Do you know how to identify 304 stainless steel screws? Today Stud Manufacturer ( https://www.chinaweigao.com/product/stud/ ) will explain to you how to identify 304 stainless steel screws.

1. The difference in color:
The pickled stainless steel has a silvery white and smooth surface color: the color of chrome-nickel stainless steel is silvery white and jade; the color of chrome stainless steel is slightly gray and weak; the color of chrome-manganese-nitrogen stainless steel is similar to that of chrome-nickel stainless steel. The surface color of stainless steel that has not been pickled: chrome-nickel steel is brown-white; chrome steel is brown-black; chromium-manganese-nitrogen is black (the three colors refer to the color with heavier oxidation). Cold-rolled, unannealed chromium-nickel stainless steel, with silver-white reflective surface. Except for stainless steel, stainless steel is generally white after pickling.
2. Use magnet to identify:
Ordinary steel is very magnetic, 304 stainless steel is non-magnetic or weakly magnetic (the manufacturer does not perform corresponding heat treatment after cold working to eliminate magnetism to save costs). When the same magnet is close to ordinary steel and 304 stainless steel, you can clearly feel both Attractiveness difference.
3. Special steel inspection potion:
Fasteners Suppliers ( https://www.chinaweigao.com/ )' potions are available in general hardware stores, so you don’t have to worry about the supply. 304 stainless steel material, it will not change color within 3-5 after the test of the potion, 201 stainless steel material, the potion will instantly turn dark brown red.