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.

Heat Temper Colours on Stainless Steel Surfaces Heated in Air By yaang.com

The colour formed when stainless steel is heated, either in a furnace application or in the heat affected zone of welds, is dependent on several factors that are related to the oxidation resistance of the steel. The heat tint or temper colour formed is caused by the progressive thickening of the surface oxide layer and so, as temperature is increased, the colours change. Oxidation resistance of stainless steel.