Materials for small parts- Mtbr.com
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  1. #1
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    Materials for small parts

    Hi guys, im looking to make some dropout plugs, to attach seatstays to dropouts with. I have a lathe, the fabrication side isnt a particular worry. However im not sure what grade of steel i should be using to make such a part? Can i use just mild steel? id like to as i have lots around. The paragon plugs are 1018 steel, how does that compare to mild?

    Thanks
    Max

  2. #2
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    1018 is mild steel and is fine for the little bits that you describe.
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  3. #3
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    If its ok i would use same thread since its almost the same topick,.. is there any page on internet how do different metals weld togeher? i am designing my first frame and i would like to cut some parts on laser. I can cut steel or stainless steel, which one do you recommend for Cr-Mo tubes?

  4. #4
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    I'm assuming you're TIG welding the frame. 1018 mild steel welds fine to 4130 Cr-Mo tubes with ER70S-2 filler rod. If you're gonna make the parts out of stainless, that gets out of my range of knowledge, but if I recall correctly, I read that Weldmolt 880 filler rod can work for TIG welding stainless to regular steel. I recommend you look into this filler rod material.

  5. #5
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    Thanksfor the help guys!

  6. #6
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    I work as a welder/fabricator. We use 309L filler to TIG weld stainless and mild together, tho there may be other choices for SS to chromoly.

  7. #7
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    Keep in mind there is a staggering array of stainless steels and not all of them like to be welded to dissimilar metals. 17-4 is the go to for structural items like dropouts, since it has almost 3 times the yield strength of 304.

    Weldmold 880 seems to be popular for welding 17-4 to chromoly, but I don't have any experience with it because it's astronomically expensive. I use ER312 when doing any stainless to mild or chromoly steel, and it works very well. I've also heard of folks using ER309L like Mcclurch mentioned, but more often in the fabricating world than the framebuilding world. Not sure why.
    Myth Cycles handbuilt bike frames
    Durango, CO
    http://www.mythcycles.com

  8. #8
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    thanks for all the answer, i am almost done with frame design and now comes the devil and the details,.... . Just wondering do you make cable guides/holder on your own or do you have some link to buy them online and than just weld them to frame

    thanks, Luka

  9. #9
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    Quote Originally Posted by ViiLu View Post
    thanks for all the answer, i am almost done with frame design and now comes the devil and the details,.... . Just wondering do you make cable guides/holder on your own or do you have some link to buy them online and than just weld them to frame

    thanks, Luka
    Googled it for you:
    https://www.google.com/search?source...4dUDCAc&uact=5
    Myth Cycles handbuilt bike frames
    Durango, CO
    http://www.mythcycles.com

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