T91 alloy tube is like a tree Ridge National Laboratory of the United States and the American Combustion Engineering Metallurgical Materials Laboratory cooperation in the development of the new martensitic steel. It is based on reducing the carbon content of steel 9Cr1MoV strictly limit the content of sulfur, phosphorus, and add a small amount of vanadium, niobium alloying elements. No. K90901 T91 T91 alloy tube alloy tube T91 alloy tube specifications: 8-1240 × 1-200mm T91 alloy tube Overview: T91 alloy tubes are boilers, heat exchangers heating and ferritic alloy steel seamless and Olympic (ASTM A213 / A213M-07a) uses: for low and medium pressure boiler (working pressure is generally not more than 5.88Mpa, operating temperature of the heating surface tubes below 450 ℃); a high-pressure boilers (above 9.8Mpa working pressure in general, the working temperature between 450 ℃ ~ 650 ℃) of heating surface tubes, economizer, superheater, reheater, petrochemical industrial pipe. T91 alloy tube heat: T91 final heat treatment for normalizing + tempering, normalizing temperature of 1040 ℃, holding time of less than 10 min, the tempering temperature is 730 ~ 780 ℃ import t91 alloy tube, holding not less than 1h, organized after the final heat treatment is tempered martensite. T91 steel before the post-weld heat treatment, cooling temperature is not lower than 100 ℃ t91 seamless, if the cooling Shanghai t91 alloy tube at room temperature, and the environment and more humid When, prone to stress corrosion cracking. In Germany: Before post weld heat treatment must be cooled to below 150 ℃. In the thicker workpiece, and the presence of fillet has geometry bad circumstances, the cooling temperature is not lower than 100 ℃. If the cooling at room temperature, non-humid, or prone to stress corrosion cracking t91 steel, Katherine source of steel (certified), Binzhou t91 provided by source Pipe Co., Ltd. Liaocheng trillion. Liaocheng Katherine source Pipe Co., Ltd. (www.lczygg.com) Shandong Liaocheng, steel leader, over the years, the company is implementing the scientific management, innovation and development, the principle of honesty and trustworthiness, and satisfy customer needs. Katherine source leader in steel with the staff warmly welcome all inquiries negotiations to create Katherine source steel a better future.