304 stainless steel coils are divided into austenitic stainless steel cold-rolled coils and stainless steel hot-rolled coils. 304 stainless steel (coil) plate characteristics: beautiful surface, diversified use possibilities; good corrosion resistance; longer durability than ordinary steel; good corrosion resistance; high temperature oxidation resistance and high strength, so it can resist fire; good plasticity, welding performance it is good. It has excellent stainless corrosion resistance, good intergranular corrosion resistance and good processing performance.

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

1. Austenitic type: such as 304, 321, 316, 310, etc.;

2. Martensite or ferrite type: such as 430, 420, 410, etc.;

The austenitic type is non-magnetic or weakly magnetic, and the martensite or ferrite is magnetic.

Most of the stainless steel usually used for decorative tube sheets is austenitic 304 material, which is generally non-magnetic or weakly magnetic, but may also appear magnetic due to fluctuations in chemical composition or different processing conditions caused by smelting, but this cannot be considered as a Counterfeit or substandard.