re-heat treating frames

Discussion in 'Observed Trials Discussion' started by G-Jordan, Oct 13, 2004.

  1. G-Jordan

    G-Jordan Guest

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    Hi, I need to know how this stuff works. If someone welded a crack in a frame and then re-heatreated it, would it make the frame more brittle and likely to snap/crack in future. Also would having the frame heattreated again mess up a paintjob? Is it even possible to re heat treat a frame?

    One more thing, how will a frame last if a crack is just welded back up?

    cheers,

    george.

    p.s. if it makes any difference the frame in question is an es3 with a sparkly black respray.
     
  2. willapaj

    willapaj New Member

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    You need to specify if you're working with Aluminum or Steel...

    Supposedly, aluminum needs to be heat treated after welding. However, I had a Monty X-lite mod that I cracked 3 times and had rewelded. Cracks were in different places. So it can work to just reweld it.
    With Steel, I'm pretty sure you can just weld it no problem.
     

  3. WhiteRavenKS

    WhiteRavenKS Well-Known Member

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    it depends on the kind of material the frame is made out of. some aluminum doesnt need to be heat treated (6000 series- i think) where as some does need to be heat treated after welding (7000 series). depending on the paint job you will likely have to strip the frame down. you will have to take the paint off the cracked area anyways to get it welded.

    edit0- he did specify, hes on an es3=aluminum. i dont know what kind of aluminum thats made with though and i am only going by what i think i know. a real welder will know and can qoute you a general price as well.
     
  4. MikeTheBike

    MikeTheBike Active Member

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    I'm pretty sure the ES3 was 7005 Series Aluminum. It can still be welded and hold up without heat treating if the cracked area is sufficiently gussetted. Heat treating simply increases the strength of a given section of material. If you can add enough extra material, you can compensate for a lack of heat treating. Make sure the welder is *very* experienced. Welding Aluminum is not simple.
     
  5. Turtlehead

    Turtlehead Guest

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    Seriously, just use some J.B. Weld and you'll be better off, and probably save yourself more than $50... I've done it on several of my bikes and it works wonders... shoot, I've even fixed a motorcycle with that stuff.... don't try and weld it... too complicated... J.B. Weld my friend.
     
  6. Blackstick

    Blackstick Well-Known Member

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    Get onto austrials.com and ask advice from Jon Weaving from Gripsport. He has welded tons of frames, and none have ever had problems.

    He put gussets on his sons Monty between top-tube and seat-stay some years ago, then Monty came out with the same gussets ages later.

    He'll probably ask you to send your frame to him, and that may even be a good idea, he really knows what he's talking about. Just check it out and see how you go.
     
  7. bwagner

    bwagner New Member

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    I hope you're joking. I'm super bad at telling sarcasm from a bad joke, so excuse me if it went over my head. I'm guessing it's a joke because there is no way anyone would ever tell someone to just "use JB weld" on a frame. I hope:?
     
  8. aj2four0

    aj2four0 New Member

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  9. Tanner

    Tanner New Member

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  10. thetart20

    thetart20 TartyBikes

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    Preparation is important too... drill the ends to stop it spreading, THEN do what you need/want to do (weld, JB Weld, superglue, hair wax - whatever)
     
  11. Tanner

    Tanner New Member

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    And if its aluminum, grind and then wipe with acetone IMMIDIATELY prior to welding.
     
  12. Turtlehead

    Turtlehead Guest

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    no serious... I used JB weld on one of my old bikes, and it lasted until I sold it... and it was cracked at the head tube.. all the way around.........................................................................................................................................................................................................................
     
  13. Bloodhound

    Bloodhound Steffen L.T.

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    I rode a cracked and rewelded es3 for a year without problems. A dude in Edmonton did it, I am told the welder must have specific expirience in rewelding finished alluminum products of that series. 7005 Alu I believe.
     
  14. digby

    digby New Member

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    note to self: never buy a used frame from this guy.
     
  15. Turtlehead

    Turtlehead Guest

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    lol... naw, it was bought as a collector's edition... not for use...
     
  16. Turtlehead

    Turtlehead Guest

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    Ok... so yeah, I've never JB welded a bike frame.... that'd just be stupid, but I did JB weld the engine case on an old dirtbike one time... it held great...
     
  17. G-Jordan

    G-Jordan Guest

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    hey guys, cheers for the replys, I am wanting to swap the es3 for my koxx, as i love the way it rides and it has a pimp paintjob. The person i may get it from has put a hairline crack in the seatube so i am sceptical as to how it will last if its just welded. Obviously i don't want to swap my koxx and then have the es3 snap on me.
     
  18. austintrials

    austintrials I'm a bitch

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    ooooooops pasted when i should have been typing



    Suggested Filler Metals for Specific Requirements

    Material
    Welded


    Strength

    Ductility

    Color
    Match
    After
    Anodizing


    Least
    Crack
    Tendency


    1100

    4043

    1100

    1100

    4043

    2219

    2319

    2319

    2319

    2319

    3003

    4043

    1100

    1100

    4043

    5052

    5356

    5654

    5356

    5356

    5083

    5183

    5356

    5183

    5356

    5086

    5356

    5356

    5356

    5356

    5454

    5356

    5554

    5554

    5356

    5456

    5556

    5356

    5556

    5356

    6061

    5356

    5356

    5654

    4043

    6063

    5356

    5356

    5356

    4043

    7005

    5356

    5356

    5356

    5356

    7039

    5356

    5356

    5356

    5356
     
  19. Turtlehead

    Turtlehead Guest

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    that's a lot of numbers... I'd stick with J.B. Weld... 50/50