440C Stainless Steel Bar

UNS S44004

Stainless steel 440C, also known as UNS S44004, principal elements are .95% to 1.2% carbon, 16% to 18% chromium, .75% nickel, with traces of manganese, silicon, copper, molybdenum, phosphorus and sulfur. Grade 440C is a high carbon martensitic stainless with moderate corrosion resistance good strength, and the ability to obtain and hold excellent hardness (Rc 60) and wear resistance. It is considered to be slightly cold workable by common practices and does respond to heat treatment.

Industries that use 440C include:

  • Machine shop
  • Tool
  • Utensils

Products partially or completely constructed of 440C include:

  • Ball bearings
  • Knives
  • Mold inserts
  • Nozzles
  • Surgical tools
  • Valves
  • Wear parts of pumps
Stocking Diameters ½” to 16”
Material Lengths Up to 12’
Bar Specifications
Uns Type Ams Astm Federal Characteristics
S44004 440C 5618
5630
5880
A-276
A-314
A-493
QQ-S-763 440 A, B, and C all have the same basic composition with varying high carbon contents. This produces higher strength/hardness with 440 versions. Corrosion resistant only in the hardened condition.
Chemistry Analysis
C MN P S SI CR NI MO CU OTHER M/NM
.95 – 1.2 1. .04 .03 1. 16. – 18. .75 .75 .5   M

The information above is not warranted, guaranteed, or for design purposes.

The information above is not warranted, guaranteed, or for design purposes.

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