BG42

Stainless Steel

BG42

Specialty steel grade. earing steel. (AMS; equiv BG42 / AMS 5616). Nominal values—confirm mill certificate.

Chemical Composition (%)

C0.95
CR16
MO0.75

Mechanical Properties

Tensile:≥760 MPa;Hardness:≥58 HRC

Equivalent Standards

AMS 5616

Applications

高碳高硬马氏体，轴承刀具。,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

AMS BG42 / BG42

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