元素 | 成分% | ||
C | 小于等于25mm | A | ≦0.26 |
B | ≦0.28 | ||
大于25mm | A | ≦0.28 | |
B | ≦0.30 | ||
Mn | 小于等于25mm | 熔炼分析 | 0.9-1.4 |
成品分析 | 0.84-1.52 | ||
大于25mm | 熔炼分析 | 0.9-1.5 | |
成品分析 | 0.84-1.62 | ||
P | ≦0.035 | ||
S | ≦0.035 | ||
Si | 熔炼分析 | 0.15-0.4 | |
成品分析 | 0.13-0.45 |
项目 | A级 | B级 | |
抗拉强度,Mpa | 515-655 | 550-690 | |
屈服强度,Mpa | 小于等于25mm | 290 | 325 |
大于25mm | 275 | 310 | |
伸长率,标距200mm,% | ≧16 | ≧16 | |
伸长率,标距50mm,% | ≧19 | ≧19 |
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