A small number of stainless steels commonly used for construction are austenitic 304 materials. Generally speaking, they are non-magnetic or weakly magnetic. However, they can also exhibit magnetic properties due to chemical fluctuations due to smelting or differences in processing forms. However, this cannot be considered. Counterfeit or failing, what is the reason for this?

It is mentioned below that the austenitic stainless steel U-bolt gasket is non-magnetic or weakly magnetic, while martensite or ferrite is magnetic. Due to segregation during smelting or improper heat treatment, austenitic 304 stainless steel will be formed. A large number of martensite or ferrite structures. In this way, 304 stainless steel will have weak magnetic properties. In addition, when 304 stainless steel is cold-worked, the structure and structure will also be transformed into martensite. The greater the degree of cold-working deformation, the greater the transformation of martensite and the greater the magnetic properties of the steel. In order to completely eliminate the magnetic properties of 304 steel formed by the above-mentioned reasons, the low-temperature solid solution treatment can be used to restore the bumped austenite structure to eliminate the magnetic properties.

It is particularly important to mention that the magnetic properties of 304 stainless steel formed by the following reasons are not at the same level as other materials of stainless steel, such as 430 and carbon steel. In addition, the magnetic properties of 304 steel have always been weak magnetic. This informs us that if the stainless steel connecting claw is weakly magnetic or non-magnetic at all, it should be identified as 304 or 316; if it is the same as carbon steel and exhibits strong magnetism, it should be identified as not 304.