Notice of 304 stainless steel plate in bending process

by yane Yang Sales Manager

304 stainless steel plate is more durable than ordinary steel, its surface is beautiful and the application of various forms, excellent corrosion resistance, but also high temperature oxidation, high strength, can be fire-resistant, so the production of stainless steel plate More likely. In addition, the stainless steel plate can be plasticized and processed at room temperature without surface treatment.

316 and 304 compared to the main difference between stainless steel chemical composition, including 316 stainless steel containing molybdenum, stainless steel in general 316 stainless steel corrosion resistance is better, better corrosion resistance in high temperature 304 stainless steel. Therefore, in high temperature environment, engineers usually choose 316 stainless steel for production. But not necessarily, in the case of concentrated sulfuric acid, the temperature is too high can not use 316, because in order to avoid the threads at high temperatures bite, to apply a dark solid lubricant.

304 stainless steel because of its high yield point, the hardness is high, cold hardening effect is obvious, 304 stainless steel bending process is characterized by poor thermal conductivity due to ordinary low carbon steel, the elongation is low, resulting in deformable board required Compared with carbon steel, the large and stainless steel sheets tend to rebound strongly compared with carbon steel during bending, and their elongation relative to carbon steel is also low. Therefore, the bending angle R of the stainless steel workpiece during bending is higher than that of carbon steel, Otherwise there will be cracks may occur. Because of the high hardness of 304 stainless steel, cold work hardening effect is significant, so choose the bending tool should choose the heat treatment up to 60HRC hardness of the tool steel, and its surface roughness than carbon steel bending tool an order of magnitude higher.

According to the above characteristics, generally speaking, the unit size, the thicker the stainless steel plate, the greater the required bending force, and as the thickness increases in the choice of bending equipment, the bending force margin should be stronger, In the unit size, the higher the tensile strength of the board, the lower the elongation, the greater the required bending force, the greater the bending angle.

According to the actual situation, the unfolding dimension of a bent workpiece is the addition and subtraction of two thickness at right angle, which can fully meet the design precision requirements. Based on experience and formula, the calculation of unfolding quantity can simplify the calculation process and greatly improve the production efficiency. The greater the yield strength of the material, the greater the elastic recovery, in order to get the angle of 90 degrees of the bending piece, the angle of the required pressure knife should be designed smaller. Relative to the same thickness of 304 stainless steel plate bending angle, which requires great attention, will generate bending cracks, which will affect the strength of stainless steel workpiece.

Source: China Stainless Steel Plate Manufacturer - Yaang Pipe Industry Co., Limited (www.yaang.com)