Recently, the reporter learned from the enterprise of Tianjin Port Free Trade Zone, New Tianjin Steel Decai Technology Group, its subsidiary Tiancai Technology Development Co., Ltd. (hereinafter referred to as "Tiancai Technology") has constantly challenged R&D of ceiling with hand-torn steel, and successfully developed SUS304 stainless steel foil with a thickness of only 0.039mm thick and a width of 600mm.
　　Hand-torn steel is a kind of wide ultra-thin precision stainless steel strip. The production technology of this kind of precision stainless steel strip is recognized as advanced technology in the field of stainless steel cold rolling in the world. As the lightest stainless steel strip, it can be widely used in aerospace, high-end automobile decoration, electronic communication and other fields. It is reported that in the production process of hand-torn steel, due to the problems that may occur, such as the difficulty in the control of dimensional accuracy of thin strip and plate shape, the difficulty of winding, the risk of belt breaking and annealing creases, the R&D team of Tiancai Technology plans the process in advance, formulates plans, controls the dimensional accuracy of roll, improves the coordination of the roll system, and ensures the production equipment.
　　Zhang Yinshan of Xintian Steel Group said that the successful production of 0.039mm "hand-torn steel" not only enhanced the Group's independent innovation ability, but also filled the gap in the market of such products in Tianjin.