A297 HX

Grade HX is a high-performance austenitic stainless steel casting alloy defined by ASTM A297/A297M, designed for severe high-temperature applications requiring maximum resistance to oxidation, carburization, and creep. It typically contains about 25% chromium and 20% nickel, with additions of molybdenum to enhance strength and corrosion resistance under prolonged thermal exposure. HX is widely used in furnace hardware, reformer tubes, and thermal processing components that operate under cyclic heating and in corrosive atmospheres. Its excellent mechanical stability and oxidation resistance make it a preferred material in petrochemical, metallurgical, and heat-treatment industries where both durability and reliability are paramount.