Supply Chengde SA335P91 American standard steel pipe [spot] Wuxi Haoyi alloy products Co., Ltd. spot P91 alloy pipe P91 boiler pipe P91 seamless pipe
Features of P91 alloy pipe: it has not only high oxidation resistance and high temperature steam corrosion resistance, but also good impact toughness, high and stable durable plasticity and thermal strength. When the service temperature is lower than 620 ℃, the allowable stress is higher than that of austenitic stainless steel. Above 550 ℃, the recommended design allowable stress is about twice that of T9 and 2.25Cr-1Mo steel.
Application of P91 alloy pipe: it can be used as steel pipe for high temperature superheater and reheater with wall temperature ≤ 625 ℃ of subcritical and supercritical boiler, as well as high temperature header and steam pipe with wall temperature ≤ 600 ℃, as well as nuclear electric heat exchanger and furnace pipe of petroleum cracking unit.
P91 alloy pipe standard: ASTM A213 ASTM A335 tensile strength: ≥ 585 (MPA) yield strength: ≥ 415 (MPA) elongation: ≥ 20 (%). P91 not only has high oxidation resistance and high temperature steam corrosion resistance, but also has good 100 impact toughness, high and stable durable plasticity and thermal strength. When the temperature is lower than 620 ℃, the allowable stress is higher than that of austenitic stainless steel. Above 550 ℃, the recommended design allowable stress is about twice that of T9 and 2.25Cr-1Mo steel.
A335P91 alloy pipe is a pearlite structure heat-resistant steel, which has high thermal strength (δ B ≥ 440mpa) and oxidation resistance at high temperature, and has certain hydrogen corrosion resistance. Due to the high content of Cr, C and other alloy elements in steel, the hardening tendency of steel is obvious and the weldability is poor.
A335P91 alloy pipe weldability welding material: according to the weldability characteristics of 15CrMo steel, according to the previous experience and referring to the welding process card provided by foreign countries, we choose two schemes for welding test. Scheme I: welding preheating, er80s-b2l welding wire, T1G welding backing, e8018-b2 welding rod, electrode arc welding cover, local hot spot after welding
A335P91 alloy pipe is a pearlite structure heat-resistant steel, which has high thermal strength (δ B ≥ 440mpa) and oxidation resistance at high temperature, and has certain hydrogen corrosion resistance. Due to the high content of Cr, C and other alloy elements in steel, the hardening tendency of steel is obvious and the weldability is poor.
P91 alloy tube factory price straight