Alum Tubing Thickness for Go-Kart

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Theres a good deal for aluminum tubing on eBay.  1"x 96" x .075.  $125 for 9 pieces.  Would this thickess be enough for a small go-kart for the kids?  I'm thinks low speed, not more than 10 mph.  Would need to support 50# max.  Figured on a tria angular brace at every corner.  Thanks
Reply:Alloy is 6351
Reply:Why not use mild steel?  It's cheaper, easier to weld, doesn't have fatigue problems, usually has a higher yield, and easy to find at any metal supplier.Someone else with more aluminum experience might comment, but the 0.075 wall seems very thin to me.  The new tubing may be adequate.  Will is be adequate when it has a little dent in the side, or will the tube collapse?Dynasty200DX w/coolmate1MM210MM VintageESAB miniarc161ltsLincoln AC225Victor O/A, Smith AW1ACutmaster 81IR 2475N7.5FPRage3Jancy USA1019" SBAEAD-200LE
Reply:Never saw a Go-Kart with an aluminum frame.......I would use something like .065 mild steel....You can pick up Imick  Frames for cheap on E-Bay why build one?  Miller Dynasty 350Twenty Six HammersThree Crow BarsBig Rock
Reply:I know from the bicycle frame builders that after welding, the aluminum frames must be post weld heat treated in an oven.  (I've seen numbers in the range of 750F for four hours.. but do your own research..)  Do you have access to an oven big enough for the entire frame?If you want a light weight frame, what about picking up tubing from chromoly steel tubing from aircraftspruce?  It's pretty cheap if you shop for their high runner sizes.  Fillet braze or TIG the joints together.  Or use square tubing (1/16" wall?).. fit up tends to be easier... material should be available locally to you.  Its a little bit heavier, not as strong in torsion as round tube, but for a go kart, but what the heck. --zip
Reply:I have made a few gocart frames with steel, much easier to use and cheaper. holds up to the crashes the kids put it through..and VERY IMPORTANT....ROLL CAGE... to protect from running into objects..several bars running from overhead down to front of carts will protect if they run into fence or barbed wire...Of all the things I lost I miss my mind the most...I know just enough about everything to be dangerous......You cant cure stupid..only kill it...
Reply:for that size and thickness of Al tube i would say no for a single tube frame but as a double tube it would work. but then you have to consider any add on parts necessary to put everything else on it to make it a working cart such as engine mount, axle supports, steering components, seat mounts, pedal mounts, roll cage, etc will (should) also be aluminum so the price jumps for a cart that only a small kid can ride for a short time and grow out of it. i myself would, like other said build it out of steel and also make it bigger so they can enjoy it for years to come. just put a throttle limiter on it for the small ones and as they learn and grow pull off the limiter and crank it up.225NT bobcatAEAD200LEScott 125mm175, mm252 w 30A, PT225mm211, TA 181iHyper Therm 380, cut master 529100X & XX, Digital Elite6 Victor setssmith little torch, meco midget kalamazoo band sawsteel max saw evoulution circular saw
Reply:Originally Posted by B_CNever saw a Go-Kart with an aluminum frame.......I would use something like .065 mild steel....You can pick up Imick  Frames for cheap on E-Bay why build one?
Reply:Originally Posted by roadkillbobbI have made a few gocart frames with steel, much easier to use and cheaper. holds up to the crashes the kids put it through..and VERY IMPORTANT....ROLL CAGE... to protect from running into objects..several bars running from overhead down to front of carts will protect if they run into fence or barbed wire...