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优质碳素钢热轧(GB/T)
牌号 |
C |
Si |
Mn |
P |
S |
Cr |
Ni |
Cu |
45 |
0.42-0.50 |
0.17-0.37 |
0.50-0.80 |
≤0.035 |
≤0.035 |
≤0.25 |
≤0.30 |
≤0.25 |
55 |
0.52-0.60 |
0.17-0.37 |
0.50-0.80 |
≤0.035 |
≤0.035 |
≤0.25 |
≤0.30 |
≤0.25 |
60 |
0.57-0.65 |
0.17-0.37 |
0.50-0.80 |
≤0.035 |
≤0.035 |
≤0.25 |
≤0.30 |
≤0.25 |
65 |
0.62-0.70 |
0.17-0.37 |
0.50-0.80 |
≤0.035 |
≤0.035 |
≤0.25 |
≤0.30 |
≤0.25 |
70 |
0.67-0.75 |
0.17-0.37 |
0.50-0.80 |
≤0.035 |
≤0.035 |
≤0.25 |
≤0.30 |
≤0.25 |
80 |
0.77-0.85 |
0.17-0.37 |
0.50-0.80 |
≤0.035 |
≤0.035 |
≤0.25 |
≤0.30 |
≤0.25 |
65Mn |
0.62-0.70 |
0.17-0.37 |
0.90-1.20 |
≤0.030 |
≤0.030 |
≤0.25 |
≤0.25 |
≤0.25 |
注：所有元素单位为%。
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