Method for distinguishing ordinary steel and 304 stainless steel

Method for distinguishing ordinary steel and 304 stainless steel

1. Use a magnet to identify. Ordinary steel has strong magnetic properties, 304 stainless steel is non-magnetic or weakly magnetic (manufacturer saves cost, does not heat treatment after cold working, eliminates magnetism), when the same magnet is close to ordinary steel and 304 stainless steel, it can clearly feel the two Attractive size gap.

2, the difference in color: after pickling stainless steel, the surface color is silver and white: chrome-nickel stainless steel color silver-white color; chrome stainless steel color white slightly gray gloss weak; chrome-manganese-nitrogen stainless steel color similar to chrome-nickel stainless steel slightly lighter. Surface color of stainless steel without pickling: chrome-nickel steel is brownish white; chrome steel is brownish black; chrome-manganese nitrogen is black (these three colors refer to the heavier oxidized color). Cold-rolled, unannealed chrome-nickel stainless steel with reflective white surface. In addition to Yuan Steel, stainless steel is generally pickled and white.


Post time: Oct-17-2018
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