Alloy Specification Carbon Manganese Silicon Chromium Nickel Molybdenum Phosphorus Sulfur Iron
1020 Mil-S-81591 IC 1020 0.15 to 0.25 0.30 to 0.50 0.20 to 1.00 0.04 0.04 Balance
1020 ASTM A216 WCC 0.25 1.20 0.50 0.50 0.50 0.20 0.04 0.045 Balance
1025 ASTM A216 WCB 0.30 1.00 0.60 0.50 0.50 0.20 0.04 0.045 Balance
1025 ASTM A352 LCB 0.30 1.00 0.60 0.50 0.50 0.20 0.04 0.045 Balance
1030 Mil-S-22141B/81591 IC 1030 0.25 to 0.35 0.70 to 1.00 0.20 to 1.00 0.04 0.04 Balance
1040 Mil-S-22141B/81591 IC 1040 0.35 to 0.45 0.70 to 1.00 0.20 to 1.00 0.04 0.04 Balance
1050 Mil-S-22141B/81591 IC 1050 0.45 to 0.55 0.70 to 1.00 0.20 to 1.00 0.04 0.04 Balance
4115 ASTM A217 WC9 0.05 to 0.18 0.40 to 0.70 0.60 2.00 to 2.75 0.50 0.90 to 1.20 0.04 0.04 Balance
4130 AMS 5336 0.25 to 0.35 0.40 to 0.80 1.00 0.80 to 1.10 0.25 0.15 to 0.25 0.04 0.04 Balance
4130 Mil-S-22141B IC 4130 0.25 to 0.35 0.40 to 0.70 0.20 to 0.80 0.80 to 1.10 0.25 0.15 to 0.25 0.04 0.04 Balance
4140 AMS 5338 0.35 to 0.45 0.75 to 1.00 1.00 0.80 to 1.10 0.25 0.15 to 0.25 0.04 0.04 Balance
4140 Mil-S-22141B IC 4140 0.35 to 0.45 0.70 to 1.05 0.20 to 0.80 0.80 to 1.10 0.15 to 0.25 0.04 0.04 Balance
4340 Mil-S-22141B IC 4340 0.36 to 0.44 0.60 to 0.90 0.20 to 0.80 0.70 to 0.90 1.65 to 2.00 0.20 to 0.30 0.025 0.025 Balance
8620 Mil-S-22141B IC 8620 0.25 to 0.35 0.60 to 0.95 1.00 0.35 to 0.65 0.40 to 0.70 0.15 to 0.25 0.04 0.04 Balance