Custom 450®

UNS #S45000

Custom 450® is a martensitic age-hardenable stainless steel which exhibits very good corrosion resistance (similar to 304) with moderate strength (similar to 410). The alloy has a yield strength somewhat greater than 100 ksi (689 MPa) in the annealed condition but is easily fabricated. A single-step aging treatment develops higher strength with good ductility and toughness. This stainless can be machined, hot-worked, and cold-formed in the same manner as other martensitic age-hardenable stainless steels with mechanical properties that will depend on the aging temperature selected. A particular advantage is ease of welding and brazing.

Type Analysis

  • Carbon (Maximum) 0.05
  • Phosphorus (Maximum) 0.03
  • Silicon (Maximum) 1
  • Nickel (Nominal) 5.00-7.00
  • Manganese (Maximum) 1
  • Sulfur (Maximum) 0.03
  • Chromium (Nominal) 14.00-16.00
  • Molybdenum (Nominal) 0.50-1.00
  • Iron (Nominal) Balance
  • Copper (Nominal) 1.25-1.75
  • Columbium/Niobium 8 X C Minimum

Applications

oil field valve parts, chemical process equipment, aircraft fittings, fasteners, pump shafts, nuclear reactor components, gears, paper mill equipment, missile fittings, and jet engine parts.

Applicable Specifications

  • AMS 5763
  • AMS 5863 (Strip)
  • ASTM A693 (strip)
  • MR0175
  • AMS 5773
  • ASTM A564 (XM-25)
  • ASTM A959

Billet

Flats

Plate

Rounds

Square

Strip

Sheet

Weld Wire

Shapes

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