優(yōu)碳鋼、低合金鋼管的縱向力學(xué)性能
|
牌號(hào) |
抗拉強(qiáng)度ób／MPa |
屈服點(diǎn)ós/MPa |
斷后伸長(zhǎng)率δ5(％) |
壓扁試驗(yàn)
平板間距
H/mm |
|
鋼管壁厚 |
|
≤16m |
>16-30mm |
>30mm |
|
≥ |
|
10 |
335 |
205 |
195 |
185 |
24 |
2／3D |
|
20 |
390 |
245 |
235 |
225 |
20 |
2／3D |
|
35 |
510 |
305 |
295 |
285 |
17 |
|
|
45 |
590 |
335 |
325 |
315 |
14 |
|
|
Q345B |
490 |
325 |
315 |
305 |
21 |
7／8D |
|
