440B is a highly corrosion resistant steel with decent toughness. Although it is an older alloy it still takes a good edge, polishes well ad can achieve decent hardness at approx. 58/59HRc.
Chemical Composition:-
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C:
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Cr:
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Mn:
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V:
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Mo:
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Si:
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0.93%
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18%
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0.5%
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0.10%
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1.1%
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0.5%
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Suggested Heat Treatments:
Heat to 1040C Hold for 15 minutes
Oil Quench (Suggested Oil is Rye 32)
Temper twice for two hours at 150C for 59HRc or
Temper twice for two hours at 200C for 58HRc
Supplied Hot Rolled Pickled Annealed in 800mm Lengths