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| 1.2767 steel flats | ||||||||
| Chemical Composition(%) | ||||||||
| C | Si | Mn | P | S | Cr | Mo | Ni | W |
| 0.40-0.50 | 0.10-0.40 | 0.15-0.45 | ≤0.030 | ≤0.030 | 1.20-1.50 | 0.15-0.35 | 3.80-4.30 | 0.40-0.60 (OPTIONAL) |
| Specialty | ||||||||
1.High toughness of mold steel for oil and gas quenching | ||||||||
2.Good hardenability | ||||||||
| 3.A small amount of quenching distortion | ||||||||
| 4.Excellent polishing performance | ||||||||
| Use | ||||||||
| 1.Heavy-duty high toughness pressure dies | ||||||||
| 2.Required high stress forming dies | ||||||||
| 3.Heavy cold work tools | ||||||||
| 4.Shear tools | ||||||||
| 5.Required high hardness and high toughness plastic mold | ||||||||
| Heat Treatment | ||||||||
| 1.Quench: 840-870°c oil or air cooling | ||||||||
| 2.Tempering temperature: 160~250 °c | ||||||||
| 3. Hardness: 56HRC | ||||||||
| Melting Process | ||||||||
| 1. EAF: Electric Furnace+LF+VD(Optional) | ||||||||
| 2. ESR: Electric Furnace+LF+VD+Eleroslag Remelted(Optional) | ||||||||
| UT Class | ||||||||
| According to Standard of SEP 1921/84,100% Volume, Level C/c, D/d or E/e | ||||||||
| Tolerance on Quantity | ||||||||
| +/-10% Per Size | ||||||||