Advantages And Identification Methods Of 200 Stainless Steel Plate

①Spectrum: Using a high-voltage electric excitation spectrometer gun (the instrument is small in size and easy to carry) to perform a spectrum can qualitatively distinguish the element types of steel and the approximate content.
②Chemical reagents: There is a special reagent called nickel qualitative solution. Drop it on the surface of stainless steel and it will oxidize instantly after being powered on, turning into light white or light yellow, indicating that the stainless steel does not contain nickel; it will turn into light rose red and will immediately fade to dark color. If it is yellow, it means that the nickel content of the stainless steel is about 1%-2%; if it produces a rose red color and does not fade, it means that the stainless steel contains more than 4% of nickel. The brighter the rose red color, the higher the nickel content.
③Color: The surface color of pickled stainless steel: 300 series stainless steel is silvery white and jade-colored; 400 series stainless steel is white and slightly gray with weak luster; the color of 200 series stainless steel is similar to 300 series stainless steel, slightly lighter. The surface color of unpickled stainless steel: 300 series stainless steel is brown-white; 400 series stainless steel is brown-black; 200 series stainless steel is black.
④Sparks: To identify sparks, grind stainless steel on a grinder and observe the sparks. If the sparks are streamlined and have more dense knots, it is 200 series stainless steel with higher manganese content; if there are no knots, it is 300 or 400 series stainless steel.
The above methods are all simple and easy identification methods, but there are certain errors. Especially the ③ and ④ methods rely entirely on visual experience, and the error may be even greater. The most accurate method is of course the inspection report issued by a qualified inspection agency.