GB/T 30829
GB/T 30829 (Shaped and round seamless steel tubes for oil derrick)· GB (China) · 16 materials
| Designation | Material group | |
|---|---|---|
| J20CrMo Grade I | Structural and constructional steels | chevron_right |
| J20CrMo Grade II | Structural and constructional steels | chevron_right |
| JQ245 Grade B | Structural and constructional steels | chevron_right |
| JQ245 Grade C | Structural and constructional steels | chevron_right |
| JQ245 Grade D | Structural and constructional steels | chevron_right |
| JQ245 Grade E | Structural and constructional steels | chevron_right |
| JQ345 Grade B | Structural and constructional steels | chevron_right |
| JQ345 Grade C | Structural and constructional steels | chevron_right |
| JQ345 Grade D | Structural and constructional steels | chevron_right |
| JQ345 Grade E | Structural and constructional steels | chevron_right |
| JQ450 Grade C | Structural and constructional steels | chevron_right |
| JQ450 Grade D | Structural and constructional steels | chevron_right |
| JQ450 Grade E | Structural and constructional steels | chevron_right |
| JQ500 Grade C | Structural and constructional steels | chevron_right |
| JQ500 Grade D | Structural and constructional steels | chevron_right |
| JQ500 Grade E | Structural and constructional steels | chevron_right |