Metal having a specified copper content of less than 99.3% but more than 40% and having no other element in excess of the copper content (except in the case of certain copper-nickel-zinc alloys, in which zinc slightly exceeds the copper content).
Metal having a specified copper content of less than 99.3% but more than 40% and having no other element in excess of the copper content (except in the case of certain copper-nickel-zinc alloys, in which zinc slightly exceeds the copper content).