304 stainless steel plate has beautiful surface and diversified use possibilities, good corrosion resistance, longer durability than ordinary steel, 304 stainless steel plate has good corrosion resistance and high strength, so the possibility of thin plate use is high, high temperature oxidation resistance and high strength, so it can Fire-resistant and room temperature processing, that is, easy to plastic processing, because there is no need for surface treatment, it is simple, simple to maintain and clean, high smoothness and good welding performance.

The main difference in chemical composition between 316 and 304 is that 316 contains Mo, and it is generally recognized that 316 has better corrosion resistance and is more resistant to corrosion in high temperature environments than 304. Therefore, in high temperature environments, engineers generally choose 316 material components. But the so-called nothing is absolute. In a concentrated sulfuric acid environment, no matter how high the temperature is, do not use 316. We know that in order to prevent thread seizure at high temperatures, a dark solid lubricant needs to be applied.

304 stainless steel itself has a high yield point, high hardness, and significant cold work hardening effect. When 304 stainless steel plate is bent, its characteristics are as follows: because the thermal conductivity is worse than ordinary low carbon steel, the elongation is lower, resulting in a large deformation force; stainless steel The sheet material has a strong tendency to rebound compared with carbon steel when bending; due to the low elongation of stainless steel plate relative to carbon steel, the bending angle R of the workpiece during bending is greater than that of carbon steel, otherwise there is a possibility of cracks; 304 stainless steel plate has high hardness and significant cold work hardening effect. Therefore, when selecting bending tools, it is necessary to choose tool steels with heat treatment hardness above 60HRC. The surface roughness is an order of magnitude higher than that of carbon steel bending tools.

According to the above characteristics, in general: under unit size, the thicker the plate, the greater the bending force required, and as the plate thickness increases, the margin of bending force should be larger when selecting bending equipment; under unit size , The greater the tensile strength, the smaller the elongation, the greater the bending force required, and the greater the bending angle.

According to the actual situation, the expansion size of a bent workpiece is the addition of the right-angled edges minus two plate thicknesses, which can fully meet the design accuracy requirements. Calculating the expansion amount according to the empirical formula can simplify the calculation process and greatly improve production efficiency; the greater the yield strength of the material , The greater the amount of elastic recovery, in order to obtain a 90-degree angle of the bending piece, the smaller the angle of the pressing knife must be designed. Compared with the 304 stainless steel plate with the same thickness of carbon steel, the bending angle is larger. Special attention should be paid to this point. Otherwise, bending cracks will occur, which will affect the strength of the workpiece. It is always produced immediately when the flattened part is retreated from the punch, sometimes not when the drawing deformation is first bumped or vibrated when it is quiet; sometimes the drawing deformation first passes through a period of storage or application It happened during the process.