Now I have a lot of alloy pipe, pressure pipe, seamless pipe, seamless steel pipe shaped spot, will be preferential prices, wholesale and retail ways, to provide you with fast quality service, welcome new and old customers to negotiate, Power Conference. Company can build all kinds of special specifications, special materials seamless, timely delivery, low price, excellent quality, with a book or a copy of the original material, holiday business as usual, and agents Automotive, fire, transportation Shanghai t91 alloy pipe, large steel mills shipped directly. Also accept settlement. Company annual inventory in tons, with a strong, rich and complete specifications varieties t91, t91 seamless sound quality assurance, reasonable prices of imported t91 alloy tube, quality service, and are subject to the new and old customers and industry insiders recognition and trust, we have the spirit and the reach of the user, the user would like to think the purpose of serving constantly hard, aggressive, to express my sincere thanks to old and new friends over the years to support our businesses, we would like future cooperation more enjoyable! T91 weld tempering holding time of not less than 1 h, in order to ensure their organization is completely transformed into tempered martensite. In order to reduce the residual stress T91 steel welded joints, must control its cooling rate is less than 5 ℃ / min. T91 steel welding process is illustrated in Figure 3 shows. ① preheated 200 ~ 250 ℃; ② between welding, surface temperature 200 ~ 300 ℃; ③ After welding cooling rate of 80 ~ 100 ℃ / h; ④100 ~ 150 ℃ incubated 1 h; ⑤730 ~ 780 ℃ tempering 1 h; ⑥ not more than 5 ℃ / min speed cooling t91 alloy tube 51X3.5 | Katherine source steel (certified) | Matsubara 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.