Is stainless steel non–magnetic?

  1. Usually we used 300 series material of austenitic stainless steel as decorative tube or plate. For the most part, they are non-magnetic or weakly magnetic. However, due to casting caused by chemical composition fluctuations or processing status, they may also appear to be magnetic.
  2. Since the composition of segregation or heat treatment is not sufficient, it will cause 300 series austenitic of stainless steel containing a little of martensite or ferrite organization. Therefore, 300 series of stainless steel will be weakly magnetic, but the heat treatment mentioned above is to meet the requirements of mechanical properties.
  3. In addition, after cold working on 300 series of stainless steel , the organization will be converted into the martensite. The greater deformation of cold working, the more organizational conversion of martensite and the greater the magnetic properties of stainless steel.
  4. To eliminate the above-mentioned causes of the magnet of 300 series of stainless steel, we can use the high temperature solid solution annealing to stabilize the austenitic organization.

The prediction for δ-ferrite content in welding line

  1. We will bring alloy elements of austenitic stainless steel into the formula which is the chromium equivalent and nickel equivalent correction proposed by Shaeffler Diagram to do the forecast of δ-ferrite content.