ASTM A333 GR.6 SMLS Pipe, 2 Inch, SCH 40, 12 Meters, Black Coating Surafce, Beveled Ends.

Alloy pipes have hollow sections and are used in large quantities to transport fluids, such as oil, natural gas, gas, water and certain solid materials. Compared with solid steel such as round steel, alloy steel pipe has light weight when bending and torsion strength is the same. Alloy steel pipe is an economical section steel, which is widely used in the manufacture of structural parts and mechanical parts, such as oil drill pipe, automobile drive shaft, bicycle frame and steel scaffolding used in construction. Making ring parts with alloy steel pipe can improve the utilization ratio of materials, simplify the manufacturing process, save materials and processing hours, such as rolling bearing ring, Jack sleeve and so on. At present, steel pipe has been widely used to manufacture. Alloy steel pipe is also an indispensable material for all kinds of conventional weapons, barrel, barrel and so on must be made of steel pipe. Alloy steel pipe can be divided into circular pipe and special-shaped pipe according to the shape of cross-sectional area. Because the circular area is the largest under the condition of equal circumference, more fluid can be transported by circular pipe. In addition, the ring section under internal or external radial pressure, the force is more uniform, therefore, most of the steel pipe is a circular pipe.

For professional low alloy high strength steel, it should be marked at the end of the steel number. Such as 16 Mn steel, the special type of steel for bridge is "16 Mnq", special type of steel for automobile girder "16 MnL", special type of steel for pressure vessel "16 MnR".

high quality steel should be added "A"," at the end of the steel number to distinguish it from general high quality steel.

. Main alloying elements in steel, Except for individual microalloy elements, Generally expressed as a few percent. And when the average alloy <1.5%, In steel, only element symbols are usually marked, Without indicating the content, But in exceptional circumstances, The element symbol may also be marked with the number "1", Such as steel "12 CrMoV" and "12 Cr1MoV", The chromium content of the former is 0.4-0.6%, The latter is 0.9-1.2 per cent, All the other ingredients are the same, When the average content of alloying elements ≥1.5%,≥2.5%,≥3.5%…… The content should be marked after the element symbol, 2,3,4... For example Cr2Ni4WA.18