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Carbon and low alloy steels classification

ASTM - American Society for Testing and MaterialsAMS - Aerospace Material Specification
AISI - American Iron and Steel InstituteIC - Investment Casting Institute
MIL - Military SpecificationSAE - Society of Automotive Engineers
ACI - Alloy Casting InstituteIN - International Nickel
 QQ - Federal Specifications

 

Carbon and Low Alloy Steels
AlloySpecificationCarbon Min-MaxManganese Min-MaxSilicon Min-MaxChromium Min-MaxNickel Min-MaxMolybdenum Min-MaxPhosphorus Min-MaxSulfur Min-MaxIronOtherMelting Range 0F
1020MIL-S-22141B IC 1020
MIL-S-81591 IC 1020
.15- .25.30- .60.20-1.00   .04.04Bal. 2770-2810
ASTM A-27 GR N-1.25.75.80   .0506Bal. 2770-2810
ASTM A-27 GR U60-30.25.75.80   .0506Bal. 2770-2810
ASTM A-27 GR 70-40.251.20.80   .0506Bal. 2770-2810
ASTM A-216 GR WCA.25.70.60.50*.50*.20*.04.045Bal.Cu*, .30 Max.;V*, .03 Max. Total "*" Elements, 1.00 Max.2770-2810
ASTM A-216 GR WCC.251.20.60.50*.50*.20*.04.045Bal.Cu*, .30 Max.;V*, .03 Max. Total "*" Elements 1.00 Max.2770-2810
ASTM A-352 GR LCA.25.70.60.50*.50*.20*.04.045Bal.Cu*, .30 Max.;V*, .03 Max.2770-2810
ASTM A-352 GR LCC.251.20.60.50*.50*.20*.04.045Bal.Cu*, .30 Max.;V*, .03 Max.2770-2810
IC 1020.15- .25.20- .60.20- .60.25.25.25.04.045Bal.Cu*, .25 Max.2755-2795
ASTM A-732 GR 1A.15- .25.20- .60.20-1.00.35*.50* .04.045Bal.Cu*, .50 Max.; 
Mo + W*, .25 Max. Total Unspec. * 1.00 Max
2770-2810
1025ASTM A-27 GR 60-30.30.60.80   .05.06Bal. 2770-2810
ASTM A-27 GR 65-35.30.70.80   .05.06Bal. 2770-2810
ASTM A-216 GR WCB.301.00.60.50*.50*.20*.04.045Bal.Cu*, .30 Max.;V*, .03 Max. Total "*" Elements 1.00 Max.2770-2810
1025 Cont.ASTM A-352 GR LCB.301.00.60.50*.50*.20*.04.045Bal.Cu*, .30 Max.; V*, .03 Max.2770-2810
QQ-S-681d CL 65-35 (Discontinued).30.70.80.35.50*.20*.05.06Bal.Cu*, .30 Max.;Cu + Ni + Mo, 1.0 Max.2755-2795
1025 MOD.ASTM A-487 GR I-A,B,C.301.00.80.35*.50* .04.045Bal.Cu*, .50 Max.; V, .04-.12; Mo + W*, .25 Max. Total Unspec.* 1.00 Max.2755-2795
1030MIL-S-22141B IC 1030
MIL-S-81591 IC 1030
.25- .35.70-1.00.20-1.00   .04.04Bal. 2755-2795
ASTM A-27 GR N-2.35.60.80   .05.06Bal. 2770-2810
ASTM A-27 GR 70-36.35.70.80   .05.06Bal. 2770-2810
ASTM A-732 GR 2A, 2Q.25- .35.70-1.00.20-1.00.35*.50* .04.045Bal.Cu*, .50 Max.; W*, .10 Max. Total Unspec. * 1.00 Max.2755-2795
IC 1030.25- .35.70-1.00.20- .60.25.25.25.04.045Bal.Cu, .25 Max.2755-2795
1040MIL-S-22141B IC 1040 
MIL-S-81591 IC 1040
.35- .45.70-1.00.20-1.00   .04.04Bal. 2730-2770
ASTM A-732 GR 3A, 3Q.35- .45.70-1.00.20-1.00.35*.50* .04.045Bal.Cu*, .50 Max.; W*, .10 Max. Total Unspec. * 1.00 Max.2730-2770
IC 1040.35- .45.70-1.00.20-1.00.25.25.25.04.045Bal.Cu, .25 Max.2730-2770
1050IC 1050.45- .55.70-1.00.20-1.00.25.25.25.04.045Bal.Cu, .25 Max.2700-2740
MIL-S-22141B IC 1050 
MIL-S-81591 IC 1050
.45- .55.70-1.00.20-1.00   .04.04Bal. 2700-2740
QQ-S-681d CL-80-40 (Discontinued).50.90.80   .05.06Bal. 2700-2740
ASTM A-732 GR 4A, 4Q.45- .55.70-1.00.20-1.00   .04.045Bal.Cu*, .50 Max.; W*, .10 Max. Total Unspec. * 0.60 Max.2700-2740
2317 MOD.ASTM A-352 GR LC3.15.50- .80.60 3.00-4.00 .04.045Bal. 2700-2740
2345IC 2345.40- .50.70- .90.20- .80.253.25-3.75.25.04.04Bal.Cu, .25 Max.2700-2740
2512 MOD.ASTM A-352 GR LC4.15.50- .80.60 4.00-5.00 .04.045Bal. 2700-2740
3120IC 3120.15- .25.60- .80.20- .80.55- .751.10-1.40.25.04.04Bal.Cu, .25 Max.2700-2740
4020ASTM A-352 GR LC2.25.50- .80.60 2.0 -3.00 .04.045Bal. 2700-2740
ASTM A-487 GR 1-A,B,C.301.00.80.35*.50* .04.045Bal.Cu*, .50 Max.; V, .04-.12; Mo + W*, .25 Max. Total Unspec.* 1.00 Max.2755-2795
ASTM A-732 GR 6N.351.35-1.75.20- .80.35*.50*.25-.55.04.045Bal.Cu*, .50 Max.; W*, .25 Max. Total Unspec. * 1.00 Max.2740-2780
4020 MOD.ASTM A-217 GR WC1.25.50- .80.60.35*.50*.45- .65.04.045Bal.Cu*, .50 Max.; W*, .10 Max. Total "*" Elements 1.00 Max.2770-2810
ASTM A-352 GR LC1.25.50- .80.60  .45- .65.04.045Bal. 2770-2810
ASTM A-487 GR 2-A,B,C.301.00-1.40.80.35*.50*.10- .30.04.045Bal.Cu*, .50 Max.; V*, .03 Max.; W*, .10 Max. Total Unspec. *1.00 Max.2755-2795
4115 MOD.ASTM A-217 GR WC9.05- .18.40-.70.602.00-2.75.50*.90-1.20.04.045Bal.Cu*, .50 Max.; W*, .10 Max. Total "*" Elements, 1.00 Max.2730-2770
4118 MOD.ASTM A-217 GR WC6.05- .20.50- .80.601.00-1.50.50*.45- .65.04.045Bal.Cu*, .50 Max.; W*, .10 Max. Total "*" Elements, 1.00 Max.2730-2770
ASTM A-217 GR WC11.15- .21.50- .80.30- .601.00-1.50.50*.45- .65.020.015Bal.Cu*, .35 Max.; V*, .03 Max. Al, .01 Max, Total "*" Elements, 1.00 Max.2730-2770
4130AMS 5336 D.25- .35.40-.801.00.80-1.10.25.15- .25.04.04Bal.Cu, .25 Max.2775-2815
MIL-S-22141B IC 4130.25- .35.40-.70.20- .80.80-1.10 .15- .25.04.04Bal. 2775-2815
IC 4130.25- .35.40-.70.20- .80.80-1.10.25.15- .25.04.04Bal.Cu, .25 Max.2775-2815
ASTM A-487 GR 9-A,B,C,D.33.60-1.00.80.75-1.10.50*.15- .30.04.045Bal.Cu*, .50 Max.; V*, .03 Max.; W*, .10 Max. Total Unspec. *1.00 Max.2700-2740
ASTM A-732 GR 7Q.25- .35.40- .70.20- .80.80-1.10 .15- .25.04.045Bal.Cu*, .50 Max.; W*, .10 Max. Total Unspec. * 0.60 Max.2775-2815
4140AMS 5338C.35- .45.75-1.01.00.80-1.10.25.15- .25.04.04Bal.Cu, .35 Max.2765-2805
MIL-S-22141B IC 4140.35- .45.70-1.05.20- .80.80-1.10 .15- .25.04.04Bal. 2765-2805
IC 4140.35- .45.70-1.0.20- .80.80-1.10.25.15- .25.04.04Bal.Cu, .25 Max.2765-2805
ASTM A-732 GR 8Q.35- .45.70-1.00.20- .80.80-1.10.50*.15- .25.04.045Bal.Cu*, .50 Max.; W*, .10 Max. Total Unspec. *1.00 Max.2765-2805
4320 MOD.ASTM A-487 GR 10-A,B.30.60-1.00.80.55- .901.40-2.00.20- .40.04.045Bal.Cu*, .50 Ma.,; V*, .30 Max. W*, .10 Max. Total Unspec, *0.60 Max.2700-2740
ASTM A-352 GR LC2-1.22.55- .75.501.35-1.852.50-3.50.30- .60.04.045Bal. 2700-2740
4330AMS 5328C.28- .36.60-1.00.50-1.00.65-1.001.65-2.00.30- .45.025.025Bal.Cu, .35 Max.2725-2765
ASTM A-732 GR 9Q.25- .35.40- .70.20- .80.70- .901.65-2.00.20- .30.04.045Bal.Cu*, .50 Ma.,; W*, .10 Max. Total Unspec. *0.60 Max.2725-2765
4335 MOD.MIL-S-22141B IC 4335M.30- .38.60-1.00.50-1.00  .65-1.00.025.025Bal.V, .14 Max.2720-2760
4340AMS 5330C.38- .46.60-1.00.50-1.00.65-1.001.65-2.00.30- .45.025.025Bal.Cu, .35 Max.2720-2760
MIL-S-22141 IC 4340.36- .44.60- .90.20- .80.70- .901.65-2.00.20- .30.025.025Bal. 2720-2760
ASTM A-732 GR 10Q.35- .45.70-1.00.20- .80.70- .901.65-2.00.20- .30.04.045Bal.Cu*, .50 Max; W*, .10 Max. Total Unspec. * 1.00 Max.2720-2760
4620MIL-S-22141B IC 4620.15- .25.40- .70.20- .80 1.65-2.00.20- .30.04.04Bal. 2720-2760
ASTM A-732 GR 11Q.15- .25.40- .70.20- .80.35*1.65-2.00.20- .30.04.045Bal.Cu*, .50 Max.; W*, .10 Max. Total Unspec. * 1.00 Max.2720-2760
4620 MOD.ASTM A-487 GR 13-A,B.30.80-1.10.60.40*1.40-1.75.20- .30.04.045Bal.Cu*, .50 Max,; W*, .10Max.; V*, .03 Max. Total Unspec. *0.75 Max.2730-2770
4640 MOD.ASTM A-487 GR 14-A.55.80-1.10.60.40*1.40-1.75.20- .30.04.045Bal.Cu*, .50 Max.; W*, .03 Max.; W*, .10 Max. Total Unspec. *0.75 Max.2730-2770
4718 MOD.ASTM A-217 GR WC4.05- .20.50- .80.60.50- .80.70-1.10.45- .65.04.045Bal.Cu*, .50 Max.; W*, .10 Max. Total "*" Elements, .60 Max.2720-2760
ASTM A-217 GR WC5.05- .20.40- .70.60.50- .90.60-1.00.90-1.20.04.045Bal.Cu*, .50 Max.; W*, .10 Max. Total "*" Elements, .60 Max.2730-2770
ASTM A-487 GR 7-A.20.60-1.00.80.40- .80.70-1.00.40- .60.04.045Bal.Cu, .15-50; V, .03- .10; W* , .10 Max.; B, .002-.006 Total Unspec. * 0.60 Max.2700-2740
ASTM A-487 GR 11-A,B.20.50- .80.60.50- .80.70-1.10.45- .65.04.045Bal.Cu*, .50 Max.; V*, .03 Max.; W* , .10 Max. Total Unspec. * 0.50 Max.2700-2740
ASTM A-487 GR 12-A,B.20.40- .70.60.50- .90.60-1.00.90-1.20.04.045Bal.Cu*, .50 Max.; V*, .03 Max.; W* , .10 Max. Total Unspec. * 0.50 Max.2700-2740
4815 MOD.ASTM A-352 GR LC2.25.50- .80.60 2.00-3.00 .04.045Bal. 2750-2790
6120ASTM A-732 GR 5N.30.70-1.00.20- .80.35*.50* .04.045Bal.Cu*, .50 Max.; V, .05-.15; Mo + W*, .25 Max. Total Unspec.* 1.00 Max.2700-2740
6150MIL-S-22141B IC 6150.45- .55.65- .95.20- .80.80-1.10  .04.04Bal.V, .15 Min.2700-2740
ASTM A-732 GR 12Q.45- .55.65- .95.20- .80.80-1.10.50* .04.045Bal.Cu*, .50 Max.; V, .15 Min.; W*, .10 Max.; Mo + W*, .10 Max. Total Unspec. * 1.00 Max.2700-2740
8615AMS 5333C.11- .17.65-1.0.50-1.00.35- .65.35- .75.15- .35.04.04Bal.Cu, .35 Max.2700-2740
8620MIL-S-22141B IC 8620.15- .25.65- .95.20- .80.40- .60.40- .70.15- .25.04.04Bal. 2700-2740
ASTM A-487 GR 4-A,B,C,D,E.301.00.80.40- .80.40- .80.15- 30.04.045Bal.Cu*, .50 Max.; V*, .03 Max.; W*, .10 Max. Total Unspec. *.0.60 Max.2700-2740
ASTM A-732 GR 13Q.15- .25.65- .95.20- .80.40- .70.40- .70.15- .25.04.045Bal.Cu*, .50 Max. W*, .10 Max. Total Unspec. * 1.00 Max.2720-2740
IC 8620.15- .25.65- .95.28- .80.40- 70.40- .70.15- .25.04.045Bal.Cu*, .25 Max.2720-2740
8620 MOD.ASTM A-487 GR 6-A,B.381.30-1.70.80.40- .80.40- .80.30- .40.04.045Bal.Cu*, .50 Max.; V*, .03 Max.; W*, .10 Max. Total Unspec. *0.60 Max.2720-2740
8630AMS 5334D.25- .35.60- .951.00.35- .65.35- .75.15- .30.04.04Bal.Cu, .35 Max.2720-2740
MIL-S-22141B IC 8630.25- .35.65- .95.20- .80.40- .60.40- .70.15- .25.04.04Bal. 2720-2740
ASTM A-732 GR 140 Q.25- .35.65- .95.20- .80.40- .70.40- .70.15- .25.04.045Bal.Cu*, .50 Max.; W*, .10 Max. Total Unspec. * 1.00 Max.2720-2740
IC 8630.25- .35.65- .95.20- .80.40- .70.40- .70.15- .25.04.045Bal.Cu* , .25 Max2720-2740
8635 MOD.MIL-S-22141B IC 8635.30 -.38.30- .70.20-1.00.35- .90.35- .75.15- .40.025.025Bal. 2720-2740
8640MIL-S-22141B IC 8640.35- .45.70-1.05.20- .80.40- .60.40- .70.15- .25.04.04Bal. 2720-2740
8730IC 8730.25- .35.70- .90.20- .80.40- .60.40- .70.15- .30.04.04Bal.Cu, .25 Max2720-2740
52100MIL-S-22141B IC 52100.95-1.10.25- .55.20- .801.30-1.60  .04.04Bal. 2640-2680
ASTM A-732 GR 15A.95-1.10.25- .55.20- .801.30-1.60.50* .04.045Bal.Cu*, .50 Max.; W*, .10 Max. Total Unspec. * 0.60 Max.2640-2680
Misc.ASTM A-217 C5.20.40- .70.754.00-6.50.50*.45- .65.04.045Bal.Cu*, .50 Max.; W*, .10 Max. Total "* " Elements, 1.00 Max.2550-2650
ASTM A-217 C12.20.35- .651.008.00-10.00.50*.90-1.20.04.045Bal.Cu*, .50 Max.; W*, .10 Max. Total "* " Elements, 1.00 Max.2550-2650
ASTM A-352 GR LC9.13.90.45.508.5 -10.0.20.04.045Bal.Cu, .30 Max.; V, .03 Max.2700-2750
ASTM A-356 GR 1.35.70.60   .035.030Bal. 2770-2810
ASTM A-356 GR 2.25.70.60  .45- .65.035.030Bal. 2775-2815
Misc.ASTM A-356 GR 5.25.70.60.40- .70 .40- .60.035.030Bal. 2775-2815
ASTM A-356 GR 6.20.50- .80.601.00-1.50 .45- .65.035.030Bal. 2775-2815
ASTM A-356 GR 8.20.50- .90.20- .601.00-1.50 .90-1.20.035.030Bal.V, .05-.152775-2815
ASTM A-356 GR 9.20.50- .90.20- .601.00-1.50 .90-1.20.035.030Bal.V, .20-.352775-2815
ASTM A-356 GR 10.20.50- .80.602.00-2.75 .90-1.20.035.030Bal. 2730-2770
ASTM A-389 GR C 23.20.30- .80.601.00-1.50 .45- .65.04.045Bal.V, .15-.252700-2740
ASTM A-389 GR C 24.20.30- .80.60.80-1.25 .90-1.20.04.045Bal.V, .15-.252700-2740
ASTM A-487 GR 8-A,B,C,D.20.50- .90.802.00-2.75 .90-1.10.04.045Bal.Cu*, .50 Max.; V*, .03 Max.; W*, .10 Max. Total Unspec. *0.60 Max.2700-2740
ASTM A-757 GR A1Q.301.00.60.40*.50*.25*.025.025Bal.V*, .03 Max.; Cu*, .50 Max.; Total Residuals*, 1.00 Max.2770-2810
ASTM A-757 GR A2Q.251.20.60.40*.50*.25*.025.025Bal.V*, .03 Max.; Cu*, .50 Max.; Total Residuals*, 1.00 Max.2770-2810
ASTM A-757 GR B2N B2Q.25.50- .80.60.40*2.0 -3.0.25*.025.025Bal.V*, .03 Max.; Cu*, .50 Max.; Total Residuals*, 1.00 Max.2770-2810
ASTM A-757 GR B3N B3Q.15.50- .80.60.40*3.0 -4.0.25*.025.025Bal.V*, .03 Max.; Cu*, .50 Max.; Total Residuals*, 1.00 Max.2700-2740
ASTM A-757 GR B4N B4Q.15.50- .80.60.40*4.0 -5.0.25*.025.025Bal.V*, .03 Max.; Cu*, .50 Max.; Total Residuals*, 1.00 Max.2700-2740
Misc.ASTM A-757 GR C1Q.251.20.60.40*1.5 -2.0.15- .30.025.025Bal.V*, .03 Max.; Cu*, .50 Max.; Total Residuals*, 1.00 Max.2720-2760
ASTM A-757 
D1N1 D1Q1 
GR D1N2 D1Q2 
D1N3 D1Q3
.20.40- .80.602.0 -2.75.50*.90-1.20.025.025Bal.V*, .03 Max.; Cu*, .50 Max. W*, .10 Max.; Total Residuals*, 1.00 Max.2730-2810
ASTM A-757 GR E1Q.22.50- .80.601.35-1.852.5 -3.5.35- .60.025.025Bal.V*, .03 Max.; Cu*, .50 Max.; Total Residuals*, 0.70 Max.2730-2770
ASTM A-757 GR E2N E2Q.20.40- .70.601.50-2.02.75-3.90.40- .60.020.020Bal.V*, .03 Max.; Cu*, .50 Max. W*, .10 Max.; Total Residuals*, 0.70 Max.2720-2760
ASTM A-757 GR E3N.061.001.0011.5-14.03.5 -4.5.40-1.0.030.030Bal.Cu*, .50 Max.; W*, .10 Max.; Total Residuals*, 0.50 Max.2700-2790
ASTM A-487 GR 16-A.122.10.50.20*1.00-1.40.10*.02.02Bal.Cu*, .20 Max.; W*, .10 Max.; V*, .02 Max.; Total Unspec.*, 0.50 Max.2720-2760
MIL-S-22141B
NITRALLOY 135M
.35- .45.40- .70.20-.801.40-1.80 .30- .45.04.04Bal.AL, .85-1.202765-2800
IC 1722 AS.27- .34.45- .65.55-.751.00-1.50.25.40- .60.04.04Bal.Cu, .25 Max.2700-2740
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