A709 grade 50W bridge steel plate 2020 stock in Zhengzhou: 8*2200*5730, 16*1800*6000, 18*2660*9600, 18.5*2320*6600, 70*2240*7600, 18.5*2320*6600, 9*2300*6870, 18.5*2320*6600, 14*2000*11181, 50*2410*8300, 85*2230*8100, 14*2000*11181, 6*2000*10000, 8*2200*5730, 70*2270*7470, 34*1300*4000, 16*1800*6000, 16*2000*10713, 12*2820*11500, 16*2000*10713, 15*2500*10000, 20*2150*9450, 14*2000*13500.
The large diameter cold drawn seamless steel pipe is a steel pipe with an outer diameter of more than 1000mm. The large diameter seamless steel pipe is made of steel ingot or solid billet through perforation and then hot rolling, cold rolling or cold drawing. If they are long, they need to remove the redundant parts, that is, cut them out. Their length A709 grade 50W bridge steel plate is suitable for the length required by the construction of steel pipes.
Winning the battle against pollution is a major political task. The Department of Ecology and Environment of Henan Province has issued the "Precise and Scientific Implementation Plan for Special Actions for the Prevention and Control of Air Pollution in Autumn and Winter". The "Plan" clarified the province's environmental air quality "consolidation, optimization, and improvement" governance goals, and proposed the reduction of coal combustion, industrial pollution control, diesel truck pollution control, urban and rural non-point source pollution control, and pollution weather response. The 10 key tasks have laid the foundation for the improvement of air quality during the 14th Five-Year Plan.
The main applications of normalizing are as follows:① For low carbon steel, A709 grade 50W bridge steel plate. The hardness of low carbon steel after normalizing is slightly higher than that after annealing, and the toughness is also better, so normalizing can be used as the pretreatment of cutting.② For medium carbon steel, normalizing can be used as the final heat treatment instead of quenching and tempering treatment, or as the preparation treatment before surface quenching by induction heating.③ Normalizing can be used in tool steel, bearing steel, carburizing steel and so on, which can eliminate or inhibit the formation of network carbide, thus obtaining the good microstructure needed for spheroidizing annealing.④ Normalizing can refine the cast structure and improve the machinability of steel castings.
