Supply T91 T91 steel pipe seamless steel main business: seamless series: 20 #, 45 #, 16Mn / Q345B, 27SiMn, Cr5Mo (STFA25 STPA25 STBA25 T5 P5) 15CrMo (STFA22 STPA22 STBA22 T12 P12), Cr9Mo (STFA26 STPA26 STBA26 T9 P9) 12Cr1MoV (12CR1MOVG) 12Cr2Mo (10CrMo910 T22 P22) T91-ASTM A213 (P91-ASTM A335) 12Cr2MoWTiB (R102). A106B (ST45.8 / III, 20G) low temperature seamless steel: A333 (A334) Gr.1, Gr.6, Gr.3. Plant main feedwater pipe 15NICUMONB5 (WB36): 20G, 12Cr1MoV, 15CrMo (STFA22, STPA22, STBA22, T12, P12), P11 (STFA23, STPA23, STBA23, T11), Cr5Mo (STFA25, STBA25, STPA25, T5, P5), T91,10CrMo910 (P22,12Cr2Mo1), Cr9Mo (STFA26, P9) and so on. The sale of products implementing national standards, together for the construction, mining, textile, electric power, boilers, machinery, military and other various areas can be seen in the import t91 alloy tube, T91 low critical cooling rate, the austenite stability great t91, less likely to occur when the normal cooling pearlite transformation, which occurs when cooled to a lower temperature martensitic transformation. Because of this, T91 hardened and cold cracking tendency great. Since the heat-affected zone of a variety of tissues have different densities, different expansion coefficients and lattice form, in which the heating and cooling process is bound with different volumetric expansion and contraction; on the other hand, since the welding has a non-uniform heating and high temperature characteristics, and therefore a lot of internal stress of welded joints T91. For T91, t91 very stable austenitic seamless, to cool to a lower temperature (about 400 ℃) to become martensite. Coarse martensite brittle and hard, but in the joints under complex stress state. Meanwhile, the weld during cooling hydrogen from the weld seam zone near Shanghai spread to t91 alloy tube, the presence of hydrogen embrittlement prompted the martensite, the result of their combined effects, it is prone to cold cracking in the hardened area. t91 alloy tube manufacturers, Katherine source of steel (certified), Zigong 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.