Alloy 230

• 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.