Cr14Mo4

Other

Cr14Mo4

Corrosion-resistant bearing steel for aggressive environments.

Chemical Composition (%)

C0.95
SI0.6
MN0.6
CR13
MO3.5
V0.1
P0.03
S0.03

Mechanical Properties

Hardness(annealed):≤255 HB;Hardness(hardened):58-62 HRC

Equivalent Standards

M50 Stainless

Equivalent Grades

GB Cr14Mo4 / 440C Modified

Applications

Corrosive environment bearings, food process, chemical pumps

Available Forms

Bar,Forging

Uses

Martensitic stainless steel combining moderate corrosion resistance with high strength and hardness after heat treatment. Used for cutlery, surgical instruments, turbine blades, valves, pumps, fasteners and bearings in mildly corrosive environments.

Heat Treatment

Annealing/quench from 980–1050 °C (oil or air) then temper 150–650 °C; lower temper gives higher hardness, higher temper improves toughness.

Precautions

Preheat and post-weld heat treat to avoid hydrogen cracking; soft anneal before heavy machining. Lower corrosion resistance than austenitic grades — not for strong chlorides.

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