GB/T 12227
GB/T 12227 (General purpose industrial valves - Technical specification for ductile iron castings)· GB (China) · 6 materials
| Designation | Material group | |
|---|---|---|
| QT 500-7 | Cast irons | chevron_right |
| QT400-15 | Cast irons | chevron_right |
| QT400-18 | Cast irons | chevron_right |
| QT400-18L | Cast irons | chevron_right |
| QT400-18R | Cast irons | chevron_right |
| QT450-10 | Cast irons | chevron_right |