304 is a kind of stainless steel plate with universal main purpose. It is generally used to produce mechanical equipment and components with excellent comprehensive performance (corrosion resistance and formability).

It exhibits obvious cold work hardening during deformation and is used in a variety of places. In essence, 302 stainless steel plate is a combination of 304 stainless steel plate, with higher carbon content, and higher compressive strength can be obtained by cold rolling. Spring manufacturer

302B is a high-silicon stainless steel plate with high resistance to air oxidation. 303 and 303SE are free-cutting stainless steel plates each with sulfur and selenium. They are mainly used in places that require random laser cutting and high gloss.

Under such standards, because 303Se stainless steel plate has excellent heat treatment characteristics, it is also used to produce parts that require hot upsetting.

30L is a variation of 304 stainless steel spring with low carbon content. Used in electric welding welding place. The lower carbon content of the mold spring sleeve makes the total amount of cementite dissolved in the heat damage zone around the welding. The dissolution of cementite may cause stress corrosion (welding corrosion) of the stainless steel spring in some natural environments.

For stainless steel springs, the shrinkage exceeds the value. Soon after the application is applied, it does not shrink, or even has no ductility. Everyone has encountered it in daily life. This is because the shrinkage of the application exceeds the value. Larger shrinkage, if the working pressure of bomb yellow cracking is too large, then it is not easy to produce cracks when the normal frequency is applied. If the application frequency of the bombshell is too much, the bombshell can not bear the scope of work pressure.

In other words, in the whole process of applying the spring yellow, the spring is deformed due to the left and right vibrations of the spring. If there is a pre-tightening force, the application of the mold spring size will be relatively stable. Stainless steel springs are generally not vertical, which will cause damage to the spring guide pin and spring, and even break the precision spring.