碳C:0.32~0.40;铬Cr:≤0.25;锰Mn:0.70~1.00;镍Ni:≤0.25;磷P:≤0.035;硫S:≤0.035;硅Si:0.17~0.37
铬Cr:≤0.25;锰Mn:0.70~1.00;镍Ni:≤0.25;磷P:≤0.035;硫S:≤0.035;硅Si:0.17~0.37
Mn 40-70% Si 17-37% C 32-40% S 小于等于3.5% P 小于等于3.5%
GB/T 688-1988
C:0.17-0.24
Si:0.17-0.37
Mn:0.35-0.65
S:<=0.035
P:<=0.035
Cr:<=0.25
Ni:<=0.25
Cu:<=0.25