Stainless Steel Discoloration Temperature

The surface discoloration on stainless steel after grinding or welding is surface oxidation.

Stainless steel discoloration temperature. For any formulation of stainless steel alloy there is always some combination of temperature chemicals mechanical force and other stress factors that could compromise the appearance of the steel. Temperature tolerances for grade 316 stainless steel. The temperature tolerance of grade 316 stainless steel is close to that of grade 304 being just a. However stainless steel can become streaked with unsightly heat stains.

Cooking utensils made from stainless steel are also popular because they are low maintenance. Heat tint temper colours on stainless steel surfaces 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 color combination depends largely on the amount of heat used during welding darker colors brown blue and purple are usually formed at higher temperatures 370 c or 698 f. Temperature color of heated carbon steel o f o c 600.

Another popular alloy of stainless steel grade 316 ss is often used for applications that involve powerful corrosives as its corrosion resistance generally exceeds that of grade 304 ss. While stainless steel is famous for its resistance to oxidation and discoloration in most normal use cases it s important to note that no alloy is 100 impervious under all situations. 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 color of the stain is a function of the layer thickness.

Topic welding industry technical discussions stainless steel discoloration by apiguy date 06 19 2002 16 16 does anyone know where i can obtain a chart that would describe the heat tint discoloration of stainless steels. At elevated temperature the metal comprising the stainless steel will combine with oxygen to form an oxide layer on the metal surface. With a few simple household products it is easy to clean stainless steel that is discolored from heat. Cold chisels center punches.

The stainless steel then is rapidly cooled through the temperature range of 1 600 and 800 degrees f or 870 and 425 degrees c to inhibit carbide precipitation and then at lower temperatures exposed to air where the protective oxide film forms spontaneously. Heat tint temper colours on stainless steel surfaces heated in air introduction.