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- 代号与类型 (3)
序号指标范围值单位说明
|
1 | Si ( Si ) | ≤ 0.15 | % | |
2 | Mn ( Mn ) | 0.8 ~ 1.2 | % | |
3 | C ( C ) | 0.1 ~ 0.18 | % | |
4 | S ( S ) | 0.23 ~ 0.33 | % | |
5 | P ( P ) | 0.05 ~ 0.1 | % | |
序号指标范围值单位说明
|
试样方向为纵向 *;状态为热轧时 |
1 | 抗拉强度 ( σb ) | 390 ~ 540 | Mpa | |
2 | 伸长率(短试样) ( δ5 ) | ≥ 22 | % | |
3 | 断面收缩率 ( ψ ) | ≥ 36 | % | |
状态为热轧时 |
1 | 布氏硬度W ( HBW ) | ≤ 170 | | |
钢材尺寸为8 ~ 20mm;状态为冷拉时 |
1 | 抗拉强度 ( σb ) | 530 ~ 755 | Mpa | |
钢材尺寸为20 ~ 30mm;状态为冷拉时 |
1 | 抗拉强度 ( σb ) | 510 ~ 735 | Mpa | |
钢材尺寸为≥ 30mm;状态为冷拉时 |
1 | 抗拉强度 ( σb ) | 490 ~ 685 | Mpa | |
状态为冷拉时 |
1 | 伸长率(短试样) ( δ5 ) | ≥ 7 | % | |
2 | 布氏硬度W ( HBW ) | 152 ~ 217 | | |
序号指标范围值单位说明
|
1 | ISC ( ISC ) | U71152 | | |
2 | ISC ( ISC ) | U71152 | | |
3 | ISC ( ISC ) | U71152 | | |
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