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Stainless steel is magnetic with and without

 

Some careful friends will find that the stainless steel commonly used to decorate the tube is actually magnetic. This is what the reason is, for this problem below the introduction of 2205 stainless steel plate, why some austenitic stainless steel has magnetic some.
Austenitic stainless steel is non-magnetic or weak magnetic, and martensite or ferrite is magnetic, due to the smelting composition segregation or improper heat treatment, will cause a small amount of martensite or ferrite structure in austenitic 304 stainless steel. In this way, decorative tube board will have a weak magnetic.

In addition, 304 stainless steel after cold processing, the structure will also martensite transformation, cold processing deformation degree, the more martensite transformation, the greater the magnetic steel. As a number of steel strip, the production of Φ 76 tube, no obvious magnetic induction, Φ 9.5 tube production. It is obvious that the deformation of flapping tube is larger than that of round tube.

In order to completely eliminate the magnetism caused by the above reasons, the stable austenite structure can be recovered by high temperature solid solution treatment so as to eliminate the magnetism.

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