×
INTELLIGENT WORK FORUMS
FOR ENGINEERING PROFESSIONALS

Log In

Come Join Us!

Are you an
Engineering professional?
Join Eng-Tips Forums!
  • Talk With Other Members
  • Be Notified Of Responses
    To Your Posts
  • Keyword Search
  • One-Click Access To Your
    Favorite Forums
  • Automated Signatures
    On Your Posts
  • Best Of All, It's Free!
  • Students Click Here

*Eng-Tips's functionality depends on members receiving e-mail. By joining you are opting in to receive e-mail.

Posting Guidelines

Promoting, selling, recruiting, coursework and thesis posting is forbidden.

Students Click Here

Jobs

Brazing 441SS to 441SS

Brazing 441SS to 441SS

Brazing 441SS to 441SS

(OP)
Hi all,
I apologize if this is the wrong subforum for this. We are brazing a 441SS bushing (4mm thick) to a 441SS pipe (1mm thick). Our company has not done brazing before and I'm having trouble finding the appropriate filler material and flux to put on the drawing. The only requirements we would have is that it needs to be able to withstand at least 650°C and support vibrations you'd expect to see in a vehicle's exhaust system.

Any suggestion on what to go with? Thanks!

RE: Brazing 441SS to 441SS

At 650 deg C exposure temperature, braze metal will be ineffective. You need to consider autogenous welds using GTAW.

RE: Brazing 441SS to 441SS

(OP)
I see a number of high temp filler materials rated for 800°C+ so I've got to believe it's possible to find something.

RE: Brazing 441SS to 441SS

The problem is not the melting temperature but that the silver braze metal will creep and loose strength. If you decide to braze, go with the silver braze/flux for stainless steel.

RE: Brazing 441SS to 441SS

The only typical fillers that would come close are the BNi series. For ASME Section VIII, they are allowed to be used up to 650C without any special testing. However, some are a bit brittle, so I'm not sure about the vibration requirement.

Red Flag This Post

Please let us know here why this post is inappropriate. Reasons such as off-topic, duplicates, flames, illegal, vulgar, or students posting their homework.

Red Flag Submitted

Thank you for helping keep Eng-Tips Forums free from inappropriate posts.
The Eng-Tips staff will check this out and take appropriate action.

Reply To This Thread

Posting in the Eng-Tips forums is a member-only feature.

Click Here to join Eng-Tips and talk with other members!


Resources