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Some knacks of judging whether the material of vibration screen is 304 or 201

Now I will introduce some knacks of judging whether the material of vibration screen is 304 or 201.

The 201 stainless steel is just a little better than the common steel with small difference. It has little anti-rust component with the worst quality in the stainless steel. If used in the vibration screen, it will basically be rusty in a short time.

The 304 stainless steel is the common stainless steel, which is the frequently-used type of vibration screen. It is much better than the 201 stainless steel. The 304 stainless steel is the type of steel plate which is the material contacting part we said to the clients usually.

The easiest distinguishing method is using the magnet. If the magnet has hairlike adsorption force to the vibration screen surface, it is 201 material. If doesn't basically, it is 304material.

Another way is using chemical. It is that first remove the oxide layer on the stainless steel and then put a drop of water. And finally wipe it with the cupric sulfate. If it doesn’t discolor after wiping, it is stainless steel generally. If it turns red without magnetism, it is high-manganese steel. If it turns red with magnetism, it is common steel or low-alloy steel generally. But this method is not ideal for clients.
There is still a way to distinguish. It is observing the brightness of vibration screen surface. Looking at carefully the screening machine surface with 201 stainless steel material after polishing, you will find some dark spots and pitting. And the screening machine surface with 304 stainless steel material is smooth and clean after polishing, without these questions.