[hillbilly69]

Say you have a 7018 rod now I can break that down and tell you what each number means, now I saw this and was hopeing someone could help me out, what is downhill api 1104 welding with 5pt for root pass, 70t for hot pass and 8pt for filler pass. I know what downhill welding is but sketchy on the api 1104 and I know what the root,hot andd filler passes are but not number letter combo's. Thank you for your help

[joelwelder]

5p is the root bead 70t is 7010 same as 6010 just higher tensile,8010 just higher tensile it may just be for testing to qualify you for all 3 filler metals but who really knows contractors tweak tests all the time to see if guys can really weld

[hillbilly69]

Thank you joewelder, now what is the api 1104 welding and the 5pt I understand about the others. Thanks again and I really appreciate it.

[jpence38]

API 1104 is the code that governs cross country gas line welding and allows downhill welding.
It's not 5pt or 70t or 8pt. It is as follows;
5p+ for the first pass (root)
70+ for the 2nd pass (hot pass)
8p+ for the filler pass and final cap pass
Those are Lincoln brand designations. 5p+ is a mild steel rod with a cellulosic flux. 70+ and 8+ are a low alloy rod with a cellulosic flux

[rickbreezy]

Huh, thata really interesting i never knew all that. I have also never seen a 7010 or 8010 rod. I'm guessing that they are both more fkuid like then 6010, or somewhat similer to 7018 and 8018. Can anyone offer a comparison?