Available Shapes
1.2842 Tool Steel
1.2842 / 90MnCrV8 tool steel suppliers and stockholders delivering to the whole of the Middle East. Nifty Alloys LLC are stockholders and suppliers round bar. 1.2842 is an oil hardening tool steel type supplied in the annealed condition. Suitable for through hardening it offers characteristics of good durability, excellent wear resistance and holds a good cutting edge. It is a good quality general purpose tool steel often used where the expense of a high carbon high chromium grade is not justified.
Analysis
Forging
Annealing
Hardening
Martempering
Tampering
Heat Treatment
Analysis
| Carbon | 0.85-0.95% | Chromium | 0.20-0.50% |
| Manganese | 1.80-2.20% | Silicon | 0.10-0.40% |
| Sulphur | 0.03% max | Vanadium | 0.05-0.20% |
| Phosphorous | 0.03% max |
Forging
Heat the tool steel slowly and uniformly to 1000°C. Forge within a range of 1050-850°C reheating if necessary. Cool slowly (preferably in a furnace) to avoid setting up stresses.
Annealing
Heat uniformly to 720°C, equalise, then furnace cool. (Hardness about 229 Brinell). Fully machined tools in grade 1.2842 should be packed during annealing.
Hardening
Heat the 1.2842 uniformly to 790-820°C until heated through. (If possible pre-heat at 300-500°C). Allow 30 minutes per 25 millimetre of ruling section and quench immediately in oil.
Martempering
Martempering of 1.2842 is an alternative hardening procedure which may be used when suitable salt bath equipment is available.
Tampering
Heat the steel uniformly and thoroughly at the selected tempering temperatures and hold for at least one hour per 25mm of total thickness.
| Temperature [°C] | 100 | 150 | 200 | 250 | 300 | 400 |
| Hardness [HRc] | 64 | 63 | 62 | 60 | 56 | 50 |
Heat Treatment
Heat treatment temperatures, including rate of heating, cooling and soaking times will vary due to factors such as the size and shape of each component. Other considerations during the heat treatment process include the type of furnace, quenching medium and work piece transfer facilities. Please consult your heat treatment provider for full guidance on heat treatment of tool steels.
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