Nickel-chromium-iron-molybdenum grade, Alloy X offers outstanding strength and corrosion resistance at temperature up to 1093°C

A solid solution strengthening grade, Alloy X has good strength and corrosion resistance in reducing carburising atmospheres.

  • UNS Number: N06002
  • Werkstoff Number: 2.4665
  • ASTM: B435, B572, 5754, 5798
  • AMS: 5536

Product availability

Round Bar
Welding Wire

Chemical analysis



  • Combustion liners
  • Turbine exhaust components
  • Aircraft cabin heaters
  • Transition Ducts
  • Industrial furnaces

About Alloy X

Alloy X has excellent resistance to reducing and carburizing atmospheres, making it suitable for furnace components. Due to its high molybdenum content, Alloy X may be subject to catastrophic oxidation at 1204°C.

The alloy has good high temperature strength coupled with oxidation resistance up to 1093°C.

This Alloy is readily weldable using matching filler wires. After severe forming, fabrications may be annealed at 1177°C, 15 minutes per 1/8″ of thickness, rapid air cool.

To learn more about Alloy X get in touch using our contact form, or fill in our online quote form and we’ll get back to you!

  • Density: 8.221g/cm³
  • Melting range: 1260-1354°C

Mechanical & Physical Properties

Mechanical &Physical Properties21C°538°C649°C760°C871°C982°C
Ultimate Tensile Strength /MPa765.3613.6572.2462310.3-
0.2% Yield Strength /MPa379.2248.2241.3234.4193-
Elongation %4449545358-
Coefficient of Thermal Expansion /mm/m°C x 10-6-15.115.515.816.216.6
Thermal Conductivity /kcal/(hr.m.°C)-16.81920.722.624.4
Modulus of Elasticity/ x105 MPa2.071.791.721.591.521.38

Typical Stress Rupture Strength Plate & Bar

Temperature °C649°C816°C982°C
100 Hours, ksi48144
10,000 Hours, ksi34102
Proud members of the British Valve & Actuator AssociationProud members of the British Valve & Actuator Association