304 Stainless Steel Opener Is Not Magnetic, Is This Correct?

Many buyers think that the 304 stainless steel opener is not magnetic, is this correct?

 

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Stainless steel bottle opener ring


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stainless steel speed bottle opener

304 stainless steel is an austenitic stainless steel. It is non-magnetic or weakly magnetic. However, magnetic properties may occur due to fluctuations in chemical composition or processing conditions due to smelting, but this cannot be considered as a counterfeit or a failure. What is the reason?

 

A small amount of martensite or ferrite structure in austenitic 304 stainless steel is caused by segregation or improper heat treatment during smelting. Thus, 304 stainless steel will have weak magnetic properties.

 

In addition, 304 stainless steel is cold-worked, and the microstructure is also transformed into martensite. The greater the cold work deformation, the more martensite transformation and the greater the magnetic properties of the steel. Like a batch of steel strips, it produces Φ76 tubes with no obvious magnetic induction and produces Φ9.5 tubes. Due to the large deformation of the bending, the magnetic induction is obvious. The rectangular tube produced is larger than the round tube, especially the angled part, and the deformation is more intense and the magnetic is more obvious.

 

In order to completely eliminate the magnetic properties of the 304 steel caused by the above reasons, the austenite structure can be restored by high-temperature solution treatment to eliminate the magnetic properties.

 

In particular, the magnetic properties of 304 stainless steel caused by the above reasons are not at the same level as the magnetic properties of other materials such as 430 and carbon steel. That is to say, the magnetic properties of 304 steel always show weak magnetic properties.

 

This tells us that the 304 stainless steel opener is likely to be weakly magnetic.