1 大型铸件用低合金铸钢的牌号及化学成分 (摘自JB/T 6402—1992) 牌 号 化学成分(质量分数),% C(碳) Si(硅) Mn(锰) P(磷),S(硫) Cr(铬) Ni(镍) Mo(钼) Cu (铜) ZG30Mn 0.27~0.34 0.30~0.50 1.20~1.50 ≤0.035 — — — — ZG40Mn 0.35~0.45 0.30~0.45 1.20~1.50 ≤0.035 — — — — ZG40Mn2 0.35~0.45 0.20~0.40 1.60~1.80 ≤0.035 — — — — ZG50Mn2 0.45~0.55 0.20~0.40 1.50~1.80 ≤0.035 — — — — ZG20Mn (ZG20SiMn) 0.12~0.22 0.60~0.80 1.00~1.30 ≤0.035 — ≤0.40 — — ZG35Mn (ZG35SiMn) 0.30~0.40 0.60~0.80 1.10~1.40 ≤0.035 — — — — ZG35SiMnMo 0.32~0.40 1.10~1.40 1.10~1.40 ≤0.035 — 0.20~0.30 ≤0.30 ZG35CrMnSi 0.30~0.40 0.50~0.75 0.90~1.20 ≤0.035 0.50~0.80 — — — ZG20MnMo 0.17~0.23 0.20~0.40 1.10~1.40 ≤0.035 — — 0.20~0.35 ≤0.30 ZG55CrMnMo (ZG5CrMnMo) 0.50~0.60 0.25~0.60 1.20~1.60 ≤0.035 0.60~0.90 — 0.20~0.30 ≤0.30 ZG40Cr1 (ZG40Cr) 0.35~0.45 0.20~0.40 0.50~0.80 ≤0.035 0.80~1.10 — — — ZG34Cr2Ni2Mo (ZG34CrNiMo) 0.30~0.37 0.30~0.60 0.60~1.00 ≤0.035 1.40~1.70 1.40~1.70 0.15~0.35 — ZG20CrMo 0.17~0.25 0.20~0.45 0.50~0.80 ≤0.035 0.50~0.80 — 0.40~0.60 — ZG35Cr1Mo (ZG35CrMo) 0.30~0.37 0.30~0.50 0.50~0.80 ≤0.035 0.80~1.20 — 0.20~0.30 — ZG42Cr1Mo (ZG42CrMo) 0.38~0.45 0.30~0.60 0.60~1.00 ≤0.035 0.80~1.20 — 0.20~0.30 — ZG50Cr1Mo (ZG50CrMo) 0.46~0.54 0.25~0.50 0.50~0.80 ≤0.035 0.90~1.20 — 0.15~0.25 — ZG65Mn 0.62~0.70 0.17~0.37 0.90~1.20 ≤0.035 — — — — ZG28NiCrMo 0.25~0.30 0.30~0.80 0.60~0.90 ≤0.035 0.35~0.85 0.40~0.80 0.35~0.55 — 2 ZG30NiCrMo 0.25~0.35 0.30~0.60 0.70~1.00 ≤0.035 0.60~0.90 0.60~1.00 0.35~0.50 — ZG35NiCrMo 0.30~0.37 0.60~0.90 0.70~1.00 ≤0.035 0.40~0.90 0.60~0.90 0.40~0.50 — (1) 中国GB 标准一般工程用碳素铸钢|[GB/T 11352—1989] a. 一般工程用碳素铸钢的...