I have several kinds of stainless steel, and I want to go to a large testing institution to determine their metal content. 300 yuan, each kind is too expensive. Is there a cheap place? I am in Shanghai. ... Stainless steel is usually divided into martensite steel, ferrite steel, austenite steel, austenite-ferrite (duplex) stainless steel and precipitation hardening stainless steel. In addition, it can also be divided into chromium stainless steel, chromium nickel stainless steel and chromium manganese nitrogen stainless steel.

Generally, the brand of stainless steel should be determined, and at least the contents of C, Cr, Ni, Mn and Ti should be determined. 300 yuan is not expensive. Is it accurate to measure in a cheap place? This is a problem.

Besides, what is the purpose of your measurement? If you just want to know the contents of Cr and Ni, you can only measure the elements you need to know, and the price should be cheaper.