Stainless steel as a steel material, the content of the study is also the relationship between the (chemical) composition of steel - structure (structure) - (various) performance, in fact, this is not only involved in heat treatment, but also involved in a variety of processing, at the same time stainless steel purity, uniformity, surface state and so on also has an important impact. For the sake of understanding, the following picture is for examination and study.

It can be seen from the diagram that to study and understand stainless steel, in fact, it is necessary to understand the relationship between stainless steel composition - organization - performance, and also to understand the relationship between heat treatment - organization - performance and processing - organization - performance, as well as the influence of the purity, uniformity and surface state of steel.

From the diagram, the following conclusions can be drawn.

1 stainless steel corrosion resistance is mainly determined by the chemical composition of steel (currently popular in the society only with no magnetic steel to determine the merits of stainless steel corrosion resistance is not scientific. Because the magnetic stainless steel is determined by the structure of the steel.

2. Under the influence of some conditions (such as thermal history), the interaction between chemical components in steel not only determines the type of matrix structure of the steel, but also determines the composition of various phases and compounds of the steel (in fact, non-metallic inclusions in steel are also the products of chemical element interaction in steel).

3. The mechanical and physical properties of stainless steel are mainly determined by the structure of the steel.

4. The chemical composition of stainless steel can also directly affect the mechanical properties of steel, such as the solid solution strengthening of alloying elements. The structure of stainless steel can also directly affect the corrosion resistance of steel, such as carbon, oxides and intermetallic compounds precipitation.

5. Under some conditions, stainless steel corrosion resistance and mechanics and other properties can also affect each other.

6. In addition to the chemical composition and organizational structure of stainless steel, stainless steel purity, uniformity, surface state and so on the performance of stainless steel also has an important impact. (From Introduction to Stainless Steel)