q235 steel weight | sunshine q235 steel | virtues of Industry

15CrMoG seamless steel pipe seamless steel 15CrMoG recyclable, environmentally friendly, energy saving, national strategies, national policy of saving resources to encourage the expansion of applications 15CrMoG seamless steel pipe. Half, 15CrMoG areas currently use our seamless steel pipe seamless steel 15CrMoG total steel consumption accounts only for the developed countries to expand the proportion of providing a broader space for development of the industry. 1. seamless steel pipe for its manufacturing process is different, is divided into hot-rolled (extrusion) two kinds of seamless steel tubes and cold drawn seamless steel (rolled). Cold drawn (rolled) pipe is divided into two kinds of circular pipe and shaped pipe. 2 a. Process Overview of hot-rolled (extruded seamless pipe): round tube → heating → perforation → three-roll rolling, rolling or extrusion → → set off pipe diameter (or reducing) → cooling → → straightening pipe billet → hydrostatic test (or testing) → mark → storage. Cold drawn (rolled) seamless steel pipe: round tube → heating → perforation → Heading → annealing → pickling → oiled (copper) → multi-pass cold drawn (cold) → billet tube heat treatment → → straightening → hydrostatic testing (testing) → mark → storage after heat treatment using welding program Ⅰ welded specimens should be local temperature tempering after welding. Heat treatment process: heating rate of 200 ℃ / h, rose to 715 ℃ heat 1 hour 15 minutes Material q235 steel, cooling rate 100 ℃ / h, down to 300 ℃ for air cooling. Specific use of JL-4 type crawler-type electric heater (1146 × 310) surrounding the weld, with layer silicate cotton insulation, insulation thickness 50mm, temperature control DJK-A-type electric heater automatic temperature control device. 2.1 welding materials for the working characteristics of 15CrMo steel weldability and high pressure piping scene, based on past experience, to provide reference to foreign steel welding card q235 weight, we have chosen two options for welding test. Program Ⅰ: welding preheat, using ER80S-B2L wire, T1G welding backing, E8018-B2 welding, SMAW cover up, local heat treatment after welding. Program Ⅱ: using ER80S-B2L q235 steel wire specifications, T1G welding backing, E309Mo-16 electrodes, welding arc is filled cover up, no heat treatment after welding q235 steel weight | sunshine q235 steel | pipe industry by virtue of virtue tube Liaocheng Industry Limited. Liaocheng virtue Pipe Co., Ltd. (www.meidegc.com) (www.meidegc.com) (www.mdwfg.com) (www.mdggc.com) strong, credible, Liaocheng in Shandong steel industry has accumulated a large number of loyal customers. The company better work attitude and constantly improving innovative ideas will lead virtue of Industry and you work into the brilliant, for a better future!