High strength steel is mainly used in offshore engineering, lifting equipment, construction machinery, container storage tank and other important steel structures with harsh working conditions, hoping to reduce weight. The application of A514 Grade Q alloy steel coil for hull structures, high strength steel can not only reduce material cost, transportation cost and production cost, but also save welding material consumption, welding work hour; reduce post welding stress, preheating temperature and post weld heat treatment requirements.
Q420FT steel implements the standard GB/T28410, which corresponds to S420 in EN10025. Q420FT steel plate is often used to make style electric towers. It has excellent functions and a completely neat board surface. A514 Grade Q alloy steel coil for hull structures, Q420FT steel plate is usually delivered in hot rolling, controlled rolling, normalizing rolling, normalizing, TMCP, TMCP+tempering, and the steel plate should be delivered with trimmed edges.
In order to better develop the international steel market and make the steel products trade more prosperous at home and abroad, the company has a number of professional talents who love their posts and are proficient in their business. The company has always been adhering to the "service first, reputation first, customer first, make friends" business purpose, is willing to work together with domestic and foreign customers!
Oxygen (O) is a harmful element in steel such as A514 Grade Q alloy steel coil for hull structures. Although manganese, silicon, iron and aluminum are added to deoxidize the steel at the end of steelmaking, they can not be removed completely. During the solidification of molten steel, the reaction of oxygen and carbon in the solution will produce carbon monoxide, which can cause bubbles. Oxygen mainly exists in the form of FeO, MnO, SiO2, Al2O3 and other inclusions in the steel, which reduces the strength and plasticity of the steel. Especially, it has serious influence on fatigue strength and impact toughness.