Overview
Martensitic stainless steel with good strength and corrosion resistance but excellent hardness and wear resistance. The 440C alloy has higher levels of carbon compared to 440A and 440B.
Typical Uses
Valve components, pump parts, and bearings.
MetalTek Grade
MTEK 440C
Similar Specifications
Cast UNS: J91639
Wrought UNS: S44004
Wrought Grade: 440C
Cast Grade: 440C
Military/AMS: AMS 5352
* AMS specifying investment casting.
Typical Chemical Composition (% by wt.)
Aluminum: n/a
Carbon: 0.95-1.20
Chromium: 16-18
Manganese: 1
Iron: BAL
Copper: n/a
Nickel: 0.75 MAX
Lead: n/a
Tin: n/a
Silicon: 1
Zinc: n/a
Other: Mo 0.25-0.75
Minimum Mechanical Properties
Heat Treatment: Anneal
NOTES: Brinell value is MAX.