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Re: [MW:27371] If a welder is qualified with SS (Stainless Steel) GTAW, He can weld CS Carbon steel GTAW?

By Materials & Welding
Since he may have used backing gas for SS gtaw he will not be qualified for carbon steel as we do not use backing gas for cs material. 
Alternatively u will have to use backing gas for cs as well


On Sat, Feb 24, 2018 at 3:33 PM, PK M
<pkmqaqc@gmail.com> wrote:
Dear Sir,

If a welder is qualified with SS (Stainless Steel) GTAW,  He can weld CS Carbon steel GTAW? Need code Referance...

Thanks.
PKM

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