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Plain Carbon and Low Alloy Steel Investment Cast Compositions


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Plain Carbon and Low Alloy Steel Chemistry
  Carbon
Min-Max		 Manganese
Min-Max		 Silicon
Min-Max		 Chromium
Min-Max		 Nickel
Min-Max		 Molybdenum
Min-Max		 Phosphorus
Max		 Sulfur
Max		 Iron Other Melting
Range
Alloy Type
1020 Investment Cast 0.15-0.25 0.20-0.60 0.20-0.60 0.25 Max 0.25 Max 0.25 Max 0.04 0.045 Bal. Cu 0.25 Max 2770-2810
1045 Investment Cast 0.40-0.50 0.50-0.90 0.20-0.50       0.05 0.06 Bal.   2700-2740
1050 Investment Cast 0.45-0.55 0.70-1.00 0.20-1.00 0.25 Max 0.25 Max 0.25 Max 0.04 0.04 Bal. Cu 0.25 Max 2700-2740
1095 Investment Cast 0.90-1.03 0.30-0.50 0.20-1.00 0.25 Max 0.25 Max 0.10 Max 0.04 0.05 Bal. Cu 0.25 Max 2700-2740
4130 Investment Cast 0.25-0.35 0.40-0.70 0.20-0.80 0.80-1.10 0.25 Max 0.15-0.25 0.04 0.04 Bal. Cu 0.25 Max 2775-2815
4140 Investment Cast 0.35-0.45 0.75-1.0 0.20-0.80 0.80-1.10 0.25 Max 0.15-0.25 0.04 0.04 Bal. Cu .25 Max 2765-2805
4150 Investment Cast 0.45-0.55 0.75-1.0 0.20-0.80 0.80-1.10 0.25 Max 0.15-0.25 0.04 0.04 Bal.   2750-2790
4340 Investment Cast 0.36-0.44 0.60-0.90 0.20-0.80 0.70-0.90 1.65-2.00 0.20-0.30 0.04 0.04 Bal. Cu .35 Max 2720-2760
6150 Investment Cast 0.45-0.55 0.65-0.95 0.20-0.80 0.80-1.10     0.04 0.04 Bal. V .15 Min 2700-2740
8620 Investment Cast 0.15-0.25 0.65-0.95 0.28-0.80 0.40-0.70 0.40-0.70 0.15-0.25 0.04 0.04 Bal. Cu .25 Max 2700-2740
8640 Investment Cast 0.35-0.45 0.70-1.05 0.20-0.80 0.40-0.60 0.40-0.70 0.15-0.25 0.04 0.04 Bal.   2720-2740
8650 Investment Cast 0.45-0.55 0.70-1.05 0.20-0.80 0.40-0.60 0.40-0.70 0.15-0.25 0.04 0.04 Bal.   2730-2740

 

Plain Carbon and Low Alloy Steel Investment Cast Properties

 

Plain Carbon and Low Alloy Steel Alloy Properties
  Condition Tensile Strength 0.2% Yield Strength % Elongation Range (2.5 cm or 1”) Hardness Range or Max
Alloy Type English PSI Metric MPa English PSI Metric MPa  
1020 Investment Cast Annealed 60-70,000 414-483 40-45,000 276-310 25-40 80 Rb
1045 Investment Cast Annealed Hardened 80-90,000 100-180,000 552-621 690-1241 50-60,000 90-180,000 345-414 621-1241 20-25 0-10 100 Rb 25-57 Rc
1050 Investment Cast Annealed Hardened 90-110,000 125-180,000 621-758 862-1241 50-65,000 100-180,000 345-448 690-1241 10-25 0-10 100 Rb 20-45 Rc
1095 Investment Cast Annealed Hardened - - - - - - - - - - 100 Rb 40-60 Rc
4130 Investment Cast Annealed Hardened - 130-170,000 - 896-1172 - 100-130,000 - 690-896 - 5-20 100 Rb 23-49 Rc
4140 Investment Cast Annealed Hardened - 130-200,000 - 876-1394 - 100-155,000 - 690-1069 - 5-20 100 Rb 29-57 Rc
4150 Investment Cast Annealed Hardened - 140-200,000 - 965-1394 - 120-180,000 - 827-1241 - 5-10 100 Rb 25-58 Rc
4340 Investment Cast Annealed Hardened - 130-200,000 - 876-1394 - 100-180,000 - 690-1241 - 5-20 20 Rc 20-55 Rc
6150 Investment Cast Annealed Hardened - 140-200,000 - 965-1394 - 120-180,000 - 827-1241 - 5-10 100 Rb 30-60 Rc
8620 Investment Cast Annealed Hardened - 100-130,000 - 690-896 - 80-110,000 - 552-758 - 10-20 100 Rb 20-45 Rc
8640 Investment Cast Annealed Hardened - 130-120,000 - 876-1394 - 100-180,000 - 690-1241 - 5-20 20 Rc 30-60 Rc
8650 Investment Cast Annealed Hardened - 140-200,000 - 965-1394 - 120-180,000 - 827-1241 - 4-10 25 Rc 30-58 Rc

 

Mechanical Property values are for information only. They are determined from test bars and do not necessarily apply to castings. Any requirements for mechanical properties that are beyond the above information must be discussed with and agreed to by WPCC.

Cross-Index of Various Alloy Designations For Plain Carbon and Low Alloy Steel Investment Cast Alloys

 

Plain Carbon and Low Alloy Steel Cross-Index
Alloy or Type AMS Other Designation  
1020 Investment Cast   SAE J403ASTM A732 1A MIL-S-22141B IC1020
1045 Investment Cast      
1050 Investment Cast   ASTM A732 4A, 4Q MIL-S-22141B IC1050
1095 Investment Cast      
4130 Investment Cast 5336 ASTM A732 7Q MIL-S-22141B IC4130
4140 Investment Cast 5338 ASTM A732 8Q MIL-S-22141B IC4140
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