GB/T 3639
GB/T 3639 (Seamless cold-drawn or cold-rolled steel tubes for precision applications)· GB (China) · 14 materials
| Designation | Material group | |
|---|---|---|
| 10 | Structural and constructional steels | chevron_right |
| 16Mn | Structural and constructional steels | chevron_right |
| 20 | Structural and constructional steels | chevron_right |
| 25CrMo | Structural and constructional steels | chevron_right |
| 25Mn | Structural and constructional steels | chevron_right |
| 35 | Structural and constructional steels | chevron_right |
| 42CrMo | Structural and constructional steels | chevron_right |
| 45 | Structural and constructional steels | chevron_right |
| Q345B | Structural and constructional steels | chevron_right |
| Q355B | Structural and constructional steels | chevron_right |
| Q420B | Structural and constructional steels | chevron_right |
| U20202 | Structural and constructional steels | chevron_right |
| U20352 | Structural and constructional steels | chevron_right |
| U20452 | Structural and constructional steels | chevron_right |