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牌号
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化 学 成
分 (质量分数)，%
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|
C(碳)
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Si(硅)
|
Mn(锰)
|
Cr(铬)
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Ni(镍)
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S(硫)
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P(磷)
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Cu(铜)
|
|
Q235
|
0.14～0.22
|
≤0.30
|
0.30～0.65
|
≤0.30
|
≤0.30
|
≤0.050
|
≤0.045
|
≤0.30
|
|
15
|
0.12～0.19
|
0.17～0.37
|
0.35～0.65
|
≤0.25
|
≤0.25
|
≤0.035
|
≤0.035
|
≤0.25
|
|
20
|
0.17～0.24
|
0.17～0.37
|
0.35～0.65
|
≤0.25
|
≤0.25
|
≤0.035
|
≤0.035
|
≤0.25
|
|
25
|
0.22～0.30
|
0.17～0.37
|
0.50～0.80
|
≤0.25
|
≤0.25
|
≤0.035
|
≤0.035
|
≤0.25
|
|
30
|
0.27～0.35
|
0.17～0.37
|
0.50～0.80
|
≤0.25
|
≤0.25
|
≤0.035
|
≤0.035
|
≤0.25
|
|
35
|
0.32～0.40
|
0.17～0.37
|
0.50～0.80
|
≤0.25
|
≤0.25
|
≤0.035
|
≤0.035
|
≤0.25
|
|
40
|
0.37～0.45
|
0.17～0.37
|
0.50～0.80
|
≤0.25
|
≤0.25
|
≤0.035
|
≤0.035
|
≤0.25
|
|
45
|
0.42～0.50
|
0.17～0.37
|
0.50～0.80
|
≤0.25
|
≤0.25
|
≤0.035
|
≤0.035
|
≤0.25
|
|
50
|
0.47～0.55
|
0.17～0.37
|
0.50～0.80
|
≤0.25
|
≤0.25
|
≤0.035
|
≤0.035
|
≤0.25
|
|
55
|
0.52～0.60
|
0.17～0.37
|
0.50～0.80
|
≤0.25
|
≤0.25
|
≤0.035
|
≤0.035
|
≤0.25
|
|
