The company adheres to the service concept of "you give the order to me and I leave the satisfaction to you". Over the years, our ASTM A709 bridge steel plate steel products are supplied in time, with reliable quality and perfect and thoughtful after-sales service. Meanwhile, we have huge ASTM A709 bridge steel plate steel stocks all the year round. The company long-term pursues the principle of quality first, customer first, quality for survival, reputation for development, and perfect service to win the users.
ASTM A709 bridge steel plate surface cracks refer to the linear cracks on the surface of ASTM A709 bridge steel plate, which should generally be the same as the forging or rolling direction. Formation reason: it is mainly due to the hairline, hot crack and cold crack caused by surface over burning, decarburization, looseness, deformation and excessive internal stress during processing (forging, rolling, heat treatment, quenching and tempering), as well as the high content of sulfur and phosphorus impurities on the surface. Inspection method: ASTM A709 bridge steel plate surface cracks can be detected by naked eye observation, acid pickling, magnetic particle inspection, coloring inspection and metallographic method.
Corrosion resistant steel is a kind of stainless steel, which can resist corrosion in some strong corrosive media. Stainless steel can only resist corrosion in air or weak medium. Stainless steel is not necessarily corrosion resistant, corrosion-resistant steel must be stainless steel. Corrosion resistant steel is durable and can be stored outdoors for a long time without being damaged in bad weather. Corrosion resistant steel is not easy to rust, but it is not absolutely rust free. The strength, precision and toughness of ASTM A709 bridge steel plate, corrosion resistant steel are very good, and can be the processed and used for many purposes.
Molybdenum is a well known alloy element. Molybdenum can refine the grains of steel material, improve the hardenability and thermal strength, and maintain sufficient strength and creep resistance at high temperature. Adding molybdenum to ASTM A709 bridge steel plate, structural steel can improve mechanical properties. Molybdenum can also restrain the brittleness of alloy steel caused by quenching treatment.
ASTM A709 bridge steel plate, Q690C high strength steel structural quality: plate specification(mm) 14*1760*7940, 14*2405*7610, 19.05*2186*12200, 28.58*2171*12000, 40*1500*12000, 20*1820*7700, 60*2400*10500, 22.23*2070*12000, 22.23*2180*12200, 40*1510*12000, 14*1600*7400, 75*1800*3500, 19.05*2150*12000, 28*2170*12000, 20*2200*11900,19*2000*12000, 65*2000*3400, 22.23*2075*12000, 12*1730*7140, 20*2200*10200, 22.23*2170*12200, 59*2950*10000.
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