Incoloy 800H is a nickel-iron-chromium alloy known for its extreme power and extraordinary resistance to oxidation and carburization at prolonged temperatures. It’s a changed version of Incoloy 800, with a better carbon content for superior creep and strain rupture features, making it best for high-temperature applications. MV Super Alloys is the best supplier of Incoloy 800H Buttweld Fittings.