Alloy Grade – UNS: 440A – Martensitic stainless Steel

  • Overview

    440A is a martensitic stainless steel with good strength and hardness but excellent corrosion resistance and wear resistance. The boosted corrosion and hardness comes from hardening and tempering.

  • Typical Uses

    Valve components, pump parts, and bearings.

  • MetalTek Grade

    MTEK 440A

Similar Specifications

Wrought UNS: S44002

Wrought Grade: 440A

Typical Chemical Composition (% by wt.)

Aluminum: n/a

Carbon: 0.60-0.75

Chromium: 16-18

Manganese: 1

Iron: BAL

Copper: n/a

Nickel: n/a

Lead: n/a

Tin: n/a

Silicon: 1

Zinc: n/a

Other: Mo 0.75

Minimum Mechanical Properties

Brinell Typical:


Heat Treatment: Anneal

NOTES: Brinell value is MAX.