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40CrMnMoS8-6 Steel
40CrMnMoS8-6 steel suppliers delivering throughout the Middle East. Nifty Alloys LLC are stockholders and suppliers of round, flat bar, plate and block. 40CrMnMoS8-6 is high tensile steel popular for plastic mould applications.
Applications
Analysis
Forging
Stress Relieving
Annealing
Hardening
Tempering
Applications
This grade is commonly used for the production of moulds where improved machinability is required. Typical applications include die holders, zinc die casting dies, backers, bolsters and injection moulds. The versatility of this plastic mould tool steel with its high tensile strength enables uses for a variety of other applications such as shafts and wear strips.
Analysis
| Carbon | 0.35-0.45% | Chromium | 1.80-2.00% |
| Manganese | 1.40-1.60% | Molybdenum | 0.15-0.25% |
| Sulphur | 0.05-0.10% | Silicon | 0.30-0.50% |
| Phosphorous | 0.03% max |
Forging
Heat slowly, allowing sufficient amount of time for the steel to become heated through. Forge at 1050°C, do not forge below 930°C reheating if necessary. Cool very slowly after forging.
Stress Relieving
When the steel is heavily machined, stabilising just before finish machining is recommended to relieve machining strains. Heat to 460-500°C. Soak well and allow to air cool.
Annealing
Heat uniformly to 710 to 740°C. Soak well, slowly cool in the furnace.
Hardening
Heat uniformly to 710 to 740°C. Soak well, slowly cool in the furnace.
Tempering
Heat uniformly and soak at the tempering temperature for at least one hour per 25mm of ruling 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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