Metal materials refer to materials with luster, ductility, easy conductivity, heat transfer and other properties. It is generally divided into ferrous metals and non-ferrous metals. Ferrous metals include iron, chromium, manganese, etc. Among them, steel is the basic structural material, which is called "the skeleton of industry". Due to the progress of science and technology and the wide application of various new chemical materials and new non-metallic materials, the substitutes of iron and steel are increasing, and the demand for iron and steel is relatively decreasing. But so far, the dominant position of iron and steel in the composition of industrial raw materials is still difficult to replace.
Metal materials are usually divided into ferrous metals, non-ferrous metals and special metal materials.
① Ferrous metals, also known as iron and steel materials, include industrial pure iron with total impurity content less than 0.2% and carbon content no more than 0.0218%, steel with carbon content of 0.0218% ~ 2.11%, and cast iron with carbon content greater than 2.11%. Ferrous metals in a broad sense also include chromium, manganese and their alloys.Wholesale hot rolled 316LN steel sheet China made with stock
② Nonferrous Metals refer to all metals and their alloys except iron, chromium and manganese. They are usually divided into light metals, heavy metals, precious metals, semi metals, rare metals and rare earth metals. Nonferrous alloys generally have higher strength and hardness than pure metals, high resistance and low resistance temperature coefficient.AISI 1020 IC22 DIN 1.0402 Round Rod Alloy Steel Bars
③ Special metal materials include structural metal materials and functional metal materials for different purposes. There are amorphous metal materials obtained by rapid condensation process, quasicrystal, microcrystalline and nanocrystalline metal materials, etc; There are also special functional alloys such as stealth, hydrogen resistance, superconductivity, shape memory, wear resistance, vibration damping and metal matrix composites.
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