牌号 | C | Si | Mn | P | S |
SM490A |
厚度≤50mm,≤0.2。 >50-200mm,≤0.22 |
≤0.55 | ≤1.6 | ≤0.035 | ≤0.035 |
SM490B |
厚度≤50mm,≤0.18。 >50-200mm,≤0.2 |
≤0.55 | ≤1.6 | ≤0.035 | ≤0.035 |
SM490C | 厚度≤100mm,≤0.18 | ≤0.55 | ≤1.6 | ≤0.035 | ≤0.035 |
牌号 | SM490A,SM490B,SM490C | |
适用厚度 | ≤50mm | ≤0.24 |
>50-100mm | ≤0.26 |
牌号 | 试验温度,℃ | 夏比冲击吸收功,J |
SM490B | 0 | ≥27 |
SM490C | 0 | ≥47 |
厚度 | 屈服强度 | 抗拉强度 | 延伸率% |
≤16mm | ≥325Mpa | 490-610MPa | ≥17 |
>16-40mm | ≥315Mpa | ≥21 | |
>40mm | ≥295Mpa | ≥23 |