Advertise on Bikeforums.net



User Tag List

Results 1 to 2 of 2
  1. #1
    Senior Member mudboy's Avatar
    Join Date
    Sep 2008
    Location
    Collegeville, PA
    My Bikes
    Ruckelshaus Randonneur, Specialized Allez (early 90's, steel), Ruckelshaus Path Bomber currently being built
    Posts
    1,355
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)

    Suitability of Reynolds 631 to fillet brazing?

    I'm about to build my first fillet brazed mountain bike frame (sloping top tube hardtail) and was considering using Reynolds 631 OS from Strawberry. I'll be using brass (though I can use silver if necessary). How suitable is this tubeset to fillet brazing, i.e. does it have shorter butts that are only good for TIG welding, or should it be OK for fillet?

    Thanks,

    Pete
    --~--~--~--~--~--~--~--~--~--~--~--~--~--~--~--~--
    Ruckelshaus Randonneur Ruckelshaus Path Bomber
    Flickr Photostream
    FrameBuilderSource.com Framebuilder Database

  2. #2
    Decrepit Member Scooper's Avatar
    Join Date
    Aug 2005
    Location
    San Francisco California
    My Bikes
    Waterford 953 RS-22
    Posts
    8,967
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Reynolds claims 631 is suitable for fillet brazing.

    http://reynoldstechnology.biz/our_materials_631.php

    "631 SEAMLESS AIR-HARDENING HEAT-TREATED STEEL

    Utilising the same chemistry as 853, this product is cold-worked and also has the advantages of air-hardening after welding. The alloy is a development on our famous 531 range with 10% higher strength. For cycling use, this provides tough, durable and comfortable frames particularly suitable for long distance riding, ATB and BMX . It has recently become available for touring and race fork blades.

    631 can also be used for sports car chassis, suspension units, motorcycle race frames etc. in welded and fillet-brazed structures. In most applications, it should not be necessary to stress-relieve the weld zone."


    Dave Kirk won "Best Fillet Brazed" at NAHBS this year using Reynolds 725.
    - Stan

Posting Permissions

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