We are using 75% 25% gas and Pinnacle Alloys Premier S6 AWS Class ER70S-6 AWS A5.18 ASME SFA 5.18 ; CWB approved And will be welding 3/16" T-1 web flange to 3/8" T-1 top and bottom flange. and the flux they suggested are as follows http://www.hobartbrothers.com/uploads/pdf/datasheets/Excel...

Hi we are refurbishing a semi-trailer and our welder has been working on heavy haul semi-trailers for over 30 years and has always used mig and the company we are doing this trailer for wants us to use .045 flux dual shield for this job.....any pro's con's or suggestions on which way to go.....he is...