〔24〕机械构造用铬锰钢
（Manganese Chromium Steel 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	Cu	降伏强度(Mpa)	抗拉强度(Mpa)	伸长度(%)
GB	3077	15CrMn	0.12-0.18	0.17-0.37	1.1-1.4	≦0.035	≦0.03	≦0.3	0.4-0.7	≦0.3	≧590	≧785	≧12
AISI	-	5115	0.13-0.16	0.15-0.30	0.7-0.9	≦0.035	≦0.04	-	0.4-0.9	-	-	-	-
DIN	17210	16MnCr5	0.14-0.19	0.15-0.40	1.0-1.3	≦0.035	≦0.035	-	0.8-1.1	-	-	-	-
CNS	4445	SMnC420	0.17-0.23	0.15-0.35	1.2-1.5	≦0.03	≦0.03	≦0.25	0.35-0.70	≦0.3	-	-	-
GB	3077	20CrMn	0.17-0.23	0.17-0.37	0.9-1.2	≦0.035	≦0.035	-	0.9-1.2	-	≧735	≧930	≧10
JIS	4106	SMnC420	0.17-0.23	0.15-0.35	1.2-1.5	≦0.03	≦0.03	≦0.25	0.35-0.70	≦0.3	-	-	-
AISI	-	5120	0.17-0.22	0.15-0.30	0.7-0.9	≦0.035	≦0.04	-	-	-	-	-	-
DIN	17210	20MnCr5	0.17-0.22	≦0.4	1.0-1.4	≦0.035	≦0.035	-	1.0-1.3	-	-	-	-
GB	3077	20CrMnSi	0.17-0.23	0.9-1.2	0.8-1.1	≦0.035	≦0.035	-	0.8-1.1	-	≧635	≧785	≧12
GB	3077	30CrMnSi	0.27-0.34	0.9-1.2	0.8-1.1	≦0.035	≦0.035	≦0.3	0.8-1.1	≦0.3	≧885	≧1080	≧10
GB	3077	35CrMnSiA	0.32-0.39	1.1-1.4	0.8-1.1	≦0.035	≦0.035	-	1.1-1.4	-	≧1280	≧1620	≧9