Available Shapes
P20 Tool Steel
P20 Mold Steel is a versatile, low-alloy tool steel that is characterized by good toughness at moderate strength levels. The steel is commonly used for plastic injection mold cavities and tooling and for die casting dies for zinc. P20 is typically sold in pre-hardened condition at a hardness of approximately 300 HBW.
Related Specifications
AISI ASTM A681 DIN 17350 BS EN ISO 4957
Applications
Typical Analysis
Forging
Annealing
Stress Relieving
Hardening
Tampering
Applications
plastic mould steel is ideally suited for the production of plastic moulds. Typical applications include die holders, zinc die casting dies, backers, bolsters and injection moulds. The versatility of plastic mould steel with its high tensile characteristics enables uses for a variety of other applications such as shafts, rails and wear strips
Typical Analysis
| Carbon | 0.40% | Silicon | 0.40% |
| Manganese | 1.00% | Chromium | 1.20% |
| Molybdenum | 0.35% |
Forging
Heat slowly, allowing sufficient time for the steel to become heated through. Begin forging at 1050°C. Do not forge below 930°C reheating if necessary. After forging, cool very slowly.
Annealing
Annealing takes place at 760-788°C (1400 to 1450°F) and then the steels are cooled slowly in the furnace at a temperature less than 4°C (40°F) per hour.
Stress Relieving
When dies are heavily machined, we recommend stabilising just before finish machining in order to relieve machining strains. Heat to 460-500°C. Soak well and allow to cool in the air.
Hardening
Heat the steel uniformly to 820-840°C until heated through. Quench in oil.
Tampering
Heat uniformly and soak at the tempering temperature for at least one hour per 25mm of section. Allow to cool in still air.
| Temperature [°C] | 100 | 200 | 300 | 400 | 500 | 600 |
| Hardness [HRc] | 51 | 50 | 48 | 46 | 42 | 36 |
| Tensile [N/mm²] | 1730 | 1670 | 1570 | 1480 | 1330 | 1140 |
We never share your information