Tig Welding Stainless Steel Pipe Amperage

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Tig welding stainless steel pipe amperage.

For stainless steel welding you should purge to an oxygen level of 0 1 1 000 parts per million. Stainless is less thermally conductive than mild steel so heat does not flow away from the weld quite so quickly. By andy boonville i m trying to learn how to tig weld sanitary stainless pipes usually 1 5 to 2 diameter at the brewery where i work. Carbon steel stainless steel and aluminum can all be welded using pure argon shielding gas.

Use argon as shielding gas. How to purge with ar. Learn more about welding product technologies and solutions and which products feature them. Below is a quick guide for selecting the right items for your tig welding.

Shielding gas 90 of applications can be done with 100 argon. The amps required to weld stainless are about 10 lower than the amps used for mild steel. However this does not mean that you should turn down your amperage. This will require traveling much slower and therefore produce more heat input on an overall scale.

When welding stainless steel use dcen polarity and 2 thoriated tungsten. The more heat you put into stainless steel tig welding the worse your weld will look and the more your project will warp. In our fab shop we have the luxury of using a o2 sniffer that we use in confined space entry cases. Purging is normally carried out with argon gas as it is totally inert and as it is readily available in the welding environment.

Beginners might find the stainless chart handy for mild steel the lower amps will compensate for a slower travel speed. For example you can use 90 he 7 5 ar and 2 5 co2. Sanitary stainless pipe welds. Lincoln electric how to gtaw tig weld stainless steel.

This is basic set up information if you have questions please leave it in the comments sections. Especially on stainless gravity makes it even easier. Tig root and hot pass 6 inch sch 80 6g pipe steel walking the cup tig root pass pushed in after hot pass proper tig weld open root weld penetration common problems with open root tig welds when it comes to open root tig welds there are some common problems but all of them are easy to fix. Recommended shielding gas for short circuit stainless steel mig welding is a tri mix shielding gas.

Tig root pass on carbon steel pipe 07 27 2009 06 29 pm.