316l stainless steel tube to identify true and false

316 stainless steel tube is a hollow long circular steel, mainly used in petroleum, chemical, medical, food, light industry, mechanical instruments and other industrial pipelines and mechanical structural components. In addition, the bending, torsion strength of the same, the lighter weight, it is also widely used in the manufacture of mechanical parts and engineering structure. Also used for the production of conventional weapons, barrels, shells and so on.

International corrosion resistance of the material corrosion rate is divided into three categories, the first category for the complete corrosion resistance, the corrosion rate of less than 0.1mm / year, high-quality stainless steel belongs to such materials; the second category is still corrosion, Corrosion rate of 0.1-1.0mm / year, are generally stainless steel; the third category is not corrosion, the corrosion rate of more than 1.0mm per year. The discovery of counterfeit stainless steel products by analysis, corrosion rate of up to 9.67mm / year, is a serious non-corrosion.

In the further analysis of the product composition, found that the product represents an important indicator of stainless steel chromium content of only 10.03% and 7.1%, much lower than the minimum demand for chromium stainless steel 10.5% of the requirements. In general, iron-based alloys with a chromium content greater than 10.5% are called stainless steel, and the chromium content of these two products is much lower than this lower limit, and the product is simply not stainless steel.

The reason why the market will appear the product, mainly producers interested in smokers, the use of ordinary people to understand the shortcomings of stainless steel fraud. It is generally believed that stainless steel without magnetic, counterfeiters through a large number of ways to use manganese to change the product composition, has been a no magnetic, cost and extremely low material, so as to achieve the purpose of seeking high profits.

The appearance of the product in the market circulation and stainless steel is difficult to distinguish between the usual, because there is no magnetic, coupled with illegal dealers to take doping mixed with the trick, to the consumer to identify the authenticity of a great degree of difficulty, Will cause unpredictable consequences. In addition, this material uses a small amount of nickel, but can not play the role of nickel should be a waste of precious metals behavior, resulting in a certain waste of resources.

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