armor_ch_plate",
     "time": "49 d 5 h 20 m",
-    "using": [ [ "blacksmithing_standard", 110 ], [ "lc_steel_standard", 39 ], [ "tailoring_leather_patchwork", 5 ] ],
+    "using": [
+      [ "blacksmithing_standard", 110 ],
+      [ "lc_steel_standard", 39 ],
+      [ "tailoring_leather_patchwork", 5 ],
+      [ "carbon", 7 ]
+    ],
     "qualities": [ { "id": "CHISEL", "level": 3 } ],
     "tools": [ [ [ "swage", -1 ] ] ]
   },
@@ -2815,7 +2839,7 @@
       { "proficiency": "prof_armorsmithing" },
       { "proficiency": "prof_articulation" }
     ],
-    "tools": [ [ [ "swage", -1 ] ] ]
+    "tools": [ [ [ "tongs", -1 ] ], [ [ "hotcut", -1 ] ], [ [ "metal_tank", -1 ] ], [ [ "water", -240 ] ] ]
   },
   {
     "result": "xl_armor_qt_plate",
@@ -2824,7 +2848,7 @@
     "time": "51 d 11 h 2 m",
     "using": [ [ "blacksmithing_standard", 110 ], [ "mc_steel_standard", 39 ], [ "tailoring_leather_patchwork", 5 ] ],
     "qualities": [ { "id": "CHISEL", "level": 3 } ],
-    "tools": [ [ [ "swage", -1 ] ] ]
+    "tools": [ [ [ "tongs", -1 ] ], [ [ "hotcut", -1 ] ], [ [ "metal_tank", -1 ] ], [ [ "water", -240 ] ] ]
   },
   {
     "result": "armor_qt_plate",
@@ -3101,7 +3125,12 @@
     "difficulty": 8,
     "time": "47 d 12 h 28 m",
     "book_learn": [ [ "textbook_armwest", 7 ] ],
-    "using": [ [ "blacksmithing_standard", 115 ], [ "lc_steel_standard", 30 ], [ "tailoring_leather_patchwork", 3 ] ],
+    "using": [
+      [ "blacksmithing_standard", 115 ],
+      [ "lc_steel_standard", 30 ],
+      [ "tailoring_leather_patchwork", 3 ],
+      [ "carbon", 5 ]
+    ],
     "qualities": [ { "id": "CHISEL", "level": 3 } ],
     "proficiencies": [
       { "proficiency": "prof_leatherworking_basic", "fail_multiplier": 1.15, "time_multiplier": 1.1 },
@@ -3109,18 +3138,24 @@
       { "proficiency": "prof_metalworking" },
       { "proficiency": "prof_blacksmithing" },
       { "proficiency": "prof_armorsmithing" },
-      { "proficiency": "prof_articulation" }
+      { "proficiency": "prof_articulation" },
+      { "proficiency": "prof_case_hardening" }
     ],
-    "tools": [ [ [ "swage", -1 ] ], [ [ "metal_tank", -1 ] ], [ [ "charcoal", 150 ] ] ]
+    "tools": [ [ [ "swage", -1 ] ], [ [ "metal_tank", -1 ] ] ]
   },
   {
     "result": "xl_armor_ch_heavyplate",
     "type": "recipe",
     "copy-from": "armor_ch_heavyplate",
     "time": "53 d 16 h 44 m",
-    "using": [ [ "blacksmithing_standard", 110 ], [ "lc_steel_standard", 39 ], [ "tailoring_leather_patchwork", 5 ] ],
+    "using": [
+      [ "blacksmithing_standard", 110 ],
+      [ "lc_steel_standard", 39 ],
+      [ "tailoring_leather_patchwork", 5 ],
+      [ "carbon", 7 ]
+    ],
     "qualities": [ { "id": "CHISEL", "level": 3 } ],
-    "tools": [ [ [ "swage", -1 ] ], [ [ "metal_tank", -1 ] ], [ [ "charcoal", 150 ] ] ]
+    "tools": [ [ [ "swage", -1 ] ], [ [ "metal_tank", -1 ] ] ]
   },
   {
     "result": "armor_ch_heavyplate",
@@ -3187,7 +3222,7 @@
       { "proficiency": "prof_articulation" },
       { "proficiency": "prof_quenching", "fail_multiplier": 2 }
     ],
-    "tools": [ [ [ "swage", -1 ] ], [ [ "metal_tank", -1 ] ], [ [ "water", -240 ] ] ]
+    "tools": [ [ [ "tongs", -1 ] ], [ [ "hotcut", -1 ] ], [ [ "metal_tank", -1 ] ], [ [ "water", -240 ] ] ]
   },
   {
     "result": "xl_armor_qt_heavyplate",
@@ -3196,7 +3231,7 @@
     "time": "56 d 3 h 19 m",
     "using": [ [ "blacksmithing_standard", 110 ], [ "mc_steel_standard", 39 ], [ "tailoring_leather_patchwork", 5 ] ],
     "qualities": [ { "id": "CHISEL", "level": 3 } ],
-    "tools": [ [ [ "swage", -1 ] ], [ [ "metal_tank", -1 ] ], [ [ "water", -240 ] ] ]
+    "tools": [ [ [ "tongs", -1 ] ], [ [ "hotcut", -1 ] ], [ [ "metal_tank", -1 ] ], [ [ "water", -120 ] ] ]
   },
   {
     "result": "armor_qt_heavyplate",
diff --git a/data/json/recipes/armor/torso.json b/data/json/recipes/armor/torso.json
index 75da8bfb13399..adb3521c2c071 100644
--- a/data/json/recipes/armor/torso.json
+++ b/data/json/recipes/armor/torso.json
@@ -194,7 +194,8 @@
     "difficulty": 6,
     "time": "4 h",
     "book_learn": [ [ "textbook_armwest", 6 ], [ "welding_book", 6 ] ],
-    "components": [ [ [ "charcoal", 64 ] ], [ [ "chestguard_metal_sheets", 1 ] ] ],
+	"using": [ "carbon", 3 ],
+    "components": [ [ "chestguard_metal_sheets", 1 ] ],
     "proficiencies": [ { "proficiency": "prof_metalworking" }, { "proficiency": "prof_blacksmithing" } ],
     "qualities": [ { "id": "HAMMER", "level": 2 } ],
     "tools": [ [ [ "forge", 64 ] ], [ [ "metalworking_tongs", -1 ] ] ]
@@ -224,7 +225,8 @@
     "difficulty": 6,
     "time": "6 h",
     "book_learn": [ [ "textbook_armwest", 6 ], [ "welding_book", 6 ] ],
-    "components": [ [ [ "charcoal", 128 ] ], [ [ "chestguard_metal_sheets_heavy", 1 ] ] ],
+	"using": [ "carbon", 5 ],
+    "components": [ [ "chestguard_metal_sheets_heavy", 1 ] ],
     "proficiencies": [ { "proficiency": "prof_metalworking" }, { "proficiency": "prof_blacksmithing" } ],
     "qualities": [ { "id": "HAMMER", "level": 2 } ],
     "tools": [ [ [ "forge", 128 ] ], [ [ "metalworking_tongs", -1 ] ] ]
@@ -254,7 +256,8 @@
     "difficulty": 6,
     "time": "3 h",
     "book_learn": [ [ "textbook_armwest", 6 ], [ "welding_book", 6 ] ],
-    "components": [ [ [ "charcoal", 32 ] ], [ [ "chestguard_metal_sheets_light", 1 ] ] ],
+	"using": [ "carbon", 2 ],
+    "components": [ [ "chestguard_metal_sheets_light", 1 ] ],
     "proficiencies": [ { "proficiency": "prof_metalworking" }, { "proficiency": "prof_blacksmithing" } ],
     "qualities": [ { "id": "HAMMER", "level": 2 } ],
     "tools": [ [ [ "forge", 32 ] ], [ [ "metalworking_tongs", -1 ] ] ]
@@ -2475,7 +2478,7 @@
     "difficulty": 6,
     "time": "11 d",
     "book_learn": [ [ "textbook_armwest", 7 ] ],
-    "using": [ [ "fabric_leather_fur_hide", 1 ], [ "blacksmithing_standard", 16 ], [ "lc_steel_standard", 4 ] ],
+    "using": [ [ "fabric_leather_fur_hide", 1 ], [ "blacksmithing_standard", 16 ], [ "lc_steel_standard", 4 ], [ "carbon", 5 ] ],
     "qualities": [ { "id": "CHISEL", "level": 3 } ],
     "tools": [ [ [ "swage", -1 ] ] ],
     "proficiencies": [
@@ -2483,7 +2486,7 @@
       { "proficiency": "prof_closures", "time_multiplier": 1.25, "fail_multiplier": 1.15 },
       { "proficiency": "prof_metalworking" },
       { "proficiency": "prof_blacksmithing" },
-      { "proficiency": "prof_leatherworking_basic", "fail_multiplier": 1.15 }
+      { "proficiency": "prof_leatherworking_basic", "fail_multiplier": 1.15 }, { "proficiency": "prof_case_hardening" }
     ]
   },
   {
@@ -2491,7 +2494,7 @@
     "type": "recipe",
     "copy-from": "armor_ch_light_chestplate",
     "time": "12 d 10 h 19 m",
-    "using": [ [ "fabric_leather_fur_hide", 2 ], [ "blacksmithing_standard", 22 ], [ "lc_steel_standard", 5 ] ],
+    "using": [ [ "fabric_leather_fur_hide", 2 ], [ "blacksmithing_standard", 22 ], [ "lc_steel_standard", 5 ], [ "carbon", 7 ] ],
     "qualities": [ { "id": "CHISEL", "level": 3 } ],
     "tools": [ [ [ "swage", -1 ] ] ]
   },
@@ -2507,7 +2510,7 @@
     "book_learn": [ [ "textbook_armwest", 7 ] ],
     "using": [ [ "fabric_leather_fur_hide", 1 ], [ "blacksmithing_standard", 16 ], [ "mc_steel_standard", 4 ] ],
     "qualities": [ { "id": "CHISEL", "level": 3 } ],
-    "tools": [ [ [ "swage", -1 ] ], [ [ "metal_tank", -1 ] ], [ [ "water", -120 ] ] ],
+    "tools": [ [ [ "tongs", -1 ] ], [ [ "hotcut", -1 ] ], [ [ "metal_tank", -1 ] ], [ [ "water", -120 ] ] ]
     "proficiencies": [
       { "proficiency": "prof_armorsmithing" },
       { "proficiency": "prof_closures", "time_multiplier": 1.25, "fail_multiplier": 1.15 },
@@ -2524,7 +2527,7 @@
     "time": "12 d 23 h 52 m",
     "using": [ [ "fabric_leather_fur_hide", 2 ], [ "blacksmithing_standard", 22 ], [ "mc_steel_standard", 5 ] ],
     "qualities": [ { "id": "CHISEL", "level": 3 } ],
-    "tools": [ [ [ "swage", -1 ] ], [ [ "metal_tank", -1 ] ], [ [ "water", -120 ] ] ]
+    "tools": [ [ [ "tongs", -1 ] ], [ [ "hotcut", -1 ] ], [ [ "metal_tank", -1 ] ], [ [ "water", -120 ] ] ]
   },
   {
     "result": "armor_lc_chestplate",
@@ -2626,7 +2629,7 @@
     "difficulty": 7,
     "time": "12 d 2 h 24 m",
     "book_learn": [ [ "textbook_armwest", 7 ] ],
-    "using": [ [ "fabric_leather_fur_hide", 1 ], [ "blacksmithing_standard", 16 ], [ "lc_steel_standard", 5 ] ],
+    "using": [ [ "fabric_leather_fur_hide", 1 ], [ "blacksmithing_standard", 16 ], [ "lc_steel_standard", 5 ], [ "carbon", 5 ] ],
     "qualities": [ { "id": "CHISEL", "level": 3 } ],
     "tools": [ [ [ "swage", -1 ] ] ],
     "proficiencies": [
@@ -2634,7 +2637,7 @@
       { "proficiency": "prof_closures", "time_multiplier": 1.25, "fail_multiplier": 1.15 },
       { "proficiency": "prof_metalworking" },
       { "proficiency": "prof_blacksmithing" },
-      { "proficiency": "prof_leatherworking_basic", "fail_multiplier": 1.15 }
+      { "proficiency": "prof_leatherworking_basic", "fail_multiplier": 1.15 }, { "proficiency": "prof_case_hardening" }
     ]
   },
   {
@@ -2642,7 +2645,7 @@
     "type": "recipe",
     "copy-from": "armor_ch_chestplate",
     "time": "13 d 16 h 9 m",
-    "using": [ [ "fabric_leather_fur_hide", 2 ], [ "blacksmithing_standard", 22 ], [ "lc_steel_standard", 6 ] ],
+    "using": [ [ "fabric_leather_fur_hide", 2 ], [ "blacksmithing_standard", 22 ], [ "lc_steel_standard", 6 ], [ "carbon", 7 ] ],
     "qualities": [ { "id": "CHISEL", "level": 3 } ],
     "tools": [ [ [ "swage", -1 ] ] ]
   },
@@ -2658,7 +2661,7 @@
     "book_learn": [ [ "textbook_armwest", 7 ] ],
     "using": [ [ "fabric_leather_fur_hide", 1 ], [ "blacksmithing_standard", 16 ], [ "mc_steel_standard", 5 ] ],
     "qualities": [ { "id": "CHISEL", "level": 3 } ],
-    "tools": [ [ [ "swage", -1 ] ], [ [ "metal_tank", -1 ] ], [ [ "water", -120 ] ] ],
+    "tools": [ [ [ "tongs", -1 ] ], [ [ "hotcut", -1 ] ], [ [ "metal_tank", -1 ] ], [ [ "water", -120 ] ] ],
     "proficiencies": [
       { "proficiency": "prof_armorsmithing" },
       { "proficiency": "prof_closures", "time_multiplier": 1.25, "fail_multiplier": 1.15 },
@@ -2675,7 +2678,7 @@
     "time": "14 d 7 h 4 m",
     "using": [ [ "fabric_leather_fur_hide", 2 ], [ "blacksmithing_standard", 22 ], [ "mc_steel_standard", 6 ] ],
     "qualities": [ { "id": "CHISEL", "level": 3 } ],
-    "tools": [ [ [ "swage", -1 ] ], [ [ "metal_tank", -1 ] ], [ [ "water", -120 ] ] ]
+    "tools": [ [ [ "tongs", -1 ] ], [ [ "hotcut", -1 ] ], [ [ "metal_tank", -1 ] ], [ [ "water", -120 ] ] ]
   },
   {
     "result": "armor_lc_heavy_chestplate",
@@ -2777,7 +2780,7 @@
     "difficulty": 8,
     "time": "13 d 4 h 48 m",
     "book_learn": [ [ "textbook_armwest", 7 ] ],
-    "using": [ [ "fabric_leather_fur_hide", 1 ], [ "blacksmithing_standard", 16 ], [ "lc_steel_standard", 6 ] ],
+    "using": [ [ "fabric_leather_fur_hide", 1 ], [ "blacksmithing_standard", 16 ], [ "lc_steel_standard", 6 ], [ "carbon", 5 ] ],
     "qualities": [ { "id": "CHISEL", "level": 3 } ],
     "tools": [ [ [ "swage", -1 ] ] ],
     "proficiencies": [
@@ -2785,7 +2788,7 @@
       { "proficiency": "prof_closures", "time_multiplier": 1.25, "fail_multiplier": 1.15 },
       { "proficiency": "prof_metalworking" },
       { "proficiency": "prof_blacksmithing" },
-      { "proficiency": "prof_leatherworking_basic", "fail_multiplier": 1.15 }
+      { "proficiency": "prof_leatherworking_basic", "fail_multiplier": 1.15 }, { "proficiency": "prof_case_hardening" }
     ]
   },
   {
@@ -2793,7 +2796,7 @@
     "type": "recipe",
     "copy-from": "armor_ch_heavy_chestplate",
     "time": "14 d 21 h 59 m",
-    "using": [ [ "fabric_leather_fur_hide", 2 ], [ "blacksmithing_standard", 22 ], [ "lc_steel_standard", 7 ] ],
+    "using": [ [ "fabric_leather_fur_hide", 2 ], [ "blacksmithing_standard", 22 ], [ "lc_steel_standard", 7 ], [ "carbon", 7 ] ],
     "qualities": [ { "id": "CHISEL", "level": 3 } ],
     "tools": [ [ [ "swage", -1 ] ] ]
   },
@@ -2809,7 +2812,7 @@
     "book_learn": [ [ "textbook_armwest", 7 ] ],
     "using": [ [ "fabric_leather_fur_hide", 1 ], [ "blacksmithing_standard", 16 ], [ "mc_steel_standard", 6 ] ],
     "qualities": [ { "id": "CHISEL", "level": 3 } ],
-    "tools": [ [ [ "swage", -1 ] ], [ [ "metal_tank", -1 ] ], [ [ "water", -120 ] ] ],
+    "tools": [ [ [ "tongs", -1 ] ], [ [ "hotcut", -1 ] ], [ [ "metal_tank", -1 ] ], [ [ "water", -120 ] ] ],
     "proficiencies": [
       { "proficiency": "prof_armorsmithing" },
       { "proficiency": "prof_closures", "time_multiplier": 1.25, "fail_multiplier": 1.15 },
@@ -2826,7 +2829,7 @@
     "time": "15 d 14 h 15 m",
     "using": [ [ "fabric_leather_fur_hide", 2 ], [ "blacksmithing_standard", 22 ], [ "mc_steel_standard", 7 ] ],
     "qualities": [ { "id": "CHISEL", "level": 3 } ],
-    "tools": [ [ [ "swage", -1 ] ], [ [ "metal_tank", -1 ] ], [ [ "water", -120 ] ] ]
+    "tools": [ [ [ "tongs", -1 ] ], [ [ "hotcut", -1 ] ], [ [ "metal_tank", -1 ] ], [ [ "water", -120 ] ] ]
   },
   {
     "result": "load_bearing_vest_sling",
diff --git a/data/json/recipes/recipe_others.json b/data/json/recipes/recipe_others.json
index ea0cdeace2010..1e04e056684e8 100644
--- a/data/json/recipes/recipe_others.json
+++ b/data/json/recipes/recipe_others.json
@@ -766,9 +766,10 @@
     "difficulty": 3,
     "time": "30 m",
     "autolearn": true,
-    "using": [ [ "blacksmithing_standard", 2 ] ],
-    "proficiencies": [ { "proficiency": "prof_metalworking" }, { "proficiency": "prof_blacksmithing" } ],
-    "components": [ [ [ "ch_steel_lump", 1 ] ] ]
+    "using": [ [ "blacksmithing_standard", 2 ], [ "carbon", 1 ] ],
+    "proficiencies": [ { "proficiency": "prof_metalworking" }, { "proficiency": "prof_blacksmithing" }, 
+      { "proficiency": "prof_case_hardening" } ], 
+    "components": [ [ [ "lc_steel_lump", 1 ] ] ]
   },
   {
     "type": "recipe",
@@ -782,14 +783,16 @@
     "time": "20 m",
     "autolearn": true,
     "qualities": [ { "id": "ANVIL", "level": 3 }, { "id": "HAMMER", "level": 3 } ],
-    "proficiencies": [ { "proficiency": "prof_metalworking" }, { "proficiency": "prof_blacksmithing" } ],
+	"using": " [ "carbon", 1 ],
+    "proficiencies": [ { "proficiency": "prof_metalworking" }, { "proficiency": "prof_blacksmithing" }, 
+      { "proficiency": "prof_case_hardening" } ],
     "tools": [
       [ [ "tongs", -1 ] ],
       [ [ "hotcut", -1 ] ],
       [ [ "forge", 40 ], [ "oxy_torch", 40 ] ],
       [ [ "wire_draw_machine", 100 ] ]
     ],
-    "components": [ [ [ "ch_steel_lump", 1 ] ] ]
+    "components": [ [ [ "lc_steel_lump", 1 ] ] ]
   },
   {
     "type": "recipe",
diff --git a/data/json/recipes/weapon/cutting.json b/data/json/recipes/weapon/cutting.json
index 3c1d7ac9ccc76..5fffd3df8a23b 100644
--- a/data/json/recipes/weapon/cutting.json
+++ b/data/json/recipes/weapon/cutting.json
@@ -930,11 +930,11 @@
       { "proficiency": "prof_metalworking" },
       { "proficiency": "prof_blacksmithing" },
       { "proficiency": "prof_bladesmith" },
-      { "proficiency": "prof_case_hardening" }
+      { "proficiency": "prof_quenching" }
     ],
-    "using": [ [ "blacksmithing_standard", 12 ], [ "lc_steel_standard", 4 ], [ "carbon", 1 ] ],
+    "using": [ [ "blacksmithing_standard", 12 ], [ "mc_steel_standard", 4 ] ],
     "qualities": [ { "id": "ANVIL", "level": 3 }, { "id": "HAMMER", "level": 3 }, { "id": "GRIND", "level": 2 } ],
-    "tools": [ [ [ "tongs", -1 ] ], [ [ "hotcut", -1 ] ] ],
+    "tools": [ [ [ "tongs", -1 ] ], [ [ "hotcut", -1 ] ], [ [ "metal_tank", -1 ] ], [ [ "water", -120 ] ] ],
     "components": [ [ [ "scrap_kevlar", 2 ], [ "thermo_resin_chunk", 1 ] ] ]
   },
   {