TOPHET Alloy A has long been used in resistance heating elements serviceable to 2150 F(1175 C). Resistance to chemical corrosion and to carburizing atmospheres broaden the alloy's range of applications. This Digest supercedes Filing Code Ni-39 of 2/58. This datasheet provides information on composition, physical properties, and tensile properties. It also includes information on corrosion resistance as well as forming, heat treating, machining, and joining. Filing Code: Ni-389. Producer or source: Carpenter Technology Corporation.