Our marine steel CCS Grade A hot rolled plates, RINA grade A floating dock steel specification available now has 6*3300*4000, 5*1500*4500, 12*2700*9600, 9*3200*10400, 11*1790*7990, 6*3380*4600, 5*1500*11700, 12*2700*9000, 12.5*3390*9260, 13*1750*8400, 7*3620*9700, 12*2500*8350, 14.5*1830*6300, 15*3000*4200, 20*2750*5000, 7*1760*4250, 12*3000*10500, 12*3660*6070, 13*2000*4700, 13*2810*4100, 17*1910*7860, 12*2700*11450, 12*3800*9740.
Generally, the production process of RINA grade A floating dock steel seamless steel tube can be divided into cold rolling and hot rolling. The production process of cold-rolled seamless steel tube is generally more complicated than that of hot rolling. The tube blank must be first rolled by three rolls, and then be subject to sizing test and cutting after extrusion. Then enter the annealing process. In appearance, the cold-rolled seamless steel tube is shorter than the hot-rolled seamless steel tube, and the wall thickness of the cold-rolled seamless steel tube is generally smaller than that of the hot-rolled seamless steel tube, but the surface looks brighter than the thick wall seamless steel tube, the surface is not too rough, and the diameter is not too much burr.
Both steelmaking and ironmaking are carried out by oxidation-reduction reaction, but there are great differences between them in reaction objects: ironmaking is to reduce iron, while RINA grade A floating dock steel steelmaking is to remove excessive carbon and other impurities in pig iron, so there are relations and differences between them in actual operation. There are three main methods of RINA grade A floating dock steel steelmaking: converter, electric furnace and flat furnace. The converter steelmaking process is most widely used.
Customer first, reputation first, high-quality and perfect after-sales service is the extension of our product value and an important guarantee for the interests of customers. The purpose of our RINA grade A floating dock steel service quality management system is to establish and constantly improve a scientific, reasonable and efficient service quality management system, and complete the after-sales service quality guarantee work of customers fairly, accurately and timely, For our company's RINA grade A floating dock steel customer service to establish a good, comprehensive, full service system.
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