Why is stainless steel elbow with magnetic?

In real life, most people think that stainless steel is not magnetic and uses magnets to identify stainless steel.This point of view and testing is not rigorous and unscientific.

Let's first learn a concept: According to the research of material physics, the magnetism of the metal comes from the structure of electronic spin. The electronic spin is a quantum mechanical performance, which can be both upward or down. " In simple terms, the structure of the internal electrons of the metal determines whether it is magnetic. In addition, internal electrons of metal can be transformed by external conditions.

The definition of "stainless steel without magnetic" is that the magnetic indicator of stainless steel is lower than a certain value. Therefore, stainless steel is generally more or less magnetic.

At room temperature, there are many types of stainless steel. According to the organizational structure, it can be divided into:

This is because: After the 304 stainless steel is made of the elbow, the tissue structure will also be transformed into martenital stencilities. The larger the cold processing deformation, the more martensite transformation, and the stronger the magnetism will be.

Zhejiang Mingli's stainless steel pipe parts are formed by cold processing and deformation, and there is a weak magnetism after processing.After high-temperature solution treatment, the weak magnetic properties of most parts are basically eliminated.However, some pipe parts may still have weak magnetism, which can be reflected when adsorbing with magnets, which is normal.