EN30B
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EN30B is a 4¼% nickel air/oil hardening steel. It achieves a good through hardness with high strength and toughness. It is capable of taking a good polish and is widely used as a plastic mould steel.
TYPICAL ANALYSIS |
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C. |
Si. |
Mn |
Ni. |
Cr. |
Mo. |
0.35% |
0.25% |
0.50% |
4.25% |
1.20% |
0.30% |
Forging:
Heat slowly and uniformly to uniformly to 1050C. After forging cool slowly.
Annealing:
Heat uniformly to 630/650C. Soak well and cool slowly in the furnace.
Hardening:
Pre heat slowly yo 650/700C and thoroughly soak. Continue heating to the final hardening temperature of 830/850C and allow the component to be heated through. Quench in oil or cool in air.
Tempering:
Heat uniformly and thoroughly at the selected tempering temperatures and hold for one hour per inch of total thickness.
Tempering °C |
150 |
250 |
350 |
450 |
HRc |
49 |
47 |
44 |
38 |
Available sections:
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