標(biāo)準(zhǔn) 牌號(hào) 化學(xué)成分(%) C Si Mn P S GB/T5312 320 ≤0.16 ≤0.35 0.40~0.70 ≤0.035 ≤0.035 360 ≤0.17 ≤0.35 0.40~0.80 ≤0.035 ≤0.035 410 ≤0.21 ≤0.35 0.40~1.20 ≤0.035 ≤0.035 460 ≤0.22 ≤0.35 0.80~1.40 ≤0.035 ≤0.030 490 ≤0.23 ≤0.35 0.80~1.50 ≤0.035 ≤0.030 注:殘余元素Cr≤0.25%,Mo≤0.10%,Ni≤0.30%,Cu≤0.30%總量≤0.70%
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