A-21®

UNS #S41429

A-21® stainless carburizing steel for wear-resistant applications that require excellent corrosion resistance, high strength, and good toughness, as well as applications that require excellent edge retention, high hardness, and stainless properties. An advanced martensitic stainless steel, it can be used in the carburized, nitrided, and normalized & tempered conditions. Unlike any other alloy, A-21® develops a deep, hard, stainless case and a strong, tough, ductile core after a streamlined carburizing process. It is also weldable and hardenable to very large section sizes (> 20) and supplied as annealed, 302 HB, max.

Type Analysis

Applications

Gears, Bearings, Splines, Shafts, Actuators, Ball Screws/Nuts, Bolts/Carriers, Valves, Pumps, Nozzles, Cutlery

Applicable Specifications

Billet

Coil

Flats

Hollow Bar

Plate

Rectangles

Rod

Rounds

Sheet

Square

Wire

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