Stainless Steel Heat Discoloration Chart

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.
Stainless steel heat discoloration chart. Stainless steels is usually less affected by weld heat tinting 2 this article will introduce for consideration color samples similar to those shown on the aws d18 2 chart performed on electropolished 316l stainless steel in an effort. The chart in this standard allows the user to match acceptable discoloration levels for weld heat affected zones on mechanically polished uns s31603 tubing perfectly to help assure optimum safety code compliance. Heat tint recognition chart for stainless steel welding pictures 1a to 1 g provided by norsok for the norsok standard m 601 welding and inspection of piping edition 5 april 2008 annex b. 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 surface discoloration on stainless steel after grinding or welding is surface oxidation. At elevated temperature the metal comprising the stainless steel will combine with oxygen to form an oxide layer on the. It is easy to care for and clean but occasionally an unsightly discoloration develops. Heat tints appearing after stainless steel welding are a common problem in the industry.
Heat tint colour chart the table below represents the temper colours that are likely to form on stainless steel type 1 4301 aisi 304 if heated in air. Learn what causes them and how to solve the problem successfully. I m new to the whole method of heat treating but i ve got a question that i hope some of you have the answers to. Over the past month we received a lot of questions related to discoloration and heat tints appearing on stainless steel welds after fabrication welding.
2a 2b 2c 2d 2e 2f 12 ppm 60 70. Stainless steel is a sturdy and reliable material commonly used in kitchen sinks appliances and cookware.