铜是人类最早发现和使用的金属之一,紫红色,比重8．89,溶点1083．4℃。铜及其合金由于导电率和热导率好,抗腐蚀能力强,易加工,抗拉强度和疲劳强度好而被广泛应用,在金属材料消费中仅次于钢铁和铝,成为国计民生和国防工程乃至高新技术领域中不可缺少的基础材料和战略物资。在电气工业、机械工业、化学工业、国防工业等部门具有广泛的用途。 Copper is one of the earliest discovered and used by human beings, purple, the proportion of 8.89, melting point 1083.4 ℃. Copper and its alloys are widely used in the consumption of metal materials after steel and aluminum because of their good electrical conductivity and thermal conductivity, corrosion resistance, easy processing, good tensile strength and fatigue strength, becoming the people’s livelihood and national defense project As well as high-tech fields indispensable basic materials and strategic materials. In the electrical industry, machinery industry, chemical industry, defense industry and other departments have a wide range of uses.