Power plants can certainly have their share of high-temperature corrosion problems when burning low-grade fuels, but even facilities which are clean-fuel-fi red, or which employ fluidized bed combustion technology, can still experience severe materials problems. Frequent replacement or maintenance for components such as burner buckets, dampers, cyclone separators, U-beams, L-valves, and hot gas ducting, among others, can mean costly unscheduled downtime.
HAYNES® 230® alloy is one of the few materials to combine the levels of design strength and combustion environment resistance necessary to ensure the long-lived, low-maintenance performance that will keep the plant running. It is exceptionally well suited for components that normally fail by distorting or cracking, or which suffer severe oxidation. Although not suited for severe sulfur- or chlorine-bearing gas streams, where HAYNES® 556® or HR-160® alloys would be more suitable, 230® alloy does provide excellent service in clean to moderately-dirty environments up to 2100°F (1150°C).
230® alloy is covered by ASME Vessel and Piping Code Case No. 2063-2 for use up to 1650°F (900°C). It is currently in service in several boiler and fluidized bed facilities, and on test in many others.
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