级别U、S(SI) | 抗拉强度,ksi(MPa) |
60(415) | 60-80(415-550) |
65(450) | 65-85(450-585) |
70(485) | 70-90(485-620) |
厚度(mm) | C | Mn | P | S | Si |
≤25 | ≤0.24 | ≤0.90 | ≤0.035 | ≤0.035 | 0.15-0.40 |
25-50 | ≤0.27 | ≤0.90 | ≤0.035 | ≤0.035 | 0.15-0.40 |
50-100 | ≤0.29 | ≤0.90 | ≤0.035 | ≤0.035 | 0.15-0.40 |
100-200 | ≤0.31 | ≤0.90 | ≤0.035 | ≤0.035 | 0.15-0.40 |
>200 | ≤0.31 | ≤0.90 | ≤0.035 | ≤0.035 | 0.15-0.40 |
钢种 | 屈服强度MPa | 抗拉强度MPa | 伸长率标距8in(200mm),% | 伸长率标距8in(50mm),% |
SA515Gr60 | ≥220 | 485-620 | ≥17 | ≥21 |