Alloy steel pipe element symbol meaning
Alloy steel pipe (alloy steel pipe) the biggest advantage can be 100%recovery, in line with environmental protection, energy saving, resourceconservation strategy, national policy to encourage the expansion ofhigh-pressure alloy pipe applications. Atpresent, China's total consumption of alloy pipe accounted for onlyhalf of the total amount of steel, alloy pipe to expand the use of thefield for the development of the industry to provide a broader space. Accordingto the China Special Steel Association alloy tube branch of the expertgroup of research, the future of China's high-pressure alloy pipelong-term demand growth of up to 10-12%. Alloypipe is in accordance with the production of materials (that is,material) to define, as the name suggests is the alloy pipe; andseamless pipe is in accordance with the production process (seamless) todefine, is different from the seamless tube is Sewing pipes, including straight seam welded pipe and spiral pipe.
Alloy steel pipe
Alloy steel pipe (2 sheets)
Alloy tube material generally have: 16-50Mn, 27SiMn, 40Cr, 12-42CrMo16Mn12Cr1MoV, T91 27SiMn 30CrMo 15CrMo 20G Cr9Mo 10CrMo910 15Mo3 15CrMoV35CrMoV 45CrMo, 15CrMoG, 12CrMoV, 45Cr, 50Cr, 45CrNiMo
Element symbol Meaning
Steelgrades are steel grades that are the names of each specific steelproduct and are a common language for people to understand steel. China's justification method is generally used in Chinese phoneticalphabet, chemical symbols and Arabic numerals combined with the methodthat
Here we specifically describe the alloy steel material in the elements and symbolic meaning
1, the beginning of the two figures indicate the carbon content ofsteel to the average carbon content of the number of said, such as 40Cr.
2, the main alloy steel elements, in addition to individual micro-alloying elements, the general expressed as a few percent. When the average alloy content <1.5%, steel
Generally only marked element symbols, but not marked content, but inspecial circumstances easy to confuse those in the element symbol canalso be marked with the number "1"
Such as steel "12CrMoV" and "12Cr1MoV", the former chromium content of0.4-0.6%, the latter is 0.9-1.2%, the rest of the same components
When the average content of alloy elements ≥ 1.5%, ≥ 2.5%, ≥ 3.5% ...,the elements should be marked after the content of the symbol can beexpressed as 2,3
, 4 ... and so on. Such as 18Cr2Ni4WA.
Alloy (2 sheets)
3, steel vanadium V, titanium Ti, aluminum AL, boron B, rare earth REand other alloying elements, are micro-alloying elements, although thecontent is very low, should still be in the steel
Marked out. For example, 20MnVB steel vanadium is 0.07-0.12%, boron 0.001-0.005%.
4, high-quality steel should be in the steel last plus "A" to distinguish it from the general high-quality steel.
5, the purpose of the use of alloy structural steel, steel crown (or suffix) on behalf of the use of steel signs. Such as riveting screw dedicated 30CrMnSi steel,
Steel is expressed as ML30CrMnSi.
6, the professional use of low-alloy high-strength steel, should be marked in the final steel. Such as 16Mn steel, for the bridge of special steel for the "16Mnq", steam
Car special beam for the special steel "16MnL", the pressure vessel for the special steel "16MnR".