Available Shapes
40CrMnMo7 Steel
40CrMnMo7 steel suppliers, delivering throughout the Middle East. Nifty Alloys LLC are stockholders and suppliers of round, flat, plate and block. 40CrMnMo7 is commonly supplied hardened and tempered. 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. This steel gives an excellent polished finish and is one of the most widely accepted specifications for machine cut plastic moulds.
Applications
Analysis
Forging
Annealing
Stress Relieving
Hardening
Tempering
Applications
A popular grade used in the production of plastic moulds. Applications include die holders, casting dies, backers, bolsters and injection moulds. With its high tensile characteristics it is also suitable for producing shafts, wear strips and rails.
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 slowly, allowing sufficient time for it to become heated through. Forge at 1050°C. Do not forge below 930°C reheating if necessary. Cool very slowly after forging.
Annealing
Heat uniformly to 770-790°C. Soak well, cool slowly in a furnace.
Stress Relieving
If components 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 air cool.
Hardening
Heat the component uniformly to 820-840°C until heated through. Quench in oil.
Tempering
Heat uniformly and soak at the tempering temperature for at least one hour per 25mm of section. Air cool.
| 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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