Changzhou YingYuan call you identify stainless steel pipe
The following simple identification method of stainless steel pipe:
A, copper sulfate test
Copper sulfate test is the most convenient method for fast to distinguish between ordinary carbon steel and all kinds of stainless steel pipe. The use of copper sulfate solution concentration is 5~10%.
Two, nitrate test
A remarkable characteristic of stainless steel is corrosion resistance has the inherent in concentrated nitric acid and dilute nitric acid. This performance so that it can be easily separated from the central to most other metals or alloys. But the high carbon 420 and 440 steel in nitrate test is slightly affected by corrosion, will be immediately when encountered concentrated nitric acid corrosion of nonferrous metals. And dilute nitric acid is highly corrosive to carbon steel.
Three, magnetic test
Magnetic testing method is the most simple distinction annealing of austenitic stainless steel and ferritic stainless steel. Austenitic stainless steel is non-magnetic steel, but the pressure of cold processing will have mild magnetic; pure chrome steel and low alloy steel is strong magnetic steel. Through the magnetic test tube can identify austenitic stainless steel and ferritic stainless steel tube.
(editor
：admin)
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