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Why is the stainless steel cup with magnetic
Oct 17, 2017

Stainless steel varieties of complex, according to the layout of the layout at room temperature can be divided into several categories:

1. Austenitic type: such as 304,321,316,310 and so on. In the meantime, 304 stainless steel is mostly used in the production of stainless steel insulation cup, this stainless steel is not magnetic or magnetic very weak.

2. Martensite or ferrite type: such as 430,420,410, etc., this material is magnetic.

Usually used for decoration tube plate, vacuum insulation containers of stainless steel mostly austenitic type of 304 raw materials, such as 304 stainless steel vacuum insulation cup, usually the raw material of the cup is non-magnetic or weak magnetic, but the formation of chemical Component shaking or processing conditions are not the same can also show magnetic. So it can not be thought to buy the cup that is counterfeit or unqualified, what is the reason?

Above that austenite is non-magnetic or weak magnetic, and martensite or ferrite is magnetic, because the composition of the segregation or heat treatment improper handling, will form austenitic 304 stainless steel in a few martensite or Ferrite arrangement. This 304 stainless steel insulation cup appearance will be with a small magnetic.

In addition, 304 stainless steel through cold processing, arrange the layout will also be transformed into martensite, cold forming the greater the degree of deformation, the greater the transformation of martensite, steel, the greater the magnetic. Due to Ling bending deformation of the larger magnetic sense is significant, more violent deformation more significant magnetic.

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