HPM 455 is a precipitation hardenable martensitic stainless steel. The composition provides a good combination of corrosion resistance and heat-treated strength favorable for fatigue applications. The material is well suited for demanding spring devices. 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-666. Producer or source: Hamilton Precision Metals Inc.