〔22〕机械构造用镍铬钼钢
(Nickel Chromium Molybdenum Steels for Machine Structural use)
标准代号	规格号码	记号	化学成分（%)Chemical composition
			C	Si	Mn	P	S	Ni	Cr	Mo	Cu
CNS	3271	SNCM220	0.17-0.23	0.15-0.35	0.6-0.9	≦0.03	≦0.03	0.4-0.7	0.40-0.65	0.15-0.30	≦0.3
GB	3077	20CrNiMo	0.17-0.23	0.17-0.37	0.6-0.95	≦0.035	≦0.035	0.35-0.75	0.4-0.7	0.2-0.3	≦0.3
JIS	G4103	SNCM220	0.17-0.23	0.15-0.35	0.6-0.9	≦0.03	≦0.03	0.4-0.7	0.40-0.65	0.15-0.30	≦0.3
AISI	-	8615	0.13-0.18	0.15-0.30	0.7-0.9	≦0.035	≦0.04	0.4-0.7	0.4-0.6	0.15-0.25	-
AISI	-	8617	0.15-0.20	0.15-0.30	0.7-0.9	≦0.035	≦0.04	0.4-0.7	0.4-0.6	0.15-0.25	-
AISI	-	8620	0.18-0.23	0.15-0.30	0.7-0.9	≦0.035	≦0.04	0.4-0.7	0.4-0.6	0.15-0.25	-
AISI	-	8622	0.18-0.25	0.15-0.30	0.7-0.9	≦0.035	≦0.04	0.4-0.7	0.4-0.6	0.15-0.25	-
DIN	17210	20MoCr4	0.17-0.22	0.15-0.40	0.6-0.9	≦0.035	≦0.035	-	0.3-0.5	0.4-0.5	-
CNS	3271	SNCM240	0.38-0.43	0.15-0.35	0.7-1.0	≦0.03	≦0.03	0.4-0.7	0.40-0.65	0.15-0.30	≦0.3
JIS	G4103	SNCM240	0.38-0.43	0.15-0.35	0.7-1.0	≦0.03	≦0.03	0.4-0.7	0.40-0.65	0.15-0.30	≦0.3
AISI	-	8637	0.35-0.40	0.15-0.35	0.75-1.00	≦0.035	≦0.04	0.4-0.7	0.4-0.6	0.15-0.25	-
AISI	-	8640	0.38-0.43	0.15-0.35	0.75-1.00	≦0.035	≦0.04	0.4-0.7	0.4-0.6	0.15-0.25	-
DIN	17210	40NiCrMo22	0.37-0.44	0.15-0.40	0.7-1.0	≦0.035	≦0.035	0.4-0.7	0.4-0.6	0.15-0.30	-
CNS	3271	SNCM415	0.12-0.18	0.15-0.35	0.4-0.7	≦0.03	≦0.03	1.6-2.0	0.40-0.65	0.15-0.30	≦0.3
GB	3077	12CrNi2	0.10-0.17	0.17-0.37	0.3-0.6	≦0.035	≦0.035	1.5-1.9	0.6-0.9	-	-
JIS	G4103	SNCM415	0.12-0.18	0.15-0.35	0.4-0.7	≦0.03	≦0.03	1.6-2.0	0.40-0.65	0.15-0.30	≦0.3
CNS	3271	SNCM420	0.17-0.23	0.15-0.35	0.4-0.7	≦0.03	≦0.03	1.6-2.0	0.40-0.65	0.15-0.30	≦0.3
JIS	G4103	SNCM420	0.17-0.23	0.15-0.35	0.4-0.7	≦0.03	≦0.03	1.6-2.0	0.40-0.65	0.15-0.30	≦0.3
AISI	-	4320	0.17-0.22	0.15-0.30	0.45-0.65	≦0.035	≦0.04	1.65-2.00	0.4-0.6	0.2-0.3	-
CNS	3271	SNCM431	0.27-0.35	0.15-0.35	0.6-0.9	≦0.03	≦0.03	1.6-2.0	1.6-2.0	0.15-0.30	≦0.3
JIS	G4103	SNCM431	0.27-0.35	0.15-0.35	0.6-0.9	≦0.03	≦0.03	1.6-2.0	1.6-2.0	0.15-0.30	≦0.3
CNS	3271	SNCM439	0.36-0.43	0.15-0.35	0.6-0.9	≦0.03	≦0.03	1.6-2.0	0.6-1.0	0.15-0.30	≦0.3
GB	3077	40CrNiMoA	0.37-0.44	0.17-0.37	0.50-0.80	≦0.03	≦0.02	1.25-1.65	0.6-1.9	0.15-0.25	-
GB	3077	45CrNiMoVA	0.42-0.49	0.17-0.37	0.50-0.80	≦0.035	≦0.035	1.3-1.8	0.8-1.1	0.2-0.3	-
JIS	G4103	SNCM439	0.36-0.43	0.15-0.35	0.6-0.9	≦0.03	≦0.03	1.6-2.0	0.6-1.0	0.15-0.30	≦0.3
AISI	-	4340	0.38-0.43	0.15-0.35	0.6-0.8	≦0.035	≦0.04	1.5-2.0	0.7-0.9	0.2-0.3	-
AISI	-	9840	0.38-0.43	0.20-0.35	0.7-0.9	≦0.04	≦0.04	0.85-1.15	0.7-0.9	0.2-0.3	-
CNS	3271	SNCM447	0.44-0.50	0.15-0.35	0.6-0.9	≦0.03	≦0.03	1.6-2.0	0.6-1.0	0.15-0.30	≦0.3
JIS	G4103	SNCM447	0.44-0.50	0.15-0.35	0.6-0.9	≦0.03	≦0.03	1.6-2.0	0.6-1.0	0.15-0.30	≦0.3
AISI	-	4340	0.38-0.43	0.15-0.35	0.6-0.9	≦0.035	≦0.045	1.5-2.0	0.7-0.9	0.2-0.3	-
DIN	17200	34CrNiMo6	0.30-0.38	0.15-0.40	0.4-0.7	≦0.035	≦0.035	1.4-1.7	1.4-1.7	0.15-0.30	-
CNS	3271	SNCM616	0.13-0.20	0.15-0.35	0.8-1.2	≦0.03	≦0.03	2.8-3.2	1.4-1.8	0.4-0.6	≦0.3
JIS	G4103	SNCM616	0.13-0.20	0.15-0.35	0.8-1.2	≦0.03	≦0.03	2.8-3.2	1.4-1.8	0.4-0.6	≦0.3
DIN	17210	18CrNi8	0.15-0.20	0.15-0.40	0.4-0.6	≦0.035	≦0.035	1.8-2.1	1.0-2.1	-	-
CNS	3271	SNCM625	0.2-0.3	0.15-0.35	0.35-0.60	≦0.03	≦0.03	3.0-3.5	1.0-1.5	0.15-0.30	≦0.3
JIS	G4103	SNCM625	0.2-0.3	0.15-0.35	0.35-0.60	≦0.03	≦0.03	3.0-3.5	1.0-1.5	0.15-0.30	≦0.3
CNS	3271	SNCM630	0.25-0.35	0.15-0.35	0.35-0.60	≦0.03	≦0.03	2.5-3.5	2.5-3.5	0.5-0.7	≦0.3
JIS	G4103	SNCM630	0.25-0.35	0.15-0.35	0.35-0.60	≦0.03	≦0.03	2.5-3.5	2.5-3.5	0.5-0.7	≦0.3
DIN	17200	30CrNiMo8	0.26-0.33	0.15-0.40	0.15-0.40	≦0.035	≦0.035	1.8-2.2	1.8-2.2	0.3-0.5	-
CNS	3271	SNCM815	0.12-0.18	0.15-0.35	0.3-0.6	≦0.03	≦0.03	4.0-4.5	0.7-1.0	0.15-0.30	≦0.3
GB	3077	12CrNi3A	0.10-0.17	0.17-0.37	0.3-0.6	≦0.02	≦0.03	2.75-3.15	0.6-0.9	-	-
JIS	G4103	SNCM815	0.12-0.18	0.15-0.35	0.3-0.6	≦0.03	≦0.03	4.0-4.5	0.7-1.0	0.15-0.30	≦0.3