1.2312 Steel is a high quality plastic tool mold steel by add about 0.08% Sulphur on the 1.2311 improve free cutting ability of 1.2311 tool steel . It belongs to the high quality medium carbon, Pre-hardness(28~34HRc) plastic mould steel. It needn’t further Make heat treatment for make plasitc injection moulding.
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2, Long life and large plastic injection mold products such as home appliance, computer shell mold;
3, Thermoplastic plastic extrusion die;
4, Blow molding mold and Molding tool; 3, Grade | W.Nr | DIN | AFNOR | AISI/SAE |
| 1.2312 | X40CrMnMoS8-6 | (40CMD8S) | P20+S |
4, Chemical composition(%) | C | Mn | Si | Cr | Mo | Ni | S+P |
| 0.35-0.45 | 0.8-1.0 | 0.30-0.50 | 1.80-2.00 | 0.35-0.38 | 0.05-0.10 | 0.015 |
5, Phase transition temperature 6, The hardness of delivery | Pre hardened and tempered | HB278-325(950-1100N/mm²) |
7, Heat treatment | Annealing | 1)Heated to720-750°C,Two to four hours heat preservation,
2)Furnace cooling |
| Stress relief | Preservation 1)Heated to560-650°C and then two to four hours heat 2)Furnace cooling or air cooling |
| Pre hardened | 1)Preheat to 600-650°C
2)Heated to hardening temperature 840-840°C and heat preservation
3)Oil cooling
4)Hardness:HRC51 |
| Drawing temper | 1)Immediately after quenching
2)When the 580-650°C,with the 1/inch to heat preservation |
8, Packing:Standard export packing or according to customers' request.
9. Stock Sizes:
Plate | Thickness | 8-300mm |
| Width | 2000-2200mm |
| Length | 2000-8000mm |
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