Katherine source pipe is in production, processing, storage and sales of integrated enterprise, annual sales of seamless pipe products factory and agency distribution: Cheng Gang, Xining, Baotou, Tianjin Steel, Steel and other major steel mills Spot quality seamless pipe, alloy pipe, large diameter thick-walled seamless pipe, galvanized pipe, stainless steel and other steel products; made of: 20 #, 35 #, 45 #, 16Mn, 27SiMn, 40Cr, 35CrMo, 12Cr1MoV, 15CrMoG, 42CrMo, 30CrMo, 38CrMoAl, 25CrMnMo, P110, P91, N80, etc. t91 seamless implementation of standards: precision light pipe (GB3639-2008), structural pipe (GB8162-2008), fluid pipe (GB8163-2008), low-pressure boiler pipe (GB3087-2008), high-pressure boiler pipe (after GB5310-2 T91 requires welding cooled to below the Ms point and maintain a certain time to be tempered after welding cooling rate of 80 ~ 100 ℃ / h If without insulation, austenite joints may not be completely transformed t91, tempering heating will lead along the austenite grain boundary carbide precipitation Shanghai t91 alloy tube, such organizations are crisp but not allowed to weld T91 cooled to room temperature and then tempered, because it is dangerous welded joints have cooled cold cracking when the room temperature. For T91, the optimal starting temperature of 100 ~ 150 ℃, and incubated 1h, can be substantially completed to ensure that tissue transformation . t91 alloy, Katherine source of steel (certified), Pingxiang t91 by Katherine source Pipe Co., Ltd. Liaocheng. Liaocheng Katherine source Pipe Co., Ltd. (www.lczygg.com) Shandong Liaocheng, steel leader, over the years, the company implementation of scientific management, innovation and development, the principle of honesty and trustworthiness, and satisfy customer needs. In Katherine source steel leader with the staff warmly welcome all inquiries negotiations to create Katherine source of steel a better future.