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| Material Designation | Standard | Same grade, different standards. | Source factory |
|---|---|---|---|
| 12MnNiVR | GB /T 19189-2003
Alloy Steel |
- | |
| 07MnNiMoVDR | GB /T 19189-2003
Alloy Steel |
- | |
| 07MnCrMoVR | GB /T 19189-2003
Alloy Steel |
- |