Cobalt Alloy 12

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Cobalt Alloy 12

Cobalt Alloy 12 supplied by Shanxi Youte Steel (jlhsteel.net).

Chemical Composition (%)

CR28
W7
C1.4
SI2
MN2

Chinese Standard

AWS A5.13

Equivalent Grades

Stellite 12

Applications

Specialty, corrosion-resistant and electronic applications.

Available Forms

Bar, Plate, Sheet, Tube, Wire, Casting, 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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