级别 | 抗拉强度,ksi(MPa) | 类别 |
A B C D | 515-655 550-690 550-690 550-690 | Mn-Mo Mn-Mo Mn-Mo-Ni Mn-Mo-Ni |
元素 | 成分,% | ||||
A级 | B级 | C级 | D级 | ||
C① | 厚度≤1in.(25mm) >1~2in.(50mm) >2in.(50mm) | ≤0.20 ≤0.23 ≤0.25 | ≤0.20 ≤0.23 ≤0.25 | ≤0.20 ≤0.23 ≤0.25 | ≤0.20 ≤0.23 ≤0.25 |
Mn | 熔炼分析 成品分析 | 0.95~1.30 0.87~1.41 | 1.51~1.50 1.07~1.62 | 1.51~1.50 1.07~1.62 | 1.51~1.50 1.07~1.62 |
P①≤ | 0.025 | 0.025 | 0.025 | 0.025 | |
S①≤ | 0.025 | 0.025 | 0.025 | 0.025 | |
Si | 熔炼分析 成品分析 | 0.15~0.40 0.13~0.45 | 0.15~0.40 0.13~0.45 | 0.15~0.40 0.13~0.45 | 0.15~0.40 0.13~0.45 |
Mo | 熔炼分析 成品分析 | 0.45~0.60 0.41~0.64 | 0.45~0.60 0.41~0.64 | 0.45~0.60 0.41~0.64 | 0.45~0.60 0.41~0.64 |
Ni | 熔炼分析 成品分析 | ... ... | ... ... | 0.40~0.70 0.37~0.73 | 0.70~1.00 0.67~1.03 |
项目 | A级 | B级 | C级 | D级 |
拉伸强度,ksi(MPa) | 75~95 (515~655) | 80~100 (550~690) | 80~100 (550~690) | 80~100 (550~690) |
屈服强度,ksi(MPa) | ≥45(310) | ≥50(345) | ≥50(345) | ≥50(345) |
伸长率,标距8in.(200mm),% | ≥15① | ≥15① | ≥17① | ≥17① |
伸长率,标距2in.(50mm),% | ≥19① | ≥18① | ≥20① | ≥20① |
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