Classification of metals Ferrous metals
Classification of metals Ferrous metals: usually referr […]
Classification of metals Ferrous metals: usually referred to as iron, manganese, chromium and their alloys (mainly steel). Manganese and chromium are mainly used in alloy steels, and the steel surface is often covered with a layer of black ferroferric oxide, so iron, manganese, chromium and their alloys are called ferrous metals. This classification is mainly based on the fact that steel occupies a very important position in the national economy. Non-ferrous metals: Usually refers to metals other than ferrous metals.
Non-ferrous metals can be divided into four categories:
(1) heavy metals such as copper, zinc, lead, nickel, etc.;
(2) Light metals such as sodium, calcium, magnesium, aluminum, etc.;
(3) precious metals such as gold, silver, platinum, rhodium, etc.;
(4) Rare metals such as antimony, bismuth, antimony, uranium, etc.