本规范涵盖一种铜合金（黄铜），其形式为棒材和棒材。这些产品通常用于需要自由切削特性的自动高速螺杆机零件，但使用不限于此类应用。

This specification covers one type of copper alloy (brass) in the form of bars and rods.These products have been used typically for automatic high-speed screw machine parts where free-cutting characteristics are desirable, but usage is not limited to such applications.