Alloy steel pipe plant to introduce 42CrMo alloy steel pipe knowledge
42CrMo alloy steel tube containing alloying elements, vanadium V, titanium Ti, aluminum AL, boron B, rare earth RE and other alloying elements, are microalloying elements, the main purpose is for power plants, nuclear power, high pressure boilers, high temperature superheater and reheat High pressure and high temperature pipes and equipment.
The two numbers at the beginning of a steel number indicate the carbon content of the steel, expressed in parts per million of the average carbon content, such as 40Cr, 42CrMo steel alloy steel, the main alloying elements in the steel, in addition to individual microalloying elements, generally a few percent Indicated. When the average alloy content is less than 1.5%, the steel symbol is generally marked with only the symbol of the element but not the content, but it is easy to be confused under special circumstances. After the symbol of the element, it may be marked with the number "1", for example, steel. No. "12CrMoV" and "12Cr1MoV", the former has a chromium content of 0.4-0.6% and the latter has a content of 0.9-1.2%. The remaining components are all the same. When the average content of alloying elements is ≥ 1.5%, ≥ 2.5%, ≥ 3.5%, etc., the content shall be indicated after the element symbol, which may be expressed as 2, 3, 4...etc. For example 18Cr2Ni4WA.
(3) Alloying 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, in 20MnVB steel. Vanadium is 0.07-0.12% and boron is 0.001-0.005%.
4 High-quality steel should be added at the end of the steel grade to distinguish it from general high-grade steel.
5 special purpose alloy structural steel, steel crown (or suffix) represents the symbol of the steel use. For example, special 30CrMnSi steel for rivets, the steel number is ML30CrMnSi.
The alloy steel pipe knowledge information comes from the alloy steel pipe plant.