Available Shapes
1.2311 / P20 Tool Steel
DIN 1.2311 / P20 Tool Steel / Plastic Mold Tool Steel is low alloyed steel with 2.0% Cr,0.15%Mo as per DIN standard. As plastic mold tool steel, it has good toughness, wear resistance after Nitriding. It is mostly used in hardened and tempered conditions with hardness 285-320 HBW. Typical applications for this steel are: For large injection and compression molds, Blow molds, die, holders, backers, and Structural components, shafts, etc
Applications
Analysis
Forging
Annealing
Stress Relieving
Hardening
Tampering
Applications
This tool steel grade 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 1.2311 tool steel with its high tensile characteristics enables uses for a variety of other applications such as shafts, rails and wear strips
Analysis
| Carbon | 0.35-0.45% | Chromium | 1.80-2.10% |
| Manganese | 1.30-1.60% | Molybdenum | 0.15-0.25% |
| Sulphur | 0.03% max | Silicon | 0.20-0.40% |
| Phosphorous | 0.03% max |
Forging
Heat the steel slowly, allowing sufficient time for it to become heated through. Begin forging at 1050°C. Do not forge below 930°C reheating if necessary. After forging, cool very slowly.
Annealing
Heat uniformly to 770-790°C. Soak well, cool slowly in the furnace.
Stress Relieving
When dies are heavily machined, we recommend stress relieving 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 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 |
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