EN47 |
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EN47 is a tough oil quenching spring steel which, when heat treated, offers good wear resistance.
TYPICAL ANALYSIS |
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C. |
Mn. |
Cr. |
V. |
0.50% |
0.75% |
1.00% |
0.15% |
Forging:
Forge at 1050C. Do not work this steel when it has fallen below 840C.
Annealing:
Slow furnace cool from 840/860C.
Hardening: Pre heat slowly to 650/700C and thoroughly soak. Continue heating to the final hardening temperature of 850/870C and allow the component to be heated through. Quench in oil.
Tempering:
Temper immediately after quenching whilst tools are still hand warm. Re-heat to the tempering temperature, soak for one hour per 25 millimetre of total thickness, 2 hours minimum, then cool in air. For most applications tempering will be between 400/600C.
| Tempering °C |
100 |
200 |
300 |
400 |
450 |
500 |
550 |
600 |
HRc |
56 |
53 |
50 |
49 |
46 |
44 |
40 |
36 |
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