Generally, the production process of S355J2 S355K2 S420J0 materials 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.
WTST 37-3 steel plate is a kind of carbon steel plate. WTST 37-3 steel plate can be used to build low temperature sea water resistant containers. When the customer orders S355J2 S355K2 S420J0 materials WTST 37-3 steel plate from us, our factory should roll it in full accordance with SEW 087-2 specification, and the factory will issue the original mill test certificate for inspection before delivery.
Temperature has a great influence on the strength of the material, S355J2 S355K2 S420J0 materials. When the temperature exceeds a certain value, the strength limit of the steel will be reduced. The higher the temperature, the lower the strength. In addition, the longer the steel is used at high temperature, the lower the strength. Therefore, if the steel works at high temperature for a long time, the instantaneous strength of the steel can not be used as its performance index, nor can the room temperature performance replace the high temperature performance.
The BBN Steel double-gantry boring and milling machining center has a length of 50 meters, a width of 8 meters, and a height of 7 meters. It is equipped with a rotary table with a diameter of 6 meters, which can process 5 faces at a time. The double column and rotary table can achieve 7 Axis 5 linkage can well meet the S355J2 S355K2 S420J0 materials processing needs of high-tech fields such as machinery, metallurgy, nuclear power, gas turbine, and aviation.