welding a chromoly frame?

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welding a chromoly frame?
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Posted: Jan 9, 2008 at 19:54 Quote
so i may be able to get my hands on a frame and theres two small hair line cracks behind the seat stays (i think thats what there called) would it be alright just to weld it and i only weigh around 120 pounds

Posted: Jan 9, 2008 at 19:56 Quote
strip the paint and braze it it should be fine.. but go to my profile click on kmz and look at the pic of his snapped 416 that was because the welder was too hot when he got it repaired

Posted: Jan 9, 2008 at 19:57 Quote
haha ya its like a 2005 416 or something haha

Posted: Jan 9, 2008 at 20:00 Quote
braze it you should be fine

Posted: Jan 9, 2008 at 20:03 Quote
alright sounds good and you can run 24s or 26s on it right??

Posted: Jan 9, 2008 at 20:05 Quote
MIG weld if you can, brazing is extremely weak

Posted: Jan 9, 2008 at 20:07 Quote
oh ok well i ll just take it to a welder and he can do what he wants to it haha but ill see if i can post pics of it. it will have to be a super buget build i barely have any money but i do have some parts lying around.

Posted: Jan 9, 2008 at 20:08 Quote
1589141

1589141

ala mig weld Big Grin
hope your face will be restored keith xD

Posted: Jan 9, 2008 at 20:10 Quote
holy crap oh w.e im not to worried

Posted: Jan 9, 2008 at 20:10 Quote
wow, someone sucks with a MIG

Posted: Jan 9, 2008 at 20:11 Quote
ajaxpowder wrote:
[PI=1589141 size=m align=c]ala mig weld Big Grin
hope your face will be restored keith xD

Was it heat treated? I think (i'm not an expert) heat treating would've prevented this. Maybe Hummeriod will help me out on this one...

Posted: Jan 9, 2008 at 20:11 Quote
can you get shwable table tops in 24s???

Posted: Jan 9, 2008 at 20:12 Quote
im not sure.. it lasted for four hours before total face destruction xD

Posted: Jan 9, 2008 at 20:13 Quote
yes, you can get schwalbe TT in 24, folding or wire bead, very light and awsome traction, only 25$ per tread too

Posted: Jan 9, 2008 at 20:16 Quote
Yes it can be welded. Cro-mo does not require extensive heat treating after welding, so it will be fine. If you were to do this with aluminum without heat treating, it would snap very quickly. I don't recomoned mig or stick welding as it often ends up with much more material than you want, and is easy to run too cold. TIG is by far the best, or it could probably done with a torch if you are good enough. I'm not 100% sure but i think you need special rods to weld cro-mo, but i could be wrong. And yes, brazing is weak, however i have seen frames 100% brazed, but i don't think they will ever leave the ground.

And as for the pic above, That has nothing to do with welds, it snaped right in the middle of the tube. It would be an exceptionnely good weld to snap a tube like that clean off.

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