Back in the 1970's we only used 6010 on pipe. This was before 7018 became popular.
All 3 passes were done in 6010. There was even a TEXAS WEAVE that was big hit back then. The old guys were awesome with this stuff. One guy told me he used to weld on Navy ships with it all day long. You had to turn in your stubs to get more rod. That was when a welder came to the job with his leather shopping bag filled with his goodies. Now some guys use 5 gallon buckets.