HAYNES alloy No. 263 is a vacuum-melted and electroflux-refined high-temperature nickel-base alloy. It has good formability and weldability. It was developed by Rolls Royce. This datasheet provides information on composition, physical properties, elasticity, and tensile properties as well as creep, and deformation. It also includes information on corrosion resistance as well as forming, heat treating, and joining. Filing Code: Ni-352. Producer or source: Haynes International Inc..