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Introduction of material standard of alloy steel pipe

author:Supeb(Shandong)Industry and Trade Co.,Ltd glance over: Publication time:2022/4/19 17:44:41

1. The main alloying elements in the steel of alloy steel pipe, except individual microalloying elements, are generally expressed in percentage. When the average alloy content is less than 1.5%, only the element symbol is indicated in the steel grades, but the content is not indicated. However, in special cases, the number "1" may be indicated after the element symbol, such as steel grades "12CrMoV" and "12Cr1MoV", the former containing 0.4-0.6% chromium and the latter 0.9-1.2% chromium.

2. ALloy elements such as vanadium V, titanium Ti, aluminum Al, boron B and rare earth RE in alloy steel pipes are all micro-alloy elements. Although the content is very low, they should still be marked in the steel grade. For example, in 20MnVB steel, vanadium is 0.07-0.12% and boron is 0.001-0.005%.

3. For alloy structural steel for special purposes in alloy steel pipes, the steel number is preceded (or suffixed) by a symbol representing the purpose of the steel grade.


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