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金属分为黑色金属和有色金属,黑色金属包括铁、锰、铬及它们的合金,如钢、生铁、铁合金、铸铁等;除铁、锰、铬以外的八十三种金属都叫做有色金属,如铜、锡、铅、锌、铝以及黄铜、青铜、铝合金和轴承合金等。另外在工业上还采用铬、镍、锰、钼、钴、钒、钨、钛等,这些金属主要用作合金附加物,以改善金属的性能,其中钨、钛、钼等多用以生产刀具用的硬质合金。以上这些有色金属都称为工业用金属,此外还有贵重金属:铂、金、银等和稀有金属,包括放射性的铀、镭等。
Metal is divided into ferrous and nonferrous metals, ferrous metals include iron, manganese, chromium and their alloys, such as steel, pig iron, ferroalloy, cast iron, etc .; 83 other than iron, manganese, chromium are called non-ferrous metals, Such as copper, tin, lead, zinc, aluminum and brass, bronze, aluminum and bearing alloys. In addition, the industry also uses chromium, nickel, manganese, molybdenum, cobalt, vanadium, tungsten, titanium, etc., these metals are mainly used as alloy additions to improve the performance of metals, including tungsten, titanium, molybdenum and other multi-purpose tool used to produce Carbide. These non-ferrous metals are known as industrial metals, in addition to precious metals: platinum, gold, silver and other rare metals, including radioactive uranium, radium and so on.