High quality 34mm seamless 201 stainless steel round heat pipe Pickled stainless steel, the surface color is silvery white and smooth, chrome-nickel stainless steel is silver-white and jade-colored; chrome stainless steel is white, slightly grayish and weak; chrome-manganese-nitrogen stainless steel is similar in color to chrome-nickel stainless steel. light. The surface color of unpickled stainless steel: chrome-nickel steel is brownish-white, chrome-steel is brown-black, and chrome-manganese-nitrogen is black (these three colors refer to the color with heavier oxidation). Cold-rolled unannealed chrome-nickel stainless steel with silver-white reflective surface.
Identify with copper sulfate:
Remove the oxide layer on the surface of the High quality 34mm seamless 201 stainless steel round heat pipe, put a drop of water on it, and wipe it with copper sulfate. Magnetic ones are generally ordinary steel or low alloy steel.