Guangzhou Changfeng Steel Co., LTD
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Production Introduction
P20+S tool steel is a plastic mold steel firstly produced by German brand Buderus, this steel with uniform hardness, good polishing performance, good machinability, pre-hardened, can be processed directly.
The machinability is increased compared to P20, and the wear resistance is increased over that of P20.
Annealed Hardness: 290 to 330 HBS
Pre-hardened Hardness: 28-32 HRC
Grade
| W.Nr | DIN | AFNOR | AISI/SAE |
| 1.2312 | 40CrMnMoS8-6 | (40CMD8S) | P20+S |
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 |
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 |
Application:
1. Large long-life plastic injection mold, such as household appliances, computer cases and other molds.
2. Thermoplastic extrusion die
3. Blow mold
4. Molding tools
5. Structural parts
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.
More about P20+S tool steel bar
* P20+S plastic mold steel is a German Gerritz imported conventional melting EF + LF + VD material.
* P20+S suitable for limited polishing, with excellent machinability, general chrome plating and sun protection, good toughness and machinability, not suitable for higher tanning and polishing.
* P20+S plastic mold steel is mainly used in plastic mold, mold, plastic mold and die-casting mold and so on.
P20+S/1.2312 round bar, flat bar, plate and block. As an alloy tool steel grade P20+S/1.2312 is commonly supplied in the hardened and tempered condition with a supply hardness of approximately 300HB.
This steel gives an excellent polished finish and is one of the most widely accepted specifications for machine cut plastic moulds and zinc die casting dies.
This grade gives excellent wear resistance but if maximum surface hardness is required for compression moulding plastic dies or similar tools, the steel can be case hardened or nitrided.
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.
About Guangzhou Changfeng Steel Co., Ltd
We are group of companies and owned manufacturer bases and trading company. We specialized in plastic mold steel,hot work mould steel,cold work mould steel,alloy steel for mechanical,high speed steel,etc.
All material are with high quality and competitive price.
We are here waiting for a cooperation chance between us, contact us and you will have one more loyal mold steel supplier!
Our service
We provide quality special steel for all industries.
Orders of any size, any length, ship fast
We carry a unique inventory of specialty special steel
Provide related value-adding services :
metal cutting, sizing, machining (blanking, milling, grinding), and heat treatment.
Sawing for small or large quantities, sawing-to-size.
Excellent customer service
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