Metallic materials are generally classified as ferrous metals, non-ferrous metals, and specialty metal materials.
1 Ferrous metals, also known as iron and steel materials, include industrial pure iron containing over 90% iron, cast iron containing 2% to 4% carbon, carbon steel containing less than 2% carbon, and structural steels, stainless steel, and heat-resistant for various purposes. Steel, high-temperature alloys, precision alloys, etc. The broad ferrous metals also include chromium, manganese and their alloys.
2 Non-ferrous metals are all metals and their alloys except iron, chromium, manganese, which are usually divided into light metals, heavy metals, precious metals, semi-metals, rare metals, and rare earth metals. Non-ferrous alloys generally have higher strength and hardness than pure metals. And the resistance is large and the temperature coefficient of resistance is small.
3 Special metal materials include structural metal materials and functional metal materials of different uses. Among them are amorphous metal materials obtained through rapid condensation process, as well as quasi-crystal, microcrystalline, nanocrystalline metal materials, etc.; and special function alloys such as stealth, hydrogen resistance, superconductivity, shape memory, wear resistance, damping and damping, etc. And metal matrix composites.