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.
Valve components, pump parts, and bearings.
Wrought UNS: S44002
Wrought Grade: 440A
Typical Chemical Composition (% by wt.)
Other: Mo 0.75
Minimum Mechanical Properties
Heat Treatment: Anneal
NOTES: Brinell value is MAX.
Explore Other Alloys
Non-ferrous alloys are, literally, materials that are not iron-based. While others may provide non-ferrous materials of other materials, the MetalTek family of non-ferrous alloys are copper-based. In general, these materials deliver high strength, and excellent wear and corrosion resistance. They are often found in marine applications and also bushing, bearing, and gear environments.
Stainless steels owe their ability to resist corrosion primarily to the presence of a passive film on their surface. Chromium is chiefly responsible for formation of the passive film. Iron ceases to rust at approximately 12% chromium content and resistance to oxidizing corrosives increases rapidly with chromium content up to approximately 20%.
Specialty Alloys comprise a broad group of materials that deliver properties for more demanding applications, use more exotic or expensive materials, or require special processes to manufacture. Where standard materials may not offer desired performance, specialty alloys (including those that are modified further) may be a sensible selection.