
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
Guangzhou Changfeng Steel Co., LTD
Guangzhou ChangFeng Steel Co., Ltd. is a professional special steel company, which specialized in exporting mould steel products based in China.With twenty years experience in special steel industry, our main products are Plastic Mould Steel, Hot Work Mould Steel, Cold Work Mould Steel, Alloy Structural Steel, Tool Steel, Stainless Steel, Carbon Steel and Forged Block.
To ensure provide high quality products to customers, we have close cooperation with many Chinese first class special steel enterprises, including Baosteel Group, Dongbei Special Steel, Changcheng Special Steel, Hongsheng Heavy Industry, Xingcheng Special Steel, Daye Special Steel. We have thousand tons of stock materials in our own factory and also can provide processing services to customers. We are full of export experience for many years, the product covers America, Germany, France, Italy, Turkey, Singapore, Thailand, Malaysia, Vietnam, Taiwan, and Middle-East.
After years of development, the company has established a complete quality management and export service system. We have a group of experienced and competent elites and is capable of offering the best service to clients. Our company equips with large-sized Vertical saw machines, Horizontal saw machines, Milling machines, Grinding machines and other advanced equipments to provide customers with cutting and other processing services. All the products should be inspected the metallographic analysis, hardness, ultrasonic flaw detection and other strict inspection processes, which meet the standards of DIN, AISI, JIS and GB to ensure their function and quality.
Our company keeps the principle of “sincerely cooperation, endless striving for perfection”. We desire to establish the long-term mutual beneficial and win-win relationship with clients all over the world.