|
牌号 |
抗拉强度ób／MPa |
屈服点ós/MPa |
断后伸长率δ5(％) |
压扁试验
平板间距
H/mm | ||
|
钢管壁厚 | ||||||
|
≤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 |
|
|
Q345 |
490 |
325 |
315 |
305 |
21 |
7／8D |