The four most widely used grades of alloy steel tubes are 12Cr1MoV, A335, P91, A335, P22, 15CrMoG
12Cr1MoVG alloy steel pipe, A335 P91 alloy steel pipe, A335 P22 alloy tube and 15CrMoG alloy tube, these four grades are the most widely used in alloy tube industry.
There are many types of alloy steel tubes, such as 20MnG, 25MnG, 15CrMoG, 35CrMo, 42CrMo, 12Cr2MoG, 12Cr1MoVG, 12Cr2MoWVTiB, 10Cr9Mo1VNb, 10CrMoAl, 9cr5mo.9cr18mo, SA210A1, SA210C, SA213 T11, SA213 T12, SA213 T22, SA213 T23, SA213 T91, SA213 T92, A335 P9, A335 P11, A335 P12, A335, P22 A335 P23, A335 P91, A335 P92, ST45.8/, 15Mo3, 13CrMo44, 10CrMo910 III.
12Cr1MoV alloy steel pipe is based on high-quality carbon structural steel, the appropriate to join one or several alloy elements, used to improve the mechanical properties of steel, toughness and hardenability. The products made of such steel are usually subjected to heat treatment (normalizing or quenching and tempering); their zero parts are usually subjected to quenching or surface chemical treatment (carburizing, nitriding, etc.) before use, Quenching or high-frequency quenching and other treatment. Therefore, depending on the chemical composition (mainly carbon content), heat treatment process and the use of different, such steel can be divided into carburizing, quenching and tempering and nitriding steel.
A335 P91 alloy steel pipe is a solid tube through the perforated after rolling. A335 P91 alloy tube is widely used. General use of the P91 alloy tube by the ordinary carbon structural steel, low-alloy structural steel or alloy structural steel rolling, the largest output, mainly used for conveying fluid pipe or structural parts.
A335 P22 alloy steel pipe is the use of seamless steel pipe material standards, and UNS 21950 is the same material, but the processing process is not the same. The process flow is: round pipe → heating → perforation → start → annealing → pickling → oil (copper) → multi-pass cold drawn (cold) → billet → heat treatment → straightening → water pressure test (flaw detection) → mark → storage
15CrMoG alloy steel pipe specifications: 8-1240 × 1-200mm, mainly used for low and medium pressure boilers (working pressure is generally not greater than 5.88Mpa, the working temperature below 450 ℃) heating surface pipe; for high pressure boiler (working pressure is generally 9.8Mpa above, the working temperature between 450 ℃ ~ 650 ℃) of the heating surface of the pipe, economizer, superheater, reheater, petrochemical industry, and so on.