Jim,
You do not want to mig 4130! Tig or gas is the only way to properly weld it As
for your design, I would have to see a drawing to better analyze it.
joe
"Waldron, James" wrote:
> If I may take a moment to learn from others experience.
>
> For a motorcycle streamliner frame. (somewhere around the half
> liter class.)
>
> I'm thinking 1020 cold rolled mandrel drawn seamless tubing
> in 0.095 or 0.125 wall. (1 1/4 inch O.D. as per rule book.)
>
> I'd like to use some 4130, at least for the plate on the top
> of the roll bar. Maybe 4130 for the main roll hoops - not sure.
> (Toughness seems to be more important than strength at what I expect
> to be a low weight (4130 can be a bit brittle) but I'm open to
> suggestion. Should I stick with just 1020 or go total 4130?)
>
> Any issues welding 4130 to 1020? (I will stress relieve the weld.)
>
> I'm thinking Oxweld 32, 0.035 wire, MIG welder, CO2/Argon mix (though
> I'm considering straight CO2 for better heat and penetration.)
>
> If you have an opinion or suggestion I'd really like to hear it!
>
> (Working on this is hard. Every time I sit down to work on it I
> start thinking about Don and the others we've lost this year, and
> I can't seem to keep concentration. But then there's that message
> coming in from somewhere saying, "Go ahead. Do It.")
>
> Thanks,
> Jim W.
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/// what is needed. It isn't that difficult, folks.
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