Methods for Stainless Steel Grade Sorting By yaang.com

The conclusive methods for determining the grade of a sample of metal, believed to be a stainless steel is by a chemicalanalysis method. Normally spectrographic methods are used. These quantitative methods, provided they are properly calibrated using samples of known composition, give accurate figures for the important elements (chromium, nickel, molybdenum) in the sample.

Chromium Effect for Stainless Steel Properties By yaang.com

Chromium on the corrosion resistance of stainless steel decisive role in the definition of stainless steel, ω (Cr) ≥ 10.5%, which is the main element of stainless steel, corrosion resistance, the higher the chromium, corrosion resistance higher possible. This is because the steel in the oxidation of the medium can be formed to Cr2O3 as a stable substrate surface protection film (about 10μm), that generate passive phenomenon, in which enrichment of the chromium layer membrane.

High Temperature Change Stainless Steel Mechnical Properties By yaang.com

The carbon steel and the stainless steel both suffer a reduction in the values of their mechanical proprieties while working in high temperatures.

As a matter of fact, this is an attribute of metals and metallic alloys in general. In common steel, the loss in mechanical proprieties is more expressive than in the austenitic stainless steel, explaining the selection preference of these materials forhigh temperature applications.

The equipments projects must consider this aspect, and that should not be forgotten while doing the material specification. However, in high temperature, the anti-corrosion resistance is usual the most important factor in the material selection. In high temperatures, the stainless steel is superior to the carbon steel, as for the anti-corrosion resistance and the mechanical proprieties.

Source: Zhejiang Yaang Pipe Industry Co., Limited (www.yaang.com)