Generally speaking, 304 stainless steel is not magnetic, but why when you test a 304 stainless steel cup with a magnet, the cup shows a certain weak magnetism, and why does this happen? Did the factory deceive you? Made it for you with cheap stainless steel? The answer is no, because the internal structure of the 304 stainless steel cup has changed after continuous stretching, so it will also show a certain weak magnetism.
In regular 304 stainless steel is non-magnetic, but why when you use a magnetic
304 stainless steel (06Cr19Ni10) belongs to austenitic stainless steel. Austenitic stainless steel itself is non-magnetic, and there are various reasons for its magnetic properties
One is that in the smelting process, due to the influence of environmental elements and the solid solution temperature, a part of martensite elements will be mixed, resulting in weak magnetic properties, but the magnetic properties generated in this process are very small.
The second is that in the process of mechanical cold working, due to bending or deformation, as well as repeated stretching and flattening, a certain degree of magnetism will gradually be generated. As a result, it will be attracted by the magnet, which has caused the misunderstanding that 304 stainless steel has elements such as Fe that are magnetic.
Solution: Usually, most domestic manufacturers will go through a solid solution treatment before the finished product of cold processing, and use the annealing process to heat at high temperature, so as to achieve the purpose of eliminating metal stress. Therefore, it is not correct to judge 304 stainless steel only by magnetism.
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