The company adheres to the "variety, quality and efficiency" road. We have established a technology center, a brand cultivation management system and a quality control system. Now the company has formed an independent innovation system integrating A709 Gr 50S bridge steel plate production, learning, research and marketing. Our company has passed ISO9001 quality management system certification and ISO10012 measurement management system certification.
Q345qD bridge steel plate stock list: Q345qD size (mm) 14*2680*10100, 14*1230*6300, 10*1800*14000, 16*2200*11300, 16*2200*11400, 16*2200*11600, 21.5*2440*12900, 64*2000*10000, 10*1500*7050, 30*2300*5700, 16*2200*12000, 25*2200*6800, 21.5*2440*4750, 30*2300*5800, 16*2200*10800, 12*2440*4850, 21.5*2440*4600, 25*3100*9400, 1, 30*2200*5050.
The surface quality of pickling coil is very good. Compared with ordinary hot-rolled plate, A709 Gr 50S bridge steel plate, the surface quality of hot-rolled pickling coil is improved in addition to the oxide scale on the surface, which is convenient for welding, oiling and painting. The accuracy of pickling coil specification is high. After leveling, the shape of the plate changes to a certain extent, thus reducing the deviation of unevenness, improving the surface finish and enhancing the appearance effect of pickling coil.
Hydrogen (H) is the most harmful element in general steel such as A709 Gr 50S bridge steel plate. Hydrogen dissolved in steel will cause hydrogen embrittlement, white spots and other defects. Hydrogen, like oxygen and nitrogen, has very little solubility in solid steel. It dissolves into liquid steel at high temperature, and accumulates in the structure without time to escape when cooling, forming high-pressure micro pores, which greatly reduce the plasticity, toughness and fatigue strength of steel, and even cause cracks and brittle fracture in severe cases. "Hydrogen embrittlement" mainly occurs in martensitic steel, but not very prominent in ferrite steel, and generally increases with hardness and carbon content.
The hardness of A709 Gr 50S bridge steel plate, wear-resistant steel plate is an important standard to measure wear resistance. The hardness of wear-resistant steel plate can be divided into microhardness and surface hardness. The microhardness of carbide in the wear-resistant layer of wear-resistant steel plate can reach over HVl700-2000, and the surface hardness can reach HRC58-62. Chromium alloy is the main wear-resistant layer of wear-resistant steel plate, and other alloy components such as manganese, molybdenum, niobium, nickel are added at the same time.
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