Stainless Steel Pipe Fittings

What is the influence of the surface roughness of the stainless steel plate

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It is well known that the surface quality roughness of the stainless steel plate will affect the effect of the finished product, so what are the effects of the roughness?

Stainless steel plate surface has a layer of dense oxide film can prevent oxidation of stainless steel material erosion surface, which could effectively avoid oxidation, whereas a more porous oxide film is constantly upset oxidation. In continuous production line, the surface of stainless steel is forced oxidation through continuous pickling method, thus increasing the toughness of the surface oxidation film of stainless steel. In addition, the effect of high temperature oxidation resistance, thickness of oxide film and chemical composition of oxide film should be tested. The results showed that the composition of oxide film and the oxide film thickness were not significantly affected by the adjustment of acid concentration. In the higher temperature environment, the application will be oxidized and discolored.

Under the environment of high temperature stainless steel plate surface oxidation surface oxidation film thickness of the board, this kind of phenomenon also and oxidation resistance of stainless steel plate itself and material heat capacity is directly related to stainless steel plate surface roughness and surface of the chromaticity of heat absorption capacity per unit area and cause stainless steel plate color degree.

Relevant data shows that when the surface roughness of the surface of the stainless steel plate drops to 0.022 mu m, the absorption capacity of the stainless steel plate will decrease significantly, and the stainless steel plate will not be further oxidized. When the oxide film thickness of stainless steel plate is basically maintain the original thickness, the degree of discoloration is slight. Conversely, if the thickness of the oxide film is significantly increased, the color will become more severe.

The carbon content of stainless steel plate materials is low, and the carbon atoms in the high temperature environment can easily spread to the stainless steel matrix during the oxidation process, so the oxidation process of stainless steel is accompanied by the carburizing process.

In order to verify the effect of silicon on carburizing, only the silicon elements were adjusted in 310S stainless steel, and then the high temperature cycling test was conducted. The test results show that the high temperature oxidation performance of the stainless steel materials can be enhanced significantly when the quality score of the chromium element increases to above 22% or the quality fraction of the silicon element is above 2%.

Source: China Stainless Steel Plate Manufacturer – Yaang pipe fitting Industry Co., Limited (

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