GOST 631
GOST 631 (Internal-external upset drill pipes with couplings. Specifications)· GOST (Russia) · 7 materials
| Designation | Alternative designation | Material group | |
|---|---|---|---|
| D | Д | Structural and constructional steels | chevron_right |
| E | Е | Structural and constructional steels | chevron_right |
| Grade K | К | Structural and constructional steels | chevron_right |
| Grade L | Л | Structural and constructional steels | chevron_right |
| Grade M | М | Structural and constructional steels | chevron_right |
| Grade R | Р | Structural and constructional steels | chevron_right |
| T | Т | Structural and constructional steels | chevron_right |