440B

UNS #S44003

440B is a high-carbon chromium stainless steel that attains a hardness of Rockwell C 58 when heat treated. This high-carbon chromium steel is designed to provide stainless properties with excellent hardness. In some respects it behaves similarly to tool steels.

Type Analysis

  • Carbon (Maximum) 0.75-0.95
  • Phosphorus (Maximum) 0.04
  • Silicon (Maximum) 1
  • Manganese (Maximum) 1
  • Sulfur (Maximum) 0.03
  • Chromium (Nominal) 16.00-18.00
  • Molybdenum (Nominal) 0.75
  • Iron (Nominal) Balance

Applications

cutlery, hardened balls and similar parts, permanent magnets.

Applicable Specifications

  • ASTM A276
  • ASTM A473
  • ASTM F899
  • ASTM A314
  • ASTM A580
  • QQ-S-763

Bar

Billet

Rod

Rounds

Strip

Wire

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