Anyone good at BRAZING? --> brass screw to a steel conduit box???
Anyone good at BRAZING? --> brass screw to a steel conduit box???
(OP)
We tried brazing between the head of two little 8-32 brass screw and the metal conduit box... the customer wants it to be permanent/tamperproof and requested brazing....
unfortunately we dont have experience brazing and when we tried it looked like crap...
We are trying to use this bronzish lincoln electric brazing rod that comes with a flux coating that you can get a lowes.... its about 1/8" dia.... could be a few years old too
Is this rod crap? or too big? we are also using this little oxy-aceteline torch setup which uses the little mini canisters you can get a lowes...
would be be better trying a different method of fixing the screws to the box? you cant tack weld brass to steel enough to make it "permanent" could you?
unfortunately we dont have experience brazing and when we tried it looked like crap...
We are trying to use this bronzish lincoln electric brazing rod that comes with a flux coating that you can get a lowes.... its about 1/8" dia.... could be a few years old too
Is this rod crap? or too big? we are also using this little oxy-aceteline torch setup which uses the little mini canisters you can get a lowes...
would be be better trying a different method of fixing the screws to the box? you cant tack weld brass to steel enough to make it "permanent" could you?





RE: Anyone good at BRAZING? --> brass screw to a steel conduit box???
RE: Anyone good at BRAZING? --> brass screw to a steel conduit box???
Our web site has an awful lot of brazing info on it.
We use High silver alloys in the 49% to 56% for high strength and lower temperatures.
I have been brazing 30 years and doing failure analysis for maybe 20 years. I'm just not sure where to start with this question.
Feel free to call.
tom
Thomas J. Walz
Carbide Processors, Inc.
www.carbideprocessors.com
Good engineering starts with a Grainger Catalog.
RE: Anyone good at BRAZING? --> brass screw to a steel conduit box???
As you observed, you need a silver braze that melts a lot lower than your brass screws do. Those braze rods from Lowes you tried are intended primarily for repairs to steel parts, and are higher melting.
RE: Anyone good at BRAZING? --> brass screw to a steel conduit box???
RE: Anyone good at BRAZING? --> brass screw to a steel conduit box???
RE: Anyone good at BRAZING? --> brass screw to a steel conduit box???
RE: Anyone good at BRAZING? --> brass screw to a steel conduit box???
Zinc is in high Silver braze alloys as a temperature suppressant among other things. By the time you hit the Liquidus and achieved a proper flow you have lsot a lot of Zinc to fuming. The reflow temp is maybe 50 to 100F higher due to Zinc loss.
What about epoxy?
Tom
Thomas J. Walz
Carbide Processors, Inc.
www.carbideprocessors.com
Good engineering starts with a Grainger Catalog.
RE: Anyone good at BRAZING? --> brass screw to a steel conduit box???
RE: Anyone good at BRAZING? --> brass screw to a steel conduit box???
Seems like cleaning, prep, brazing/soldering, cleaning, restoring the conduit box finish would be mighty labor intensive, and might relax the screw's clamping force to boot.
RE: Anyone good at BRAZING? --> brass screw to a steel conduit box???
RE: Anyone good at BRAZING? --> brass screw to a steel conduit box???
In general, when you get to the point of using a process you know noting at all about, seriously consider how to accomplish the same task with tools and techniques you do know.
Steven Fahey, CET