ASTM A335 alloy seamless steel pipe

ASTM A335 P11 seamless steel pipe, seamless ferritic alloy steel pipe for high temperature, used for the heating surface of the high-pressure boiler, economizer, header, superheater, reheater, petrochemical industry pipe, etc. It belongs to the category of seamless steel pipes. The manufacturing method is the same as that of the seamless pipe, but there are strict requirements on the steel type used in the manufacture of the steel pipe. High-pressure boiler tubes are often under high temperature and high-pressure conditions when used, and the tubes will be oxidized and corroded under the action of high-temperature flue gas and water vapor. It is required that the steel pipe has high strength, high resistance to reactive corrosion, and good preparation stability. High-pressure boiler tubes are mainly used to manufacture superheater tubes, reheater tubes, gas guide tubes, main steam tubes, etc. of high-pressure and very high-pressure boilers. A335 P11 Chemical Composition: C: 0.05~0.15 Si: 0.50~1.00 Mn: 0.30~0.60 P≤0.025 S≤0.025 Cr: 1.00~1.50 Mo: 0.44~0.65A335 P11 High-Pressure Boiler Tube Mechanical Properties: Tensile Strength≥415Map, Yield strength ≥ 205Mpa, elongation after fracture ≥ 30%, delivery status of A335 P11 pipe fittings: fully annealed or isothermal annealed, normalized + tempered. A335 P11 pipe fittings size: 60.3-765*2-120, commonly used diameters 60.3, 73, 88.9, 114.3, 168.3, 219.1, 273.1, 323.9, 355.6, 406.4, 457.2, 508, 559, 610, 660, 711, 762, and other sizes can also be customized according to customer requirements.

The main application of A335 P11 seamless alloy steel pipe: seamless alloy steel pipe is used in petrochemical boilers, superheaters, and heat exchangers. P11 is a low-alloy heat-resistant steel, which belongs to alloy steel. According to the production process, P11 can be divided into two types: hot-rolled seamless steel pipe and cold-rolled seamless steel pipe, among which cold-rolled pipe is divided into round pipe and special-shaped pipe. The production process of hot-rolled seamless steel pipe is round tube billet, heating, perforation, three-roll oblique rolling, continuous rolling or extrusion, tube removal, stem fixing, cooling, blank tube, straightening, hydraulic test, marking, and storage. The production process of cold-rolled seamless steel pipe is round tube billet, heating, perforation, heading, annealing, pickling, oiling, multi-pass cold drawing, billet tube, heat treatment, straightening, hydraulic test, marking, storage, general Boiler tubes are mainly used to manufacture water wall tubes, boiling water tubes, superheated steam tubes, superheated steam tubes for locomotive boilers, large and small smoke tubes, and arch brick tubes, etc. High-pressure boiler tubes are mainly used to manufacture superheater tubes, reheater tubes, gas guide tubes, main steam tubes, etc. of high-pressure and very high-pressure boilers.