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TYPICAL ANALYSIS
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C.
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Si.
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Mn.
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Cr.
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V.
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0.50%
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0.80%
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1.50%
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2.50%
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0.20%
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Forging:
Heat slowly and uniformly to 1000°C. Forge within a range of 1000/800°C, reheating if necessary. Cool slowly (preferably in a furnace) to avoid setting up stresses.
Annealing:
Heat uniformly to 770°C, equalise, then furnace cool.
Stress Relieving:
If machining operations have been heavy or if the tool has an unbalanced section, remove stresses before hardening by heating up to 700°C, equalise, then cool slowly.
Hardening:
Pre heat the S1 tool steel to 650°C and thoroughly soak. Continue heating to the final hardening temperature of 900/950°C. Allow sufficient time for the component to be heated through. Quench in oil.
Martempering:
Martempering is an alternative hardening procedure which may be used when suitable salt bath equipment is available.
Tempering:
Heat uniformly and thoroughly at the selected tempering temperature and hold for at least one hour per inch of total thickness.
| Tempering °C |
150
|
200
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250
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350
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400
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|
HRc
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62/61
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61/60
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60/59
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58/57
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55/54
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