What is special steel?
It is generally believed that special steel refers to steel that has special chemical composition, is produced using special processes, has special organization and properties, and can meet special needs. Compared with ordinary steel, special steel has higher strength and toughness, physical properties, chemical properties, biocompatibility and process performance.
The definition of special steel in my country is relatively close to that of Japan and the European Union. Special steel is divided into three categories: high-quality carbon steel, alloy steel, and high-alloy steel (alloying elements greater than 10%). Among them, alloy steel and high-alloy steel account for the output of special steel. 70%. The main steel types include special carbon structural steel, carbon tool steel, carbon spring steel, alloy spring steel, alloy structural steel, ball bearing steel, alloy tool steel, high alloy tool steel, high-speed tool steel, stainless steel, and heat-resistant steel. , as well as high-temperature alloys, precision alloys, electrothermal alloys, etc.
In addition to the wide variety of special steels, special steels also show different characteristics from ordinary steels in terms of specifications. In addition to plates, tubes, wires, strips, rods and special-shaped materials, there are also composite materials, surface alloyed materials, surface-treated materials, precision forging materials, precision castings, powder metallurgy products, etc.
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