HAZ embrittlement is often caused by 16Mn straight seam steel pipe fracture, induced root cause catastrophic accidents. Partial embrittlement has two main regions q345b seamless, that the heat affected zone CGHAZ embrittlement is q345b seamless pipe prices due to over-grown grains overheated zone and the formation of undesirable tissue caused by the multi-layer welding When CGHAZ again critical embrittlement, which is heated again before CGHAZ by subsequent weld bead caused by the two-phase region. This is done by adding a certain amount in the steel Ti, Nb micro-alloying elements and control weld cooling rate to get the right t8 / 5 to improve toughness. With 16Mn straight seam to reduce the carbon content of the steel pipe, welded reduced susceptibility to hydrogen-induced cracking, in order to avoid cracking process measures needed to reduce q345b seamless, reducing the extent of damage the performance of the weld heat affected zone. However, due to the welding seam steel 16Mn straight through a series of complex physical and chemical non-equilibrium process, which may cause defects in the weld zone, or the joint performance degradation, mainly weld cracking problem and HAZ embrittlement problem. Standard: general structure seamless steel pipe: (GB / T8162-1999) transmission fluid with seamless steel pipe: (GB / T8163-1999) low-pressure boiler seamless steel pipe: (GB / T3087-1999) high-pressure boiler Seamless Steel Tube: (GB / T5310-1995) fertilizer seamless steel pipe: (GB / T6479-2000) petroleum cracking seamless steel pipe: (GB / T9948-1988) ship tube: (GB / T5312-1998), etc. and so now I have a lot alloy pipe, pressure pipe stock, will be price, wholesale and retail ways q345b seamless spot, to provide you with fast quality service, welcome new and old customers to negotiate, Power Conference. Note: 1, for your large supply of various special wall thickness, material seamless, cold drawn precision tubes and a variety of thermal expansion. 2. Our aim is: Let you save money, save time, save your money. q345b seamless steel pipe manufacturers _ _ Katherine source provided by the Xiangfan q345b Seamless Steel Tube Co., Ltd. Liaocheng Katherine source. Source Pipe Co., Ltd. Liaocheng trillion (www.lczygg.com) in this field pipe poured boundless enthusiasm and passion, Katherine source pipe has been customer-centric, the concept of creating value for customers, quality and service to win market and sincerely hope to cooperate with the community to create a successful, create brilliant. Related businesses welcomed the inquiry, contact: Manager Wu.