本规范涵盖砂或离心铸件形式的镍铝青铜合金。这些铸件通常用于需要结合高强度和硬度以及一定延展性和韧性的零件，但用途不限于此类应用。

This specification covers a nickel-aluminum bronze alloy in the form of sand or centrifugal castings.These castings have been used typically for parts requiring a combination of high strength and hardness with some ductility and toughness, but usage is not limited to such applications.