Under D1.1 If a welder qualifies using E7018 on DCRP will he/she be allowed to weld in the field using a different current/polarity? If a welder qualifies using the GMAW process DCRP and 75%-25% would he/she be qualified to weld with the same process in the field with a different shielding gas?
Check out Table 4.11 in D1.1:2002. It shows you the essential variables changes that require a welder to requalify. I think this will answer your question. Hope this helps, John Wright PS: this Table goes along with paragraph 4.22