UGI 4418 AIR is a martensitic stainless steel with strong corrosion resistance and mechanical performance. It is used for parts requiring a combination of high strength and high toughness. This datasheet provides information on composition, physical properties, hardness, elasticity, and tensile properties. It also includes information on corrosion resistance as well as forming and heat treating. Filing Code: SS-1296. Producer or source: Schmolz + Bickenbach USA Inc..