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Standard Precision Tooling
Plastic Mould Steel P20/DIN 1.2311 / AISI P20 / 3Cr2Mo
P20 is a versatile, pre-hardened plastic mould steel designed to offer reliable machinability and high-quality mirror polishability. Engineered for balanced performance, it provides uniform hardness across sections and excellent toughness to resist cracking under operational stress. As a standard grade for injection moulds, mould frames, and die holders, P20 supports stable EDM performance and consistent dimensional stability during the manufacturing process.
Key Features
- Pre-hardened for faster mold production
- Uniform hardness distribution
- Excellent mirror polishability
- Reliable machinability & toughness
- Fantastic weldability for repairs
Main Applications
- Injection moulds & mould frames
- Die holders & shoe blocks
- Pressure casting & zinc dies
- Bolster plates & backers
- Recipient sleeves & casting dies
International Standards Comparison
| ASTM A681 | DIN | ISO | GB | JIS |
|---|---|---|---|---|
| P20 | 1.2311 | 40CrMnMo7 | 3Cr2Mo | PDS-3 |
Chemical Composition (Typical Analysis in %)
| C | Si | Mn | Cr | Mo | P/S |
|---|---|---|---|---|---|
| 0.35-0.45 | 0.20-0.40 | 1.30-1.60 | 1.80-2.10 | 0.15-0.35 | ≤ 0.030 |
Material Properties
- Supply Hardness: 240-280 BHN (Uniformly distributed)
- Size Availability: Large cross-sections up to 500mm
- Surface Quality: High mirror finish with minimal streaks
- Manufacturing Efficiency: Significantly reduces lead time