The alloy steel pipe plant in Shandong provides the elements in the alloy steel pipe material and the symbol meaning steel. The steel name is the steel name. It is the name for each specific steel product and is a common language for people to understand steel. In China, the method used to represent hard numbers generally uses the combination of Chinese Pinyin letters, chemical symbols, and Arabic numerals to represent the meaning of each element and symbol in the alloy steel material. Bimetallic Screw Barrel,Barrel Bimetal,Bimetallic Barrel,Bimetallic Screw Zhoushan Dinghai Jinsheng Bimetallic Plastic Machinery Factory (General Partners) , https://www.jinshenggalloy.com
1. The two digits at the beginning of the steel indicate the carbon content of the steel, expressed as a fraction of the average carbon content, such as 40Cr.
2. The main alloying elements in steel, except for individual microalloying elements, are generally expressed in percent. When the average alloy content is less than 1.5%, only the symbol of the element is generally marked in the steel number, but the content is not marked, but in special circumstances, it is easy to cause confusion. After the element symbol, the number “1†may also be marked, for example, the steel number. "12CrMoV" and "12Cr1MoV", the former chromium content of 0.4-0.6%, the latter is 0.9-1.2%, the remaining components are all the same when the average content of alloy elements ≥ 1.5%, ≥ 2.5%, ≥ 3.5% ... The content of the element symbol should be marked behind it, which can be expressed as 2, 3, 4...etc. For example 18Cr2Ni4WA.
3. Alloy elements such as vanadium V, titanium Ti, aluminum AL, boron B, and rare earth RE in steel are microalloying elements. Although the content is very low, they should be marked in the steel number. For example, vanadium is 0.07-0.12% in 20MnVB steel and boron is 0.001-0.005%.
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4, high-quality steel should be added at the end of the steel "A" to distinguish from ordinary high-quality steel.
5, special purpose alloy structural steel, steel crown (or suffix) represents the use of steel symbols. For example, special 30CrMnSi steel for rivets, the steel number is ML30CrMnSi.
6. For professional use of low-alloy high-strength steel, it should be marked at the end of the steel. For example, for 16Mn steel, special steel grades for bridges are “16Mnqâ€, special grades for automobile girders are “16MnLâ€, and special steel grades for pressure vessels are “16MnRâ€.
Shandong alloy steel pipe factory provides the meaning of each element and symbol in alloy steel pipe material