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Fast Identification of 304 and 316 Stainless Steel
2020 05 21

Fast Identification of 304 and 316 Stainless Steel

As we all know, 304 and 316 stainless steel are widely used steel grades, because the average nickel cotent of 316 stainless steel is higher than that of 304 stainless steel, in addition, it has better acid and alkali resistance and high temperature resistance after adding the Mo element. So, 316 stainless steel is used in the food industry and medical equipment industry.

Here are some methods to teach everybody how to identificate 304 and 316 Stainless Steel.

Observe Spark

The operator grinds the steel on the grinder, The spark of 304 stainless steel is straight line, there are rarely sparks of stainless steel 316, the spark is very short.

This method mainly is based on operators experience, it can be used as a preliminary judgment.

Chemical Method

The chemical analysis method also known as classical analysis, because various elements and their compounds have unique chemical properties. Thus it is possible to use chemical reactions for the qualitative or quantitative analysis of metallic materials. Chemical analysis can be divided into weight analysis, titration analysis and gas volume method according to the method of betermination. Differnent chemical analysis method are required for different elements. The results of chemical analysis are accurate, and it is possible to get results that are consistent with theory. But chemical analysis methods require professional analysts, and analysis results usually take a long time.

A Quick and Easy Test Method

Optical Emission Spectrometer Detection Method

Optical Emission Spectrometer detection is the emission of spectral lines with their own characteristics by the atoms of different elements when they are in an excited state. According to the different spectral lines it is possible to determine which element is which, and by the strength of the spectral lines the content of the element can be obtained.

According to the different spectral lines it is possible to determine which element is which, and by the strength of the spectral lines the content of the element can be obtained, in fact, all we need is a professional spectrometer, the operator puts different samples on the spectrometer, and then sparks, after 20s, the results are displayed on the computer screen at a glance.

Optical Emission Spectrometer indentifies 304 and 316 Stainless Steel

316 stainless steel is the most widely used stainless steel after 304 stainless steel, 316 stainless steel has the remarkable feature of being virtually free of thermal expransion and contraction, which is particularyly important for precision instruments.

 


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