Precipitation-hardenable nickel-cobalt-chromium grade, Alloy 105 is ideal for high temperature service.

With the addition of molybdenum for solid-solution strengthening, Alloy 105 offers superior strength and heat resistance. The alloy has high creep-rupture properties at temperature up to 950°C.

  • Werkstoff Number: 2.4634
  • ASTM: B637, MSRR 7004, 7022, 7063, 7070, 7162, 7193, 7952,
  • Other: BS: HR 203, 3HR1, HR2, HR3, HR4, BS4HR 601

Product availability

Round Bar

Chemical analysis



  • Turbine blades
  • Turbine discs
  • Turbine shafts
  • Forgings
  • Rolled rings
  • Bolts and fasteners

About Alloy 105

Alloy 105 has excellent heat resistant properties, high strength and excellent oxidation resistance. The high creep-rupture properties of Alloy 105 makes the alloy perfect for critical gas turbine applications.

Alloy 105 can be heat treated as followed;

For optimum long term creep and ductility at 850-950°C:
4 hours at 1150°C, 16 hours at 1050-1065 °C and 16 hours at 850°C with air cooling after all heat treatment operations.

Where tensile strength, elongation and impact stength are more critical at temperature up to 700°C:
4 hours at 1125°C and 16 hours at 850°C with air cooling after all heat treatment operations.

  • Density: 8 g/cm³
  • Melting range: Liquidus 1345°C & Solidus 1290°C
  • Specific Heat Capacity: 419 J/kg.°C
  • Electrical Resistivity: 1.31 µΩ.m

Mechanical & Physical Properties

Mechanical & Physical Properties21.1°C93.3°C148.9°C204.4°C315.6°C371.1°C426.7°C537.8°C648.9°C750°C815°C870°C982°C1093°C1204°C
Ultimate Tensile Strength /MPa114011231123108410911101110110641038---175--
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