There are several classifications: 1. Basic metal VS precious metals. In non -ferrous metal branches, the unit price of non -ferrous metals can be divided into "basic metals" (such as copper, aluminum lead, nickel nickel, etc.) and "precious metals" (such as gold and silver platinum 钯, etc.). 2. Soft products. Refers to the commodities (such as pigs, wheat, eggs, etc.) obtained through breeding or planting through natural extraction or mining. 3. Black metal refers to metal types mainly containing iron, manganese, and chromium. Among them, the most applications are steel. According to the chemical composition, the carbon content can be divided into low -carbon steel, medium -carbon steel and high -carbon steel.
There are several classifications:
1. Basic metal VS precious metals. In non -ferrous metal branches, the unit price of non -ferrous metals can be divided into "basic metals" (such as copper, aluminum lead, nickel nickel, etc.) and "precious metals" (such as gold and silver platinum 钯, etc.).
2. Soft products. Refers to the commodities (such as pigs, wheat, eggs, etc.) obtained through breeding or planting through natural extraction or mining.
3. Black metal refers to metal types mainly containing iron, manganese, and chromium. Among them, the most applications are steel. According to the chemical composition, the carbon content can be divided into low -carbon steel, medium -carbon steel and high -carbon steel.