GB/T 20659
GB/T 20659 (Petroleum and natural gas industries - Aluminium alloy drill pipe)· GB (China) · 4 materials
| Designation | Material group | |
|---|---|---|
| Al-Cu-Mg-I | Aluminium | chevron_right |
| Al-Cu-Mg-Si-Fe-III | Aluminium | chevron_right |
| Al-Zn-Mg-II | Aluminium | chevron_right |
| Al-Zn-Mg-IV | Aluminium | chevron_right |