1.1 This specification covers vacuum-melted zirconium and zirconium alloy ingots for nuclear application. 1.2 The values stated in either inch-pound units or SI units are to be regarded separately as standard. Within the This specification covers vacuum-melted zirconium and zirconium alloy ingots for nuclear application. Materials covered shall be produced by multiple vacuum arc melting, or electron beam melting, or other melting processes conventionally used for react