Sandvik APM 9980 is a low-carbon martensitic stainless steel with high mechanical properties. APM 9980 is a martensitic stainless steel specially designed for those applications requiring high mechanical properties combined with improved corrosion resistance relative to traditional martensitic steels. Note: This material is made by hot isostatic pressing of components. This datasheet provides information on composition, physical properties, microstructure, hardness, and tensile properties. It also includes information on high temperature performance and corrosion resistance as well as forming, heat treating, machining, and joining. Filing Code: SS-1298. Producer or source: Sandvik Materials Technology and Sandvik AB Sweden.