With excellent resistance to sulfuric acid corrosion, NAS 255 (UNS N08904) is a stainless steel custom-made for resisting reducing acids. The alloy is available in flat products. This datasheet provides information on composition, physical properties, hardness, elasticity, and tensile properties. It also includes information on corrosion resistance as well as forming, heat treating, and joining. Filing Code: SS-1061. Producer or source: Nippon Yakin Kogyo Company Ltd.