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AISI 440C - EN 1.4125
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Essential details
AISI 440A and 440B are identical except for slightly lower carbon contents (0.60 - 0.75% and 0.75 - 0.95% respectively); these have lower attainable hardnesses but slightly higher corrosion resistances. Although all three versions of this grade are standard grades, in practice 440C is more available than the A or B variants.
A free-machining variant 440F (UNS S44020) also exists, with the same high carbon content as 440C.
Typical Applications:
- Chisels
- Surgical equipment
- High quality knife blades
- Valve seats
- Rolling element bearings
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