304 STAINLESS STEEL COIL

304 stainless steel coil is austenitic is non-magnetic or weakly magnetic steel coil. After cold working, the organizational structure will also be transformed into martensite. The greater the cold working deformation, the more martensite is transformed, and the greater the magnetism of the steel. Like a batch of steel strips, produce φ76 pipe with no obvious magnetic sensation and produce φ9.5 pipe. Due to the greater bending deformation, the magnetic sense is obvious, the deformation of the production of square rectangular tube is greater than the round tube, especially the bending part, the deformation is stronger, the magnetism is more obvious.

In order to completely eliminate the magnetism of 304 steel caused by the above reasons, the stable austenitic organization can be restored by high temperature solid solution treatment, thus eliminating the magnetism.

It is especially important to note that the magnetism of 304 stainless steel is completely different from that of other materials such as 430 and carbon steel, i.e. the magnetism of 304 steel always shows weak magnetism.

If the magnetism of the stainless steel strip is weak or completely non-magnetic, it should be judged as 304 or 316 material; if it is the same as the magnetism of carbon steel, it should be judged as not 304 material.