Why is stainless steel spring magnetic?

　　It is often thought that the magnet adsorbs the stainless steel material to verify its high quality and authenticity, not to absorb the non-magnetic material, and that it is good, or the real price is real. If the magnet has magnetism, it is considered to be a fake. To this end, wall spring pointed out: in fact, this is a one-sided, unrealistic and wrong way to judge.

　　There are many kinds of stainless steel springs, which can be divided into several types according to the organizational structure at room temperature:

　　1. Austenite type: 304, 316, 321, 310

　　2. Martensitic or adherent type: 430, 420, 410

　　The austenite type is nonmagnetic or weakly magnetic. Generally, the stainless steel used for decorative tubesheet is made of 304 austenitic type material, which is generally non-magnetic or weak magnetic. However, due to intellectual practice, chemical composition fluctuation or different processing state may also appear magnetic, but this cannot be considered as fake or unqualified.