GTAW
GTAW
(OP)
Why is a purge or backing gas not necessary when welding carbon steel using the gtaw process but is necessary when welding higher chromes. Is it the chrome content?en
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RE: GTAW
Yes.
RE: GTAW
Steve Jones
Materials & Corrosion Engineer
http://www.pdo.co.om/pdo/
RE: GTAW
Above a certain content of Cr in the material, if i remember well 5%, you always need the back puring.
Strider
http://www.corrosionist.com