Hi fellas
First post and just my 2cents worth on this topic.
In my very humble opinion a certified welder (particularly AS1796) has gone to some effort regarding education and theory and knows a great deal more about why (heat input etc) welding metallurgy (heat affected zones and the like) wheras a qualified only welder may not even have trade papers and just learnt to pass an xray test.
Years ago a leading Perth fab company was paying $1 per hour more for Coded welders with AS 1796 for this reason.I personally beleive this is a true coded welder.
And yeah they still need to qualify for each job/employer etc