How to identify 201 and 304 stainless steel wire mesh materials

The appearance of stainless steel wire mesh made of 201 and 304 is almost the same. They are all silver-white. So what method can we use to identify the material of stainless steel wire mesh?

Generally speaking, the most direct way to distinguish the stainless steel wire mesh of 201 and 304 materials is through special medicine. We only need to drop the medicine on the stainless steel wire mesh for about 1 minute. If the place where the medicine drops appears red, it means that the stainless steel wire mesh of 201 materials is stainless steel wire mesh of 304 materials. If it does not change color, it means that it is stainless steel wire mesh of 304 materials. Rust wire mesh.

If there is no way to buy a special test solution, we can send the stainless steel wire mesh to the local quality and Technical Supervision Bureau for testing.