There are only 80 kinds of non-ferrous metal elements, but there are many kinds of non-ferrous alloys with different properties. The strength and hardness of non-ferrous alloys are generally higher than that of pure metals, the resistance is larger than that of pure metals, the resistance temperature coefficient is small, and they have good comprehensive mechanical properties. Commonly used non-ferrous alloys are aluminum alloys, copper alloys, magnesium alloys, nickel alloys, tin alloys, tantalum alloys, titanium alloys, zinc alloys, molybdenum alloys, zirconium alloys and so on.
Uses:
A:Copper among non-ferrous metals is one of the first metal materials used by mankind. In modern times, non-ferrous metals and their alloys have become indispensable structural and functional materials in the fields of machinery manufacturing, construction, electronics industry, aerospace, nuclear energy utilization and so on.
B:In practical application, non-ferrous metals are usually divided into 5 categories:
1.Light metals. Density less than 4500 kg/m3, such as aluminum, magnesium, potassium, sodium, calcium, strontium, barium and so on.
2.Heavy metals. Density greater than 4500 kg/m3, such as copper, nickel, cobalt, lead, zinc, tin, antimony, bismuth, cadmium, mercury and so on.
3. Precious metals. More expensive than the general use of metals, low abundance of crust, purification difficulties, such as gold, silver and platinum group metals.
4. Semi-metal. The nature of the price of metal and non-metal, such as silicon, selenium, tellurium, arsenic, boron and so on.
5. Rare metals. Including rare light metals, such as lithium, rubidium, cesium and so on;
Rare refractory metals, such as titanium, zirconium, molybdenum, tungsten and so on;
Rare dispersed metals, such as gallium, indium, germanium, thallium and so on;
Rare earth metals, such as scandium, yttrium, lanthanum metals;
Radioactive metals, such as radium, francium, polonium, and uranium and thorium in the alphas.
