Customers often think that magnetic stainless steel is adsorption, to verify its advantages and disadvantages and authenticity, no magnetic absorption, that is good real;Suction magnetic, it is considered to be a fake. Actually, this is a kind of extremely one-sided, insubstantial error identifies a method. There are many types of stainless steel, according to the structure of the organization can be divided into several categories:
1. austenitic body: such as 304, 201, 316, 301;
2. Martensite or ferrite body type: 430,420,410, etc.;
Austenite bodies are nonmagnetic or weakly magnetic, martensite or ferrite bodies are magnetic. The stainless steel that uses adornment tube board commonly is the 304 steel belt of austenitic build mostly, will tell commonly be to do not have magnetism or weak magnetism, but because smelting causes chemical composition fluctuation or processing state to differ, also may appear magnetism, but this cannot think is false brand or unqualified, what reason is this? As mentioned above, austenite is non-magnetic or weakly magnetic, while martensite or ferrite is magnetic. Due to improper composition segregation or heat treatment during smelting, a small amount of martensite or ferrite structure in 304 stainless steel can be caused.
In this way. the 304 stainless steel belt will have a weak magnetic. In addition, 304 stainless steel after cold processing, the structure will also martensite transformation, the larger the deformation degree of cold processing, the more martensite transformation, the greater the magnetic steel. As a number of steel strip, the production of Φ76 tube, no obvious magnetic induction, Φ9.5 tube production. Because ling bending deformation larger magnetic sense is obvious, because the production of square rectangular tube deformation is larger than the circular tube, especially the bending part, deformation is more intense magnetic more
obvious. In order to completely eliminate the magnetism of 304 steel caused by the above reasons, it can restore the stable austenite structure by high temperature solid solution treatment, so as to eliminate the magnetism. 304 stainless steel belt magnetic is mainly in rolling, rolling and stainless steel belt friction produced by magnetic.