304 stainless steel is magnetic. Why is 304 stainless steel also magnetic?

What determines the magnetism of stainless steel?

In many people's eyes, stainless steel does not contain magnetism, while Stainless iron does not contain magnetism. It is wrong to know so, stainless steel is also magnetic in many categories due to the reason of raw materials 304 for example, 304 with magnetism is also one of the varieties that many people think are not authentic stainless steel, because 304 stainless steel is more useful, then why 304 is magnetic? This question is from the perspective of physical structure. Doubt 304 was originally without magnetism, for example, stainless steel plate and so on. But why are some finished product belts made in stainless steel?

The reason is very simple, that is, the internal structure changes due to deformation. 304 some change from martensite to ferrite. The bigger the deformation, the bigger the change. Therefore, some stainless steel products have smaller magnetism after being manufactured, so is there a way to deal with magnetism?

There is also demagnetization treatment. After wire drawing, demagnetization treatment will be conducted in the future. After demagnetization treatment, the magnetism can drop, but it is impossible to reach the completely non-magnetism. Only the degree drops greatly, so every customer feels that it is not stainless steel when they buy stainless steel at the top of the list. Now there are two ways to judge whether stainless steel is authentic. Stainless steel potion at the top of the list, this is relatively simple. Usually, it is authentic to turn red on the spot of 304 liquid drops. The other thing is to check the spectrum to know the composition and distinguish it from the composition, chemical composition of stainless steel the corrosion resistance of stainless steel decreases with the increase of carbon content. Therefore, the carbon content of most stainless steel is relatively low, and the maximum value is no more than 1.2%. Wc (carbon content) of some steel even lower than 0.03% (such as 00 Cr12). The main alloy element in stainless steel is Cr (chromium). Only when the Cr content reaches a certain value can Steel have corrosion resistance. Therefore, generally, the Cr (chromium) content of stainless steel is at least 10.5%. Stainless steel also contains Ni, Ti, Mn, N, Nb, Mo, Si, Cu and other elements. The corrosion resistance of stainless steel decreases with the increase of carbon content. Therefore, the carbon content of most stainless steel is relatively low, the maximum is no more than 1.2%, and the Wc (carbon content) of some steel is even lower than 0.03% (such as 00 Cr12). The main alloy element in stainless steel is Cr (chromium). Only when the Cr content reaches a certain value can Steel have corrosion resistance. Therefore, generally, the Cr (chromium) content of stainless steel is at least 10.5%. Stainless steel also contains Ni, Ti, Mn, N, Nb, Mo, Si, Cu and other elements.)

therefore, it is impossible to distinguish whether the stainless steel material is good or bad by magnetic or not. Some products will produce Micromagnetism after being manufactured. The well-known!