what is the name of a copper alloy which mentioned follow?

The followings are common alloys of copper with zinc and tin:

1. Brass (黃銅) : An alloy of copper with zinc. It has a yellow colour. It is relatively resistant to tamishing, and is often used for decorative, plumbing and electrical applications. Hong Kong copper coins are made of this alloy.
2. Bronze (青銅) : An alloy of copper with tin. It is strong and tough and has myriad uses in industry.
3. Gunmetal : An alloy of copper, tin, and some zinc, originally used chiefly for making guns, but later superseded by steel. It is also called red brass in America.

2007-01-21 06:56:22 補充：
Spelling mistake: The word "tamishing" in Item 1 should spell as "tarnishing".

Bronze