I need to beef up and re-weld the tabs on my subfame for the muffler that I broke off and I need to know what grade aluminum the subfame is made out of. Thanks! -Blake
Good question,,, I don't know if it is pure aluminum or if it is a aluminum alloy. Do you plan on welding it yourself??
Don't know what grade it is, but like someone said, the 6061-T6 shouldn't give you a headache. I'm curious, ask your dad what choices he has for rod. Also, after he's finished could you post what rod he choose and how he made out? ( I'd be nice for forum info.) I straightened my slightly bent ones...no problem, but if they were broken, I'd make alter the design. Stock ...each hanger is actually a pair of tabs welded close to each other on the underside of the frames square tube and then welded to each other along their perimeter. I'd do the same thing only space them apart more ....one outboard of the frame tube and one inboard of the frame tube. Then bring them together ...weld together, just above the bolt hole for the muffler. Might require doing away with the 1/4" thick spacer on the bolt...no problem. Or, if dad has some alum. plate as thick as the frames square tube, use it and weld all around. That'd be a pretty big chunk though. Dave
subframe 6061 is too hard , you should go with a 5000 series alum. it will , be fine for tabs, which should have a llittle give to them, go with the 5000 series. 5082 or 5086 .. been fabricating and welding for 30 years.
I'm a machinist, not a welder so I wouldn't know. But I have had my tabs on my 06 CR 125 welded with 6061 and it held up fine. But it did not look the greatest!! Pictures would be great!!! And let us know what they used....
One more thing, the subframe has a clear anodize on it i think so make sure you clean that off around your weld area so you dont contaminate your weld.
Next time I'll know to remove the anodizing (thanks huskymax!)... added 6061 tabs in the recess and used ER4043 rod
