SUH3A

Stainless Steel

SUH3A

Specialty steel grade. ; equiv ASTM 440A / JIS SUS440A). Nominal values—confirm mill certificate.

Chemical Composition (%)

C0.6
CR16

Mechanical Properties

Tensile:≥760 MPa;Hardness:≥55 HRC

Chinese Standard

JIS G4901 SUH3A

Equivalent Standards

ASTM 440A

Applications

高碳马氏体，刀具轴承。,Bar

Available Forms

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.

Uses

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

Heat Treatment

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.

Precautions

JIS SUS440A

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