High Pressure Alloy Steel Pipe
Jan 29, 2024
Alloy Steel Pipe Supplier-GNEE
High-pressure alloy steel pipe material: 12Cr1MoV (G), 13CrMo44 (A335P12, STFA22, 15CrMo), 10CrMo910 (A335P22, 12Cr2Mo, STFA24), A335P5 (STFA25, Cr5Mo), A335P9 (Cr9Mo, STFA26), A335P91 (T91), A335P9 2.WB36 (15NiCuMoNB5), Gangyan 102 (12Cr2MoWVTiB), 1Cr5Mo, 30CrMo, 35CrMo, 40CrMo, 42CrMo, 38CrMoAL
The materials of alloy pipes are roughly:
10#, 20#, 35#, 45#, 16-50Mn, 27SiMn, 40Cr, 12-42CrMo, 16Mn 12Cr1MoV T91 27SiMn 30CrMo 15CrMo 20G Cr9Mo 10CrMo910 15Mo3 15CrMoV 35CrMoV 45CrMo
The meaning of each element and symbol in alloy steel pipe material
The steel grade, referred to as steel grade, is the name given to each specific steel product and is a common language for people to understand steel. The method of expressing steel numbers in my country generally uses a combination of Chinese pinyin letters, chemical prime symbols and Arabic numerals.
Below we will introduce in detail the meaning of each element and symbol in the alloy steel pipe material.
1. The two digits at the beginning of the steel number indicate the carbon content of the steel, expressed as a few ten thousandths of the average carbon content, such as 40Cr.
2. The main alloying elements in steel, except for a few microalloying elements, are generally expressed in percentages. When the average alloy content is less than 1.5%, the steel number is generally marked with the element symbol instead of the content. However, in special circumstances that may cause confusion, the number "1" can also be marked after the element symbol, such as the steel number. "12CrMoV alloy steel pipe" and "12Cr1MoV steel pipe", the former has a chromium content of 0.4-0.6%, the latter has a chromium content of 0.9-1.2%, and the other ingredients are all the same. When the average alloying elements contain ≥1.5%, ≥2.5%, ≥3.5%... When , the content should be indicated after the element symbol, which can be expressed as 2, 3, 4, etc. accordingly. For example 18Cr2Ni4WA.
3. Alloying elements such as vanadium V, titanium Ti, aluminum AL, boron B, and rare earth RE in steel are all micro-alloying elements. Although the content is very low, they should still be marked in the steel grade. For example, the vanadium content in 20MnVB alloy pipe steel is 0.07-0.12%, and the boron content is 0.001-0.005%.
4. Advanced high-quality steel should be distinguished from general high-quality steel by adding "A" at the end of the steel number.
5. Special-purpose alloy structural steel, the steel number is preceded (or suffixed) by a symbol representing the purpose of the steel type. For example, 30CrMnSi steel specially used for rivet screws, the steel number is expressed as ML30CrMnSi.
6. For professional low-alloy high-strength steel, the steel number should be indicated at the end. For example, 16Mn steel, the special steel type used for bridges is "16Mnq", the special steel type used for automobile girders is "16MnL", and the special steel type used for pressure vessels is "16MnR".
