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Alloy 230

A Nickel-Chromium-Tungsten-Molybdenum grade, Alloy 230 has outstanding oxidation resistance up to 1149 °C.

Alloy 230 has excellent long-term resistance to oxidation and thermal stability. In addition, the alloy also has good resistance to nitriding and carburising environments.


Product formSize range fromSize range to
Alloy 230 round bar12.7 mm152.4 mm GET A QUOTE
Alloy 230 sheet & plate0.4 mm38.1 mm GET A QUOTE

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Round Bar

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Sheet & Plate

Chemical Analysis



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Perfect for applications in the Power Generation industry

Alloy 230 can be used in a variety of applications, here are just a few examples:

  • Transition ducts on turbine engines
  • Combustion linings on turbine engines
  • Furnace retorts
  • Burner flame shrouds
  • Vacuum heat treat fixtures
  • Chains and fixtures
  • Nitriding furnace internals
  • Sparger tubes and recuperative internals

About Alloy 230

Alloy 230 has outstanding oxidation resistance and superior strength up to 1149 °C. Comparable to Alloy 600, Alloy 230 exhibits excellent nitriding and carburising resistance. The alloy is one of the most nitriding-resistant materials available.

Alloy 230 has excellent creep and fatigue resistance combined with long-term stability. In addition the alloy is resistance to grain coarsening when subject to elevated temperatures for prolonged periods.

Alloy 230 is easily fabricated and welded. As a result of its good ductility, Alloy 230 is readily formed by cold working.


8.968 g/cm³
Melting range:


UNS Number:
ASTM B435, B564, B572, B619, B622, B626, B366, AMS 5878, 5981
Download the Alloy 230 Data Sheet Download

FAQs & Resources

  • Excellent oxidation resistance to 1149°C.
  • Superior high temperature strength, creep and stress rupture properties.
  • Resistance to grain coarsening at high temperatures.
  • Excellent thermal stability at 649°C - 817°C due to its resistance to sigma phase, mu phase and other deleterious phase formations after long term exposure.
  • Excellent resistance to nitriding environments.
  • Good resistance to carburising environments.

Alloy 230 is a Nickel-Chromium-Tungsten-Molybdenum alloy.

  • Transition ducts and combustors in turbine engines
  • Furnace retorts
  • Vacuum furnace fixtures and baskets
  • Expansion bellows
  • Nitric acid catalyst baskets

The ability of metallic materials to resist chemical degradation of the surface caused by the action of air or other gaseous mediums at high temperatures. Most metals are oxidised by the Oxygen in the air. This process is called corrosion. Electrons leap from the metal to the Oxygen molecules causing its oxidation state to increase. The negative Oxygen ions which are thus formed penetrate into the metal, contributing to the growth of an oxide surface, also more commonly known as rust. Therefore, oxidation resistance is essentially the ability to resist degradation due to rusting. Resistance to oxidation and/or high temperature oxidation is mainly dependant on the Chromium content present in an alloy. With a nominal Chromium content of 22%, alloy 230 for instance demonstrates excellent oxidation resistance to 1149°C.

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