PH stainless steel XM-25 丨Custom 450

Stainless Steel XM-25, also known as Custom 450, is a martensitic age-hardenable stainless steel. It offers corrosion resistance comparable to Type 304 but boasts a threefold increase in yield strength. While its yield strength exceeds 100 ksi in the annealed state, the alloy remains easily fabricable. Through a single-step aging treatment, it achieves enhanced strength while maintaining excellent ductility and toughness.

PH stainless steel XM-25 / Custom 450 / UNS S45000

Applications:

  • Pulp and paper industry
  • Medical devices
  • Aircraft parts
  • Power generation applications
  • Chemical processing
  • Nuclear applications

Normal product forms:

  • Sheets, bars, coils, and wires.
  • Round, square, hex (A/F), rectangle, billet, ingot, forged, etc.
  • Forged hollow bar, forged ring, forging blocks, forging shaft, forging discs & circles.

Specifications/Standard: AMS 5763, AMS 5773, AMS 5859, AMS 5863, ASTM A564 (XM-25), ASTM A693 (XM-25), ASTM A705 (XM-25)

Chemical Composition:
  • Chromium (Cr): 14.00-16.00%
  • Nickel (Ni): 5.00-7.00%
  • Molybdenum (Mo): 0.50-1.00%
  • Copper (Cu): 1.25-1.75%
  • Iron (Fe): Balance
  • Carbon (C): 0.05% max
  • Manganese (Mn): 1.00% max
  • Silicon (Si): 1.00% max
  • Phosphorus (P): 0.030% max
  • Sulfur (S): 0.030% max

Physical Constants and Thermal Properties

  • Density: 0.280 lbs/in³, 7.75 g/cm³
  • Modulus of Elasticity: 28 x 10^6 psi
  • Coefficient of Thermal Expansion: 5.88 x 10^-6 /°F at 68-212°F
  • Thermal Conductivity: 9.2 Btu/ft hr °F
  • Specific Heat: 0.11 Btu/lb °F
  • Electrical Resistivity: 42.4 Microhm-in

Mechanical Property:

  • Yield Strength, min. (ksi): 95
  • Tensile Strength, min. (ksi): 125
  • Elongation, min. (%): 10
  • Hardness, max (Rc): 32