anyone got a color chart for stainless steel welds ?

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i need a chart showing the colors and temp of stainless after it is welded anyone have a link please ?
Reply:Colour Formed Approx Temperature C pale yellow 290 straw yellow 340 dark yellow 370 brown 390 purple brown 420 dark purple 450 blue 540 dark blue 600Hope that's what you are looking for.Airco Ac/Dc 300 HeliwelderMillerMatic 200 (stolen)Miller Maxstar 150STLMiller AEAD200LE (welding and generating power) Hobart MIG
Reply:Its not really the temp, its the oxygen content of the atmosphere touching the metal while its above about 4-600Experience is something you get right after you need it
Reply:Originally Posted by Fred sIts not really the temp, its the oxygen content of the atmosphere touching the metal while its above about 4-600
Reply:Should be in your text book, I think. I go by "anything but gray is ok"I always thought purple was on the hotter side than blue. I usually get blue at the beginning of the weld, then light yellow, then gold, and if I stick around too long the gold turns into a purpleish gold, then gray.
Reply:Hello Tyler, see my next post. The file sizes screwed up my attempts to attach them here.Last edited by aevald; 11-05-2013 at 08:56 PM.aevald
Reply:Hello Tyler, are you referring to purge levels possibly? Colors in stainless steel welding can certainly come from temperatures, yet, results from welding are relative to shielding and time at temperature as well. If you have a good shielding system you will end up with "silver" welds, as the lack of shielding comes into play the colors will show up as a result of exposure to atmospheric oxygen and the longer that the material is at a reactive temperature and the more oxygen that it is allowed to react to will promote the display of different colors. I'll try to include a chart of how some of this comes into play. Best regards, Allan . Attached Imagesaevald
Reply:thank you guys so much i just started stainless tonight at school so i dont really know what color of weld is ok this will help a lot .i know brown/gray wont fly at school so looking at the chart i will have to stop welding when my weld turns purple ?
Reply:Just buff it off, then it'll be silver.
Reply:Originally Posted by tylersloani know brown/gray wont fly at school so looking at the chart i will have to stop welding when my weld turns purple ?
Reply:Hello again Tyler, Doug gave you a very thorough explanation as to the reason for colors and their various levels. Consider that the GTAW process is unique to almost all of the other welding processes. It is one of the few that allows for such a wide combination of amps, volts, levels of addition of filler, and speed/progression. You "can" run very slowly with a lot of heat and varying amounts of filler addition, but if you weld in this manner you will likely see excessive indications of oxidation and in some cases a phenomenon referred to affectionately as "sugaring"(this usually occurs on the backside of your welds and is caused by full material thickness penetration, leading to unprotected molten weld metal). Simply stepping up your travel speed can drastically alter the appearances and conditions that apply to your resulting finished weld. Using backing/chill bars can affect the finished weld as the dissipation of heat will reduce oxidation conditions. Gas lenses, larger cup sizes, correct shielding gas flow rates will all have affects on finished weld colors along with travel speeds and heat input levels(amps). You've got plenty ahead of you to figure out the many nuances associated with this process and it's applications. Good luck, have fun, and regards, Allanaevald
Reply:ok now it makes sense thanks for the imput guys just for the record im running 60 to 65 amps on thin wall pipe with a number 10 alumiacup with a gas lens running 20 cfm of gas .im getting really good welds i just got to tighten up my walk ill post up pictures later tonight
Reply:Look forward to seeing those Tyler. Weld away! Regards, Allanaevald