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