NITREX-I is a special alloy steel that can be surface hardened by the nitriding process. Vacuum consumable remelting renders the alloy exceptionally uniform and free from impurities. This datasheet provides information on composition, physical properties, hardness, elasticity, and tensile properties as well as fracture toughness. It also includes information on corrosion resistance as well as forming, heat treating, machining, and joining. Filing Code: SA-187. Producer or source: Carpenter.