We also produce various sizes of section steel, the main production methods are hot rolling, cold rolling, extrusion, forging, cold drawing and so on. Profile products have complex cross-section shape and various specifications. According to the section height, it can be divided into large section steel, A709 Gr HPS70W bridge steel plate, medium and small section steel, H section steel, I section steel (I-section steel), U section steel (channel steel), l section steel (angle steel) and ball flat steel, etc. Profiles are widely used in various sectors of the national economy, such as I-beam is mainly used in building components, bridge manufacturing, ship manufacturing, etc.; channel steel is mainly used in building structures, vehicle manufacturing, etc;
The company specializes in the research and development, production and sales of A709 Gr HPS70W bridge steel plate seamless pipes, longitudinally welded pipes, large-diameter welded pipes, API 5L welded pipes, spiral welded pipes, and large-diameter thick-walled straight seam steel pipes. The company has A709 Gr HPS70W bridge steel plate five production lines in three major production workshops: large-diameter longitudinally welded pipe production workshop,A709 Gr HPS70W bridge steel plate rolled steel pipe production workshop, and thermally expanded steel pipe production workshop, with an annual production capacity of more than 100,000 tons.
Since the welding process is often used in the fabrication and processing of steel structures, it is very important for low-alloy high-strength steels of such purpose to be welded using the arc welding process that is widely used in thin thickness plates and steel strips. Yes, the welding seam of the steel structure should have the required strength and toughness, so as to withstand the most unfavorable conditions for the intended use. At present, the development of A709 Gr HPS70W bridge steel plate, low-alloy high-strength steels is carried out simultaneously with the development of various welding processes. Most low-alloy high-strength steels can be welded well.
The alloying principle of low alloy high strength steel plate mainly uses solid volume strengthening, fine grain strengthening and precipitation strengthening produced by alloy elements to improve the strength of low alloy high strength steel plate, A709 Gr HPS70W bridge steel plate. At the same time, the effect of fine grain strengthening on the reduction of ductile brittle transition temperature of low alloy high strength steel platel is used to offset the adverse effect of carbon nitride precipitation strengthening on the rise of ductile brittle transition temperature of steel, so that low alloy high strength steel plate can obtain high strength while maintaining good low temperature performance.
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