Q: The Fusion Pass- Mtbr.com
Results 1 to 5 of 5
  1. #1
    mtbr member
    Reputation:
    Join Date
    May 2013
    Posts
    17

    Q: The Fusion Pass

    Folks,

    After watching Zanc + Jody's video on welding TI I got to wondering if doing a fusion pass on steel would be beneficial in any way.

    Other than doing a fusion pass on welding coupons when I started learning I've never needed to do it --- but I don't fab stuff for a living and certainly wouldn't call myself a welder.

    Thoughts?

  2. #2
    Frame Building Moderator
    Reputation: Walt's Avatar
    Join Date
    Jan 2004
    Posts
    7,489
    Steel behaves very differently than ti in terms of viscosity when liquid (fusing it without filler is MUCH easier), and you're *usually* also welding much thinner wall tubes. Fusion passes are a recipe for blowing holes in the tubes, for no practical benefit.

    That said, IMO fusion passes on ti are kinda silly too, but the "perfect stack of dimes" look is much easier to achieve if you do it that way.

    -Walt

  3. #3
    Plays with tools
    Reputation: customfab's Avatar
    Join Date
    Jun 2008
    Posts
    4,642
    If you can't weld tubing that's literally as thick as a heavy sheet of paper in a single pass, you need to learn to weld. There's no structural reason to weld thin wall steel or titanium tubing in more than one pass. Generally speaking, the less heat you can put into a weldment while getting sufficient penetration the better off you are.

  4. #4
    Frame Building Moderator
    Reputation: Walt's Avatar
    Join Date
    Jan 2004
    Posts
    7,489
    Meh, it's SOP with ti and it seems like it works fine. I'm sure you could do it with steel too and unless you were a hack, it would be fine too. Is it desirable to heat stuff up and cool it down twice rather than once? Of course not. Is anyone going to freak out about perfect pretty welds on a painted steel frame? No, probably not.

    There's a reason I don't do ti for people, and it's because a large portion of ti people are kinda nuts. I've done pretty decent looking one-pass welding on ti, but nobody would pay for it. I'd have to go wash back over everything just like every other builder so that the welds look "right" to customers, because a big chunk of what the ti bike buyer is looking for is that specific weld look. On steel nobody cares as long as it looks decent and doesn't come apart.

    -Walt

  5. #5
    mtbr member
    Reputation:
    Join Date
    May 2013
    Posts
    17
    Thanks guys. Makes sense.

Similar Threads

  1. X Fusion Velvet vs. X Fusion Velvet Shox?
    By pattongb in forum Beginner's Corner
    Replies: 0
    Last Post: 01-18-2012, 04:12 PM
  2. Replies: 5
    Last Post: 09-29-2011, 09:40 PM
  3. The Colorado Trail - Kenosha Pass to Georgia Pass ONB
    By Evil Patrick in forum Riding Passion
    Replies: 1
    Last Post: 09-14-2011, 08:22 AM
  4. French Pass..the orginal pass
    By mountaingoatepics in forum Colorado - Front Range
    Replies: 16
    Last Post: 09-06-2011, 05:43 PM
  5. tibiotalar fusion / ankle fusion
    By dadat40 in forum General Discussion
    Replies: 8
    Last Post: 05-07-2006, 07:13 PM

Members who have read this thread: 0

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •  

THE SITE

ABOUT MTBR

VISIT US AT

© Copyright 2020 VerticalScope Inc. All rights reserved.