Stress Relieving of 304L Stainless brazed with OFHC Copper
Stress Relieving of 304L Stainless brazed with OFHC Copper
(OP)
I'm doing some research into Stress relieving of a stainless steel (304L) part that has been vacuum brazed to OFHC copper. My issue is finding the correct constraints (eg... Temp,Heat time,Cool time) in which the stainless can be stress relieved without softening the copper. If anyone has some info on the subject to offer up it would be much appreciated.





RE: Stress Relieving of 304L Stainless brazed with OFHC Copper
RE: Stress Relieving of 304L Stainless brazed with OFHC Copper
RE: Stress Relieving of 304L Stainless brazed with OFHC Copper
Stress relief after machining could result in similar distortion so you need to review your machining process to reduce residual stresses.
RE: Stress Relieving of 304L Stainless brazed with OFHC Copper
http://www.bssa.org.uk/topics.php?article=76
RE: Stress Relieving of 304L Stainless brazed with OFHC Copper
You could re-heat the entire unit to a temp below the brazing temp and then gently cool it.
However you may be sensitizing the SS in the process.
= = = = = = = = = = = = = = = = = = = =
P.E. Metallurgy, Plymouth Tube
RE: Stress Relieving of 304L Stainless brazed with OFHC Copper
RE: Stress Relieving of 304L Stainless brazed with OFHC Copper
You need to worry about re-melting the braze alloy.
What is the solidus temp of your braze?
= = = = = = = = = = = = = = = = = = = =
P.E. Metallurgy, Plymouth Tube
RE: Stress Relieving of 304L Stainless brazed with OFHC Copper
There is also the CTE mismatch between cres and copper to consider. Might look at modifying the joint design to minimize the residual stress caused by the CTE difference at the brazed joint interface.