〔50〕结构用高强度碳钢及低合金铸件
（ High Tensile Carbon Steel Castings and Low Alloy Steel Castings for Structural)
标准代号	规格号码	记号	化学成分（%)Chemical composition								拉伸试验 Tensile requirements				硬度（HB)
			C	Si	Mn	P	S	Ni	Cr	Mo	降伏强度(Mpa)	抗拉强度(Mpa)	伸长度(%)	热处理
CNS	7145	SCC3A	0.3-0.4	0.3-0.6	0.5-0.8	≦0.04	≦0.04	-	-	-	≧265	≧520	≧13	N+T	≧143
JIS	G5111	SCC3A	0.3-0.4	0.3-0.6	0.5-0.8	≦0.04	≦0.04	-	-	-	≧265	≧520	≧13	N+T	≧143
ASTM	A148	80-40	-	-	-	≦0.05	≦0.05	-	-	-	≧275	≧550	≧18	-	-
DIN	1681	GS-60	0.4	0.3-0.6	0.2-0.5	≦0.04	≦0.04	-	-	-	≧300	≧600	≧15	-	-
CNS	7145	SCC3B	0.3-0.4	0.3-0.6	0.5-0.8	≦0.04	≦0.04	-	-	-	≧131	≧370	≧620	Q+T	≧183
JIS	G5111	SCC3B	0.3-0.4	0.3-0.6	0.5-0.8	≦0.04	≦0.04	-	-	-	≧131	≧370	≧620	Q+T	≧183
DIN	1681	GS-60	0.4	0.3-0.6	0.2-0.5	≦0.04	≦0.04	-	-	-	≧300	≧600	≧15	-	-
CNS	7145	SCC5A	0.4-0.5	0.3-0.6	0.5-0.8	≦0.04	≦0.04	-	-	-	≧295	≧620	≧9	N+T	≧163
JIS	G5111	SCC5A	0.4-0.5	0.3-0.6	0.5-0.8	≦0.04	≦0.04	-	-	-	≧295	≧620	≧9	N+T	≧163
DIN	1681	GS-70	0.5	0.3-0.6	0.2-0.5	≦0.05	≦0.05	-	-	-	-	-	-	-	-
CNS	7145	SCC5B	0.4-0.5	0.3-0.6	0.5-0.8	≦0.04	≦0.04	-	-	-	≧275	≧690	≧9	Q+T	≧201
JIS	G5111	SCC5B	0.4-0.5	0.3-0.6	0.5-0.8	≦0.04	≦0.04	-	-	-	≧275	≧690	≧9	Q+T	≧201
DIN	1681	GS-70	0.5	0.3-0.6	0.2-0.5	≦0.05	≦0.05	-	-	-	-	-	-	-	-
CNS	7145	SCMn1A	0.2-0.3	0.3-0.6	1.0-1.6	≦0.04	≦0.04	-	-	-	≧275	≧540	≧17	N+T	≧143
JIS	G5111	SCMn1A	0.2-0.3	0.3-0.6	1.0-1.6	≦0.04	≦0.04	-	-	-	≧275	≧540	≧17	N+T	≧143
DIN	1681	28Mn6	0.25-0.32	≦0.4	1.30-1.65	≦0.035	≦0.035	≦0.4	≦0.4	≦0.1	≧440	640-790	≧16	-	≦223
CNS	7145	SCMn1B	0.2-0.3	0.3-0.6	1.0-1.6	≦0.04	≦0.04	-	-	-	≧390	≧590	≧17	Q+T	≧170
JIS	G5111	SCMn1B	0.2-0.3	0.3-0.6	1.0-1.6	≦0.04	≦0.04	-	-	-	≧390	≧590	≧17	Q+T	≧170
ASTM	A148	90-60	-	-	-	≦0.05	≦0.06	-	-	-	≧415	≧620	≧20	-	-
DIN	1681	28Mn6	0.25-0.32	≦0.4	1.30-1.65	≦0.035	≦0.035	≦0.4	≦0.4	≦0.1	≧440	640-790	≧16	-	≦223
CNS	7145	SCMn2A	0.25-0.35	0.3-0.6	1.0-1.6	≦0.04	≦0.04	-	-	-	≧345	≧590	≧16	N+T	≧163
JIS	G5111	SCMn2A	0.25-0.35	0.3-0.6	1.0-1.6	≦0.04	≦0.04	-	-	-	≧345	≧590	≧16	N+T	≧163
DIN	1681	GS-30Mn5	0.27-0.34	0.3-0.50	1.2-1.5	≦0.035	≦0.035	-	-	-	-	-	-	-	-
CNS	7145	SCMn2B	0.25-0.35	0.3-0.6	1.0-1.6	≦0.04	≦0.04	-	-	-	≧440	≧640	≧16	-	≧183
JIS	G5111	SCMn2B	0.25-0.35	0.3-0.6	1.0-1.6	≦0.04	≦0.04	-	-	-	≧440	≧640	≧16	-	≧183
ASTM	A148	90-60	-	-	-	≦0.05	≦0.06	-	-	-	≧415	≧620	≧20	-	-
DIN	1681	GS-30Mn5	0.27-0.34	0.3-0.50	1.2-1.5	≦0.035	≦0.035	-	-	-	-	-	-	-	-
CNS	7145	SCMn3A	0.3-0.4	0.3-0.6	1.0-1.6	≦0.04	≦0.04	-	-	-	≧370	≧640	≧13	N+T	≧170
JIS	G5111	SCMn3A	0.3-0.4	0.3-0.6	1.0-1.6	≦0.04	≦0.04	-	-	-	≧370	≧640	≧13	N+T	≧170
DIN	1681	GS-36Mn5	0.32-0.40	0.15-0.35	1.2-1.5	≦0.035	≦0.035	-	-	-	-	-	-	-	-
CNS	7145	SCMnM3B	0.3-0.4	0.3-0.6	1.0-1.6	≦0.04	≦0.04	-	-	-	≧490	≧740	≧13	Q+T	≧212
JIS	G5111	SCMnM3B	0.3-0.4	0.3-0.6	1.0-1.6	≦0.04	≦0.04	-	≦0.2	0.15-0.35	≧490	≧740	≧13	Q+T	≧212
CNS	7145	SCMn5A	0.4-0.5	0.3-0.6	1.0-1.6	≦0.04	≦0.04	-	-	-	≧390	≧690	≧9	N+Q	≧183
JIS	G5111	SCMn5A	0.4-0.5	0.3-0.6	1.0-1.6	≦0.04	≦0.04	-	-	-	≧390	≧690	≧9	N+Q	≧183
DIN	1681	GS-46Mn4	0.42-0.50	0.25-0.50	0.9-1.2	≦0.035	≦0.035	-	-	-	-	-	-	-	-
CNS	7145	SCMn5B	0.4-0.5	0.3-0.6	1.0-1.6	≦0.04	≦0.04	-	-	-	≧540	≧740	≧9	Q+T	≧212
JIS	G5111	SCMn5B	0.4-0.5	0.3-0.6	1.0-1.6	≦0.04	≦0.04	-	-	-	≧540	≧740	≧9	Q+T	≧212
DIN	1681	GS-46Mn4	0.42-0.50	0.25-0.50	0.9-1.2	≦0.035	≦0.035	-	-	-	-	-	-	-	-
CNS	7145	SCMnCr-M2A	0.25-0.35	0.3-0.6	1.2-1.6	≦0.04	≦0.04	-	0.3-0.7	0.15-0.35	≧440	≧690	≧13	N+T	≧201
JIS	G5111	SCMnCr-M2A	0.25-0.35	0.3-0.6	1.2-1.6	≦0.04	≦0.04	-	0.3-0.7	0.15-0.35	≧440	≧690	≧13	N+T	≧201
CNS	7145	SCMnCr-M2B	0.25-0.35	0.3-0.6	1.2-1.6	≦0.04	≦0.04	-	0.3-0.7	0.15-0.35	≧540	≧740	≧13	-	≧212
JIS	G5111	SCMnCr-M2B	0.25-0.35	0.3-0.6	1.2-1.6	≦0.04	≦0.04	-	0.3-0.7	0.15-0.35	≧540	≧740	≧13	-	≧212
CNS	7145	SCMnCr-M3A	0.3-0.4	0.3-0.6	1.2-1.6	≦0.04	≦0.04	-	0.3-0.7	0.15-0.35	≧540	≧740	≧9	N+T	≧212
JIS	G5111	SCMnCr-M3A	0.3-0.4	0.3-0.6	1.2-1.6	≦0.04	≦0.04	-	0.3-0.7	0.15-0.35	≧540	≧740	≧9	N+T	≧212
CNS	7145	SCMnCr-M3B	0.3-0.4	0.3-0.6	1.2-1.6	≦0.04	≦0.04	-	0.3-0.7	0.15-0.35	≧635	≧830	≧9	Q+T	≧223
JIS	G5111	SCMnCr-M3B	0.3-0.4	0.3-0.6	1.2-1.6	≦0.04	≦0.04	-	0.3-0.7	0.15-0.35	≧635	≧830	≧9	Q+T	≧223
ASTM	A148	115-95	-	-	-	≦0.05	≦0.06	-	-	-	≧655	≧795	≧14	-	-
CNS	7145	SCCrM3A	0.3-0.4	0.3-0.6	0.5-0.8	≦0.04	≦0.04	-	0.8-1.2	0.15-0.35	≧440	≧690	≧9	N+T	≧201
JIS	G5111	SCCrM3A	0.3-0.4	0.3-0.6	0.5-0.8	≦0.04	≦0.04	-	0.8-1.2	0.15-0.35	≧440	≧690	≧9	N+T	≧201
DIN	1681	GS-34CMo4	0.30-0.37	0.3-0.5	0.5-0.8	≦0.035	≦0.035	-	0.8-1.2	0.2-0.3	-	-	-	-	-
CNS	7145	SCCrM3B	0.3-0.4	0.3-0.6	0.5-0.8	≦0.04	≦0.04	-	0.8-1.2	0.15-0.35	≧540	≧740	≧9	Q+T	≧217
JIS	G5111	SCCrM3B	0.3-0.4	0.3-0.6	0.5-0.8	≦0.04	≦0.04	-	0.8-1.2	0.15-0.35	≧540	≧740	≧9	Q+T	≧217
ASTM	A148	105-85	-	-	-	≦0.05	≦0.06	-	0.8-1.2	-	≧585	≧725	≧17	-	-
CNS	7145	SCSiMn2A	0.25-0.35	0.5-0.8	0.9-1.2	≦0.04	≦0.04	-	-	-	≧295	≧590	≧13	N+T	≧163
JIS	G5111	SCSiMn2A	0.25-0.35	0.5-0.8	0.9-1.2	≦0.04	≦0.04	-	-	-	≧295	≧590	≧13	N+T	≧163
CNS	7145	SCSiMn2B	0.25-0.35	0.5-0.8	0.9-1.2	≦0.04	≦0.04	-	-	-	≧440	≧640	≧17	Q+T	≧183
JIS	G5111	SCSiMn2B	0.25-0.35	0.5-0.8	0.9-1.2	≦0.04	≦0.04	-	-	-	≧440	≧640	≧17	Q+T	≧183
CNS	7145	SCNCr-M2A	0.25-0.35	0.3-0.6	0.9-1.5	≦0.04	≦0.04	1.6-2.0	0.3-0.9	0.15-0.35	≧590	≧785	≧9	N+T	≧223
JIS	G5111	SCNCr-M2A	0.25-0.35	0.3-0.6	0.9-1.5	≦0.04	≦0.04	1.6-2.0	0.3-0.9	0.15-0.35	≧590	≧785	≧9	N+T	≧223
CNS	7145	SCNCr-M2B	0.25-0.35	0.3-0.6	0.9-1.5	≦0.04	≦0.04	1.6-2.0	0.3-0.9	0.15-0.35	≧686	≧880	≧9	Q+T	≧269
JIS	G5111	SCNCr-M2B	0.25-0.35	0.3-0.6	0.9-1.5	≦0.04	≦0.04	1.6-2.0	0.3-0.9	0.15-0.35	≧686	≧880	≧9	Q+T	≧269