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Non-ferrous metals are iron, chromium, manganese, all three metals other than metal. China in 1958 will be iron, chromium, manganese included in the ferrous metals; and iron nonferrous metals distribution of chromium, manganese other than 64 kinds of metals included in the non-ferrous metals. Metals, such as aluminum, magnesium, potassium, sodium, calcium, strontium, barium, copper, lead, zinc, tin, cobalt, nickel, antimony, mercury, cadmium, bismuth, gold, silver, platinum, ruthenium Zinc, tungsten, tungsten, molybdenum, gallium, indium, thallium, germanium, rhenium, lanthanum, cerium, praseodymium, neodymium, samarium , Europium, gadolinium, terbium, dysprosium, holmium, erbium, thulium, ytterbium, lutetium, scandium, yttrium, thorium The strength and hardness of non-ferrous alloys are generally higher than pure metal, the resistance is larger than pure metal, the resistance temperature coefficient is small, Nonferrous metals has good comprehensive mechanical performance. Commonly used non-ferrous alloys are aluminum alloy, copper alloy, magnesium alloy, nickel alloy, tin alloy, tantalum alloy, titanium alloy, zinc alloy, molybdenum alloy, zirconium alloy. Because rare metals are of great importance in modern industry, they are sometimes divided from non-ferrous metals and become separate classes. And with black metal, non-ferrous metal side by side, become the three categories of metal. Non-ferrous metals are the basis of the development of national economy, aviation, aerospace, automobile, machinery manufacturing, electricity, communications, construction, home appliances and other industries are mostly non-ferrous metal materials for the production base. Nonferrous metals With the rapid development of modern chemical industry, agriculture and science and technology, the status of nonferrous metals in human development is becoming more and more important. It is not only the world's important strategic materials, important means of production, but also human life is an indispensable consumer information important material. Copper in nonferrous metals is one of the earliest metal materials used in humans. Modern nonferrous metals and their alloys have become an indispensable structural material and functional materials in the fields of machinery manufacturing, construction, electronics, aerospace, and nuclear energy utilization. Practical applications, usually non-ferrous metals are divided into five categories: Light metal Density of less than 4500 kg / cubic meter (0.53 ~ 4.5g / cm3), such as aluminum, magnesium, potassium, sodium, calcium, strontium, barium and so on. Heavy metals Density greater than 4500 kg / m3 (4.5g / cm3), such as copper, nickel, cobalt, lead, zinc, tin, antimony, bismuth, cadmium, mercury and so on. Precious metals The price is more expensive than ordinary metal, low crust abundance, purification difficulties, chemical stability, such as gold, silver and platinum group metals. Semi-metal The price is between metal and nonmetal, such as silicon, selenium, tellurium, arsenic, boron and so on. Rare metal Including rare light metals such as lithium, rubidium, cesium, etc .; Rare refractory metals such as titanium, zirconium, molybdenum, tungsten and so on; Rare metal, such as gallium, indium, germanium and so on; Rare earth metals such as scandium, yttrium, lanthanide metals; Radioactive metals, such as radium, francium, Nonferrous metals polonium and A element of uranium, thorium and so on. Previous: The Use Of Wire Rope Clamps
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