2017/10/06

ステンレスは磁気を帯びますか?

  1. Usually we used as decorative tube or plate 300 series of austenitic stainless steel of material, they have magnetic or faint magnetic, but due to casting caused by chemical composition fluctuations or processing status may also appear magnetic.
  2. Due to the composition of segregation or heat treatment is not sufficient, they will cause 300 series austenitic of stainless steel containing a little of martensite or ferrite organization. So that 300 series of stainless steel will be with a faint magnetic, but this heat treatment is to meet the requirements of mechanical properties.
  3. In addition, 300 series of stainless steel after cold working, the organizational will be converted into the martensite , they have the greater deformation of cold working, The more organizational conversion of martensite , the greater the magnetic properties of stainless steel.
  4. To eliminate the above-mentioned causes of the 300 series of stainless steel of magnetic, we can be used to the high temperature solid solution annealing to stabilize the austenitic organization.
 

The forecast welding content δ-ferrite

  1. We will austenitic stainless steel alloy elements bring in the formula, Shaeffler Diagram proposed chromium equivalent and nickel equivalent correction, to do the forecast welding content δ-ferrite.
 

304:
Ni:8~10.5%
Cr:17.5~19.5%

304L:
Ni:8~12%
Cr:17.5~19.5%

316L:
Ni:10~14%
Cr:16~18%