CRUCIBLE WF11 is a ductile cobalt-base alloy having exceptional mechanical properties at temperatures up to 1800 F in the fully annealed condition without subsequent aging. It is recommended for high temperature service. This datasheet provides information on composition, physical properties, hardness, and tensile properties as well as creep. It also includes information on high temperature performance and corrosion resistance as well as heat treating, machining, and joining. Filing Code: Co-33. Producer or source: Crucible Steel Company of America.