tig welding cromemoly

[john vannatter]

i recently did some cromemoly tig welding i used argon gas hi tensile tig wire .i did not receive the hi quality weld that i would have with other
materials .i was wondering what different products or techniques i
could use to gain maximum strength and penetration and a high quality
look.most important of all the bond before beauty.


over & out
jv

[dyn88]

crmoly is funny stuff. I usually clean all the copper off the rod with scotch brite, deburr and cleant the area with a stainless brush and finally acetonne wipe.(seems like overkill but makes for a perty weld). use a gas lense and fast travel with good heat. Ive never used a pulse machine but I bet youll get some good answers from the seniors here.

[HAWK]

John,

Welcome to the forum!

Dyn has the cleaning covered. I like an ER80S-2 for filler. It can be had w/o the copper coat for a price.

[dyn88]

interesting how the wire without copper coat is more expesive huh?

[HAWK]

DYN88,

I don't think there is a lot of demand for it. I wonder if it is harder to manufacture or if it is harder on the machinery to draw it out without the copper coating?

[dyn88]

I was under the impresion the copper was for corrosion resistance. If solid tig wire is manufactured like any other wires than it starts out as a large diameter billet and is rolled down to the appropriate size. I this wrong and if so how do the manufacture ti wire?

[eric75]

My understanding is that reason for the copper coating is to prevent rust. Seems to me that supplying rod that is rust free puts a large demand on the supplier... The uncoated rods probably require special handling at every step in the process, where the copper rods are more forgiving. If you don't have a rod storage oven, they can have a short shelf life.

I do agree that uncoated rod makes for cleaner welds.

[Paul Seaman]

Eric75:
Normally they are in sealed packages and desicant packages to absorb the humidity. They keep alright with a sealed container and desicant and for that matter you can use a green scotchbrite and knock off the oxidation quickly.

Peace,