1.1 This specification covers stainless steel forgings for compressor and turbine bucket, blade, and airfoil applications. 1.2 This specification is expressed in both inch-pound units and in SI units; however, unless the This specification covers stainless steel forgings for compressor and turbine bucket, blade, and airfoil applications. The stainless steel shall be made by the melting process and either the closed impression die or the open die forging processes may b