Stainless steel precision tube is generally used in precision instruments or medical devices, not only the price is relatively high, but also usually used in key equipment and instruments, so the material and precision requirements of precision stainless steel tube and surface finish requirements are very high. Usually civil precision stainless steel pipe 301 stainless steel, 304 stainless steel, 316 stainless steel, 316L stainless steel, 310S stainless steel. My factory generally produces quite NI8 material, that is, quite 304 material, my factory doesn’t produce low material precision stainless-steel tube customarily, will put 201,202 called stainless iron, due to its magnetic, suction to the magnet. 301 is additionally non-magnetic, but becomes magnetic after cold work and attracts magnets. 304,316 non-magnetic, no suction to magnet, non-viscous magnetic.
The main reason is that chrome steel contains chromium, nickel and other elements in several proportions and metallographic structure. Combined with the above characteristics, the utilization of magnets to guage the standard of stainless-steel is additionally a feasible method, but this method isn’t scientific, because the assembly process of chrome steel, cold pull, hot pull, post-processing is healthier, less or no magnetic, not good, the magnetic is larger, reflect the purity of chrome steel. Users can even judge from the packaging of precision chrome steel tube, appearance: rough, uniform thickness, whether there are spots on the surface and then on.
Post time: Dec-23-2021