For the rest of the gruppen- 6-10's is 6010 pipe rod-- lINCOLN CALLS IT 5-P passes from root, fill and cap in 2g, 3g and 4g- are 2g- vertical down, 3g vertical up, and 4g- horizontal 5g is overhead, and 1G is flat or downhand- 6010 is AWS code for API code rod- the 60 means 60,000 psi tensile strength after the weld area is stress relieved, and 10 means- penetrating arc, as this rod can only be run set on DC reverse polarity, hard arc with light slag- fast freeze as Lincoln likes to call it--
Best rod like this for farmers who have a Lincoln AC 2225 60 AMP draw transformer welder is 6011- just as 6010, but the extra (1) means stabilizer to run on AC current, or DC either polarity-
Lincoln also makes another great API pipe rod-- called HYP-- it is a AWS 7010, 10K greater tensile- we ran it a lot in 1/8" dia for root pass work- and in the trade- we called it "Hippie Rod"--
