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Gas Pressure For Welding Stainless Steel. Pure argon is by far the most common gas for root protection of stainless steels. Typical gas flow when MIG welding varies for different inside nozzle diameters.
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For ½ inch nozzles your typical flow setting should be around 22-27 CFH. This is the gas that will duly protect our work from all sorts of atmospheric contamination. Duplex Stainless Steel Tack welding To prevent shrinkage during welding precise tacking is important.
For material up to 6mm tack length should be 10-15mm.
Well it can happen when you heat the stainless steel material for too long and at a temperature of 800 1400 degrees Fahrenheit. Although the gas flow rate will depend on a lot of factors as I have explained before the preferred range for working on stainless steel is around 20 to 25 CFH. I find that using around 35-45 cfm on stainless seems to have a slight cooling effect and enables me to get better color from the weld. Above 6mm tack length should be 20-25mm.
