Hi there,
so finally my stumpjumper fsr '97 broke. Well, I guess the shore is a little bit to hard for it. Since I like it, it would be great if I could get it fixed (I won't ride it in the shore again).
I know this topic was discussed here before but I couldn't find a answer:
Does it make sense to weld aluminum?
Who can do it?
Thanks
:germany: http://oppelshausen.de
No.
no
no.
Heh, but seriously, if it broke at a weld, the frame is covered under a lifetime warranty…
If warranty doesn't work out, these guys are experts in welding aluminum. The company I currently work for relies on them for repairs to our aluminum products which handle upwards of 1000lbs of weight.
Wow - they must have a really big oven to heat treat all that stuff after they weld it!
It doesnt make sense to weld a bike, unless you can get it re heat treated, and then you need to repaint it. Dig out your receipt and get on the phone to your favourite Specialized dealer.
i bet for close to the cost of paying someone to repair your frame, you could get many' a cheap burly hardtail frame.
intelligent designer jeans
cornichons > dills
I'm not exactly sure about heat treating…I work for a company that welds a ton of aluminum and we don't heat treat anything?
Usually 7000 grade Aluminum doesn't get heat treated. 6000 grade gets the heat treatment as it's a lot softer than 7000, hence why you see it on monocoques and hydroformed tubes…
I'm no engineer but it's my understanding that welding decreases the integrity of aluminum by about 30[HTML_REMOVED]#37;. This drop in the integrity of the aluminum causes stress risers. Stress risers cause failures. Heat treating removes these stress risers by equalizing the integrity of the welded piece. Treating aluminum can also be done via chemical bath.
heat treatment for 6000 and 7000 series alumium is different, but both require it
they use alot of 7000 series in Taiwan and the time it takes in storage after production and then transport is often enough for the frame to harden post welding.
with 6000 series you often run a "T6" process which takes the alloy to a high temp to equalise the stresses, and after quenching with water it is then heated at a lower temp to harden.
I've done some T6 on 6082 and its very slow and time consuming, and you need a big oven with a high quality temp. controller, and a huge bath of water to quench it in.
Mythic / Da Kine / Esher Shore / Freeborn
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