Mechanical properties of 35crmo alloy tubes
The two digits at the beginning of the 35crmo alloy steel pipe 1 indicate the carbon content of the steel, expressed as a few ten thousandth 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 <1.5%, the steel symbol is generally only marked with the symbol of the element, and the content is not indicated, but in the special case, it is easy to cause confusion. The element symbol can also be marked with the number "1", for example, the steel number. "12CrMoV" and "12Cr1MoV", the former has a chromium content of 0.4-0.6%, the latter has a 0.9-1.2%, and the remaining components are all the same. When the average content of alloying elements is ≥1.5%, ≥2.5%, ≥3.5%..., the content should be indicated after the element symbol, which can be expressed as 2, 3, 4, etc. For example, 18Cr2Ni4WA.
The alloying elements such as vanadium V, titanium Ti, aluminum AL, boron B, and rare earth RE in steel are all microalloying elements. Although the content is very low, they should be marked in the steel number. For example, in 20MnVB steel. The vanadium is 0.07-0.12% and the boron is 0.001-0.005%.
4 high-quality steel should be added "A" at the end of the steel number to distinguish it from ordinary high-quality steel.
5 Special purpose alloy structural steel, steel crown with (or suffix) represents the symbol of the use of the steel. For example, 30CrMnSi steel for rivet screw, steel number is expressed as ML30CrMnSi.
Alloy tubes and seamless tubes have both a relationship and a difference, and cannot be confused. People's website
The alloy pipe is defined by the production material (that is, the material). As the name suggests, it is the pipe made of alloy; and the seamless pipe is defined by the production process (seam seamless), which is different from the seamless pipe. There are seam pipes, including straight seam welded pipes and spiral pipes.
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