Usually austenitic 304 stainless steel material is generally non-magnetic or weak magnetic, but due to chemical composition fluctuations or different processing conditions caused by smelting, magnetism may also appear. Then if you want to completely eliminate the magnetism of 304 stainless steel plate, you can The austenite structure is restored and stabilized by high-temperature solution treatment, thereby eliminating magnetism.

The reason for the magnetism of 304 stainless steel plate: In real life, stainless steel is not without magnetism. For example, the most commonly used 304 stainless steel plate will also produce different degrees of magnetism after cold working; it is expressed in the professional terms of physics: 304 stainless steel plate generates magnetism from the structure of electron spin, which belongs to quantum mechanical properties. In addition, after 304 stainless steel plate is cold worked, the structure will also be transformed into martensite. The greater the cold working deformation, the more martensite transformation and the stronger the magnetic properties.

Summary: If the stainless steel is weakly magnetic or not at all magnetic, it can be judged as 304 material; if it shows strong magnetism like carbon steel, it is not 304 material; 304 is austenitic stainless steel, single-phase, no magnetic.