High-temperature expansion bellows are key components in many different industrial operations. In the chemical and power industries; in metallurgical and mineral process facilities; and in waste incineration plants, selection of the materials of construction for expansion bellows can be of critical importance to long-term, cost effective performance.
HAYNES® 230® alloy combines the best in high-temperature strength, thermal stability, environment-resistance and fabricability of any commercial nickel-base alloy. With nearly the same design strength of HAYNES® 625 alloy and none of alloy 625’s embrittlement problems, 230 alloy is a top choice for high-temperature bellows applications. Its lower thermal expansion characteristics can be a big plus as well.
HAYNES 230 alloy is a top-of-the-line high-performance, industrial heat resistant alloy for applications demanding high strength as well as resistance to environment. It is a substantial upgrade in performance capabilities from common iron-nickel-chromium and nickel-chromium alloys, and displays the best combination of strength, stability, environment resistance, and fabricability of any commercial nickel-base alloy.
230 alloy can be utilized at temperatures as high as 2100°F (1150°C) for continuous service. Its resistance to oxidation, combustion environments and nitriding recommends it highly for applications such as nitric acid catalyst grids, high-temperature bellows, industrial furnace fixtures and hardware, strand annealing tubes, thermocouple protection tubes, and many more.
230 alloy is covered by ASME Section VIII, Division I, and ASME Section I, Code Case 2063, both up to 1650°F (900°C). 230 alloy is also covered by a number of ASTM and AMS specifications.
Oxidation in Air - Excellent at 2100°F (1095°C) Nitriding - Best Commercial alloy
Sulfidation - Equal to X alloy Chlorination - Equal to 625 alloy
Carburization - Equal to X alloy Hydrogen Embrittlement - Excellent