元素 | 炼钢分析,% | ||||
A级 | B级 | C级 | D级 | ||
C,≤ | 0.14 | 0.17 | 0.24 | 0.27 | |
Mn,≤ | 0.90 | 0.90 | 0.90 | 0.90 | |
P,≤ | 0.035 | 0.035 | 0.035 | 0.035 | |
S,≤ | 0.04 | 0.04 | 0.04 | 0.04 | |
Si | 钢板,≤1.5in.(40mm) | 0.40 | 0.40 | 0.40 | 0.40 |
钢板,>1.5in.(40mm) | 0.15~0.40 | 0.15~0.40 | 0.15~0.40 | 0.15~0.40 | |
Cu,≥(当规定含Cu时) | 0.20 | 0.20 | 0.20 | 0.20 |
项目 | A级 | B级 | C级 | D级 |
抗拉强度,ksi(MPa) | 45~60(310~415) | 45~60(345~450) | 55~75(380~515) | 60~80(415~550) |
屈服点,≥qufudia | 24(165) | 27(185) | 30(205) | 33(230) |
伸长率,标距8in.(200mm),≥,% | 27 | 25 | 22 | 20 |
伸长率,标距2in.(50mm),≥,% | 30 | 28 | 25 | 23 |
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