GB 30584
GB 30584 (Seamless steel pipes for crane jib)· GB (China) · 3 materials
| Designation | Material group | |
|---|---|---|
| BJ450 | Structural and constructional steels | chevron_right |
| BJ770 | Structural and constructional steels | chevron_right |
| BJ890 | Structural and constructional steels | chevron_right |