How to identify stainless steel?

Stainless steel can change the magnetic characteristics of stainless steel through demagnetization or magnetization process, and it is inaccurate to test with a magnet alone. Usually cheap stainless steel can be demagnetized to pretend to be high-quality stainless steel; at the same time, high-quality stainless steel sometimes needs to be magnetic to increase operability.

Copper sulfate identification method:
The method is to remove the oxide layer on the steel, put a drop of water, and wipe it with copper sulfate. or low alloy steel.

Reagent detection method:
This is a fast detection method, which uses several detection reagents to detect the content range of nickel, chromium and molybdenum in stainless steel.
The advantages are: convenient, fast and basically accurate.
The disadvantage is: there is a deviation in the operation, and the test results can only be used for rough judgment, not as a precise conclusion.

Of course, if you need to make accurate judgments on stainless steel products, you need to make accurate model judgments on stainless steel samples. The best way is to send the samples to a testing agency with corresponding qualifications for testing, in order to get an authoritative conclusion.