Cycling and bicycle discussion forums. 
   Click here to join our community Log in to access your Control Panel  

Go Back   > >

Framebuilders Thinking about a custom frame? Lugged vs Fillet Brazed. Different Frame materials? Newvex or Pacenti Lugs? why get a custom Road, Mountain, or Track Frame? Got a question about framebuilding? Lets discuss framebuilding at it's finest.

User Tag List

Thread Tools Search this Thread
Old 04-24-10, 11:53 AM   #1
Senior Member
Thread Starter
mudboy's Avatar
Join Date: Sep 2008
Location: Collegeville, PA
Bikes: Ruckelshaus Randonneur, Specialized Allez (early 90's, steel), Ruckelshaus Path Bomber currently being built
Posts: 1,353
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(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?


mudboy is offline   Reply With Quote
Old 04-24-10, 05:43 PM   #2
Decrepit Member
Scooper's Avatar
Join Date: Aug 2005
Location: San Francisco California
Bikes: Waterford 953 RS-22
Posts: 10,466
Mentioned: 41 Post(s)
Tagged: 0 Thread(s)
Quoted: 453 Post(s)
Reynolds claims 631 is suitable for fillet brazing.


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

my bikes

Science doesn't care what you believe.
Scooper is online now   Reply With Quote

Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

All times are GMT -6. The time now is 04:40 PM.

  • Ask a Question
    get answers from real people!
Click to start entering your question.