Stainless steel
Stainless steel refers to steel that is resistant to weak corrosion media such as air, steam and water and chemical etching media such as acid, alkali and salt, also known as stainless acid resistant steel. In practical applications, steel resistant to weak corrosion medium is often called stainless steel, while steel resistant to chemical medium is called acid resistant steel.
Stainless steel features:
Weldability. The requirements for weldability vary with the use of the product.
The vast majority of stainless steel products require good corrosion resistance, and some foreign businessmen also do corrosion resistance tests on products.
Nowadays, stainless steel products on the market usually go through the process of polishing during production.
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Copper
Copper is a kind of metal with purple red luster. It is slightly hard, extremely tough, wear-resistant, and has good ductility, good heat conductivity, conductivity and corrosion resistance. Due to its abundant reserves in nature, excellent performance and convenient processing, copper is second only to aluminum in the consumption of nonferrous metal materials in China, and is widely used in electrical, machinery manufacturing, construction industry, transportation and other fields.
Copper features:
Good ductility, high thermal conductivity and conductivity, diamagnetic, durable, and the flame of copper is green.
Copper has strong corrosion resistance. Compared with aluminum, copper is more resistant to non oxidizing acids, alkalis, seawater, etc., but aluminum is more resistant to corrosion than copper in atmosphere, weak acid and other media.
Copper has good plasticity and can withstand cold and hot pressure processing with large deformation, such as rolling, extrusion, forging, etc.
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Carbon Steel
Carbon steel is an iron carbon alloy with a carbon content ranging from 0.0218% to 2.11%. Also known as carbon steel. Generally, it also contains small amounts of silicon, manganese, sulfur, and phosphorus. The higher the carbon content in general carbon steel, the greater the hardness and strength, but the lower the plasticity.
Carbon Steel features:
Belonging to eutectoid steel and hypereutectoid steel, it has high strength and hardness, good wear resistance, and is suitable for manufacturing various low-speed cutting tools.
Mainly used for manufacturing important mechanical parts with complex shapes, high mechanical performance requirements, and difficult to form by forging and other methods in the process, such as gearbox shells of automobiles, hooks and couplings of locomotives and vehicles, etc
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Alloy steel
Alloy steel is called alloy steel when other alloy elements are added in addition to iron and carbon. An iron carbon alloy formed by adding one or more alloy elements on the basis of ordinary carbon steel. According to the different elements added and the appropriate processing technology, high strength, high toughness, wear resistance, corrosion resistance, low temperature resistance, high temperature resistance, non-magnetic and other special properties can be obtained.
Alloy steel features:
It has higher strength and toughness than carbon steel, and its strengthening effect tends to be obvious with the increase of structural imbalance.
The hardenability of alloy steel mainly depends on the carbon content, which is slightly higher than that of carbon steel with the same carbon content, but the hardenability and tempering stability of alloy steel are significantly improved.
The price of alloy steel is relatively responsible, and the forming process and heat treatment process are also complex.
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Aluminum
Aluminum is a metal element with the symbol Al and atomic number 13. Its simple substance is a silver white light metal. It is malleable. Goods are often made into rods, sheets, foils, powders, ribbons and filaments. It can form an oxide film to prevent metal corrosion in humid air.
Aluminum features:
Aluminum is a light metal, and its density is only about one third that of iron. The treated aluminum alloy is tough and easy to stretch. With metallic luster, the surface is silver white and shiny when it is smooth.
The ability to reflect visible light is strong (about 92%), and the reflection of medium and far infrared can reach 98%. Aluminum is easy to machine, cut and shape.
Aluminum has good conductivity (59% of copper), which is much lighter than copper. Aluminum can superconduct at a temperature lower than 1.2K and a magnetic flux greater than 100 Gauss.
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