〔27〕机械构造用铝铬钼钢
（Aluminum Chromium Molybdenum Steels for Machine Structural use)
标准代号	规格号码	记号	化学成分（%)Chemical composition										拉伸试验 Tensile requirements
			C	Si	Mn	P	S	Ni	Cr	Mo	Al	Cu	厚度（mm)	降伏强度(Mpa)	抗拉强度(Mpa)	伸长度(%)
ASTM	A355	Class B	0.35-0.40	0.2-0.4	0.70-0.95	≦0.035	≦0.06	1.2-1.5	0.15-0.25	0.95-1.30	0.15-0.25	Se:0.15-0.25	-	-	-	-
DIN	17211	34CrAlS5	0.30-0.37	0.15-0.40	0.6-0.9	≦0.03	≦0.035	1.0-1.3	-	0.8-1.2	-	-	≦60	≧440	640-790	≧12
CNS	4444	SACM645	0.4-0.5	0.15-0.50	≦0.6	≦0.03	≦0.03	1.3-1.7	0.15-0.30	0.7-1.2	≦0.3	Ni≦0.25	-	-	-	-
JIS	G4202	SACM645	0.4-0.5	0.15-0.50	≦0.6	≦0.03	≦0.03	1.3-1.7	0.15-0.30	0.7-1.2	≦0.3	Ni≦0.25	-	-	-	-
ASTM	A355	Class D	0.33-0.38	0.2-0.4	0.5-0.7	≦0.035	≦0.04	1.0-1.3	0.15-0.23	0.95-1.30	-	-	-	-	-	-
DIN	17211	34CrAlMo5	0.30-0.27	0.2-0.5	0.5-0.8	≦0.03	≦0.035	1.0-1.3	0.15-0.25	0.8-1.2	-	-	≦70	≧590	780-980	≧14
CNS	4444	SACM645	0.4-0.5	0.15-0.50	≦0.6	≦0.03	≦0.03	1.3-1.7	0.15-0.30	0.7-1.2	≦0.3	-	-	-	-	-
JIS	G4202	SACM645	0.4-0.5	0.15-0.50	≦0.6	≦0.03	≦0.03	1.3-1.7	0.15-0.30	0.7-1.2	≦0.3	Ni≦0.25	-	-	-	-
ASTM	A355	Class A	0.38-0.43	0.15-0.35	0.5-0.7	≦0.035	≦0.04	1.4-1.8	0.3-0.4	0.95-1.30	-	-	-	-	-	-
DIN	17211	41CrAlMo7	0.38-0.45	0.2-0.5	0.5-0.8	≦0.03	≦0.025	1.5-1.8	0.25-0.40	0.8-1.2	-	-	≦100	≦735	930-1130	≧12