Guangzhou Changfeng Steel Co., LTD
The Customer Satisfaction Is The Soul Of Enterprise.
Add to Cart
Pre-Harden 1.2312 P20+S Steel Plate of Plastic Mould Steel
1.2312/P20+S steel is ideally suited for the production of moulds where improved machinability is required. 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.
1. The main performance
It has excellent hardening depth and good machinability, Delivery to pre hardened and tempered condition, Sulfur content is higher than 1.2311. Can impose nitriding processing (about 800HV), plating Nickel or chrome.
2. Application:
Mainly used for the degree of thefamily which do not require extreme large plastic moulds, Used as a low melting point of die holder , mould base, etc.
3. Grade
| W.Nr | DIN | AFNOR | AISI/SAE | GB |
| 1.2312 | X40CrMnMoS8-6 | (40CMD8S) | P20+S | 4Cr2MnMo |
4. Chemical composition (%)
| C | Mn | Si | Cr | Mo | S | P |
| 0.35-0.45 | 1.40-1.60 | 0.30-0.50 | 1.80-2.10 | 0.15-0.25 | 0.05-0.10 | ≤0.030 |
5. Phase transition temperature
| Ac1 | 740°C |
| Ms | 310°C |
6. The hardness of delivery
| Prehardened 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 | 1)Heated to560-650°C and then two to four hours heat preservation 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. Delivery:
For abundant stock, 15-20 days.
For customized products, 30-50 days.
Warehous
Processing
Strict Quality Control