How to identify the quality of stainless steel elbow fittings?

You said stainless steel is magnetic, right! No magnetism, that makes sense! In fact, is essentially different, we all know that stainless steel and austenitic stainless steel and ferritic stainless steel.

Among them, austenitic stainless steel is non-magnetic, while ferritic stainless steel is a strong magnetic steel body, through a series of experiments proved that austenitic stainless steel in some special conditions will have no obvious magnetic generation, but under normal circumstances is not magnetic.

Two, nitric acid point test

Most of the time the 200 series, 300 series, 400 series and other types of stainless steel is difficult to distinguish with the naked eye, by nitric acid point test to test the corrosion resistance of the substrate is the most intuitive testing methods, usually 400 series will only when tested by slight corrosion, and corrosion resistance of the lowest 200 series stainless steel, there will be obvious corrosion marks.

Three, through machining testing

If the stainless steel test is shaft type, it is recommended to get the ordinary lathe or CNC lathe for machining detection, but there are still some limitations, the method is only suitable for easy cutting steel and standard stainless steel, such as 303, 416, 420F, 430F, 440F, through the shape of car chip to identify the type of steel, This kind of chipped steel will give off an unpleasant smell when it is turned in dry condition.

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