Guangzhou Changfeng Steel Co., LTD
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Product Description Details
1.2312 tool steel is ideally suited for the production of moulds where improved machinability is required. Typical applications include die holders, zinc die casting dies, backers, bolsters and injection moulds.
The versatility of this plastic mould tool steel with its high tensile characteristics enables uses for a variety of other applications such as shafts and wear strips.
Pre-hardened hardness: 28-32 HRC
1, Grade
| W.Nr | DIN | AFNOR | AISI/SAE |
| 1.2312 | 40CrMnMoS8-6 | (40CMD8S) | P20+S |
2, Application:
1) Used for plastic mould, good polish with corrosion-resisting;
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, Features:
1) Alloy tool steel which offers good machineability;
2) Excellent polished finish for large section;
3) Supplied in the hardened and tempered condition ready for machining;
4) In this condition it gives excellent wear resistance.
4, Chemical composition(%)
| C | Mn | Si | Cr | Mo | Ni | S+P |
| 0.28-0.40 | 0.6-1.0 | 0.20-0.80 | 1.40-2.00 | 0.30-0.55 | 0.05-0.10 | ≤0.03 |
5, Phase transition temperature
| Ac1 | 740°C |
| Ms | 310°C |
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. About Changfeng Steel
We are a mould steel stockist, main products are plastic mold steel, hot work mould steel, cold work mould steel, alloy steel for mechanical, high speed steel,etc.
We provide high quality products with competitive price, also we arrange fast shipment to satisfy all of our customers.
We are here waiting for a cooperation chance between us, contact us and you will have one more loyal mold steel supplier!
10. The reasons to choose us
1) Competitive price and high quality
2) Accept OEM / ODM orders
3) Smooth production ability(1000tons/month)
4) Approved by ISO9001, CE, SGS every year
5) Quick delivery and standard exporting package
6) Flexible payment with T/T, L/C
7) service with 24 hours reply
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