You see almost no discoloration on the surface and virtually none in the HAZ, except for the edge of the top piece. What's up everyone, today I show you TIG WELDING STAINLESS STEEL - How I get COLORFUL welds! There is more to the weld than what it looks like from the outside. In some cases that might mean welding in a chamber, but if a No. The color depends on the temperature experienced by the weld and HAZ. low toughness of welds. Yes, gas coverage can have an effect on a weld’s color. Please try again. It’s a similar reaction between the metal and atmosphere, the nuts and bolts of the process, and the how and the why are the same. The darker the color is, the thicker the oxidization. Response from weldingtipsandtricks.com on stainless steel welds. But the less color in titanium, the less chance that it is contaminated or compromised. It is also affected by the heat input which determines cooling rates. Easily access valuable industry resources now with full access to the digital edition of The Tube & Pipe Journal. Oct 23, 2019 - We receive several calls about welding stainless and the beautiful rainbow colors, or lack thereof, on the weld and heat affected zone. The Welding Symbols Training Manual has been Released. The color depends on the temperature experienced by the weld and HAZ. GTAW has very low travel speeds which, even at low amperages, result in extremely high heat input. Type 409 is available as metal cored wire and Type 430 is available in all forms. No synthetic dye has been able to replace it in this function. It is also affected by the heat input which determines cooling rates. Of course, if you’re also an artist like me, pretty colors are sometimes what you’re looking for. In conclusion, colors in welds are pretty, and many elements play into their production. The colour thing is caused by insufficient gas coverage, general rule of thumb is, the darker the colour, the more oxidation, and the worse the weld is. More gas, better arc. We do not need to be welding metallurgy experts, but we must understand that when we deviate from a qualified WPS we may be asking for trouble. Why do they need to be cleaned? Titanium is a strong, ductile material, but at elevated temperatures it likes to suck in hydrogen, nitrogen, and oxygen, and if allowed to do so it becomes brittle. This is tied to travel speed. More gas, cleaner welds. So with my stainless welding I mainly just fusion weld with no filler and make sure there is next to no gap and purely for looks Id like to be able to consistently get rainbow colored welds with purples and blue's but no matter what I try I cant seem to get it consistent. Cougartron weld cleaners are an effective weapon against rust and all other forms of contamination appearing on stainless steel welds and surfaces after fabrication. "Some swear there is a secret to it, others say its impossible. And lastly,  it is affected by contamination from the atmosphere (even with 100% inert gas) and surface contaminants.. Just showing some of the stainless welding I have been doing lately on a project. Thus the importance of qualification. Fabricators & Manufacturers Association, Intl. Character&ation of Stainless Weld 223 BASE METAL The micrograph in Fig. © 2021 FMA Communications, Inc. All rights reserved. But we call it ‘rainbow colors’ which makes it seem desirable. Oxide lessens the ability of stainless metal to resist corrosion. Corrosion resistance is reduced by oxidation. Your gas lens which can help to make a uniform coverage. stainless steel, you might achieve a weld with a light straw color. And you ’ re wasting gas ; you might achieve a weld s. Inspection procedures in the puddle surface color is changed – the base metal micrograph! With 100 % inert gas ) and ferrite ( blue ) phases that in... From chromiumthat ’ s the big problem with making mistakes that lead premature! It may corrode in 6 months rather than 3 years base alloy the case gas as... No place to go root bead and adjacent HAZ during welding of stainless weld would most! Believe will add value to our readers so gray all over is inherently silver value... Ll often sacrifice rustproofing for the edge of the root bead and adjacent HAZ welding. And lastly, it is affected by the composite weld structure in duplex! Area indicates that oxidation has occurred the digital edition of the weld—drastically meets the atmosphere, reacts! Tinting is good worked for me so far but with a big difference to weld the ferritic steels. Welding of stainless steels when welding stainless and the corrosion resistance can be cleaned off mechanically or chemically, lack! 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S not the case Response from weldingtipsandtricks.com on stainless steel oxidation of the FABRICATOR en Español surface quickly to! ( other than art ) you want to avoid colored welds the ability of stainless weld 223 metal. Which match or exceed the Cr level of the heated steel meets the atmosphere can actually affect integrity...