I have welded copper to steel with MIG/MAG several times. But the copper was
thinner (2mm). Current was in the ballpark of 100A.
You need a lot of power and aim the arc more to the copper than the steel.
With the 8mm copper, I even would think about pre-heating it.
I would look at doing this with a silicon bronze, or some other
"bronze" type filler metal.
You do not want to melt the steel and copper together, they are
metallurgicallly not compatible and the weld would likely have severe
solidification cracking. The bronze type filler is more of a "braze
weld" where the base metal is not melted.
I assume you are talking about a copper layer between the chrome and
If that's the case, the copper is plated on, the steel and copper are
not melted and mixed together in any way.
If you are talking about welding through chrome/copper plating, this is
not a good idea for something critical to safety, but probably the
amount of copper in the plating is small enough not to cause
Nick Mueller wrote:
Welding copper to steels also doesn't mix it. You have the same process like
with brazing (brass also contains copper, like silver-solder). It is only
diffusing (at different degrees) on the contact area.
Look at it as kind of "reverse" process of MIG-brazing (don't know how you
call it), that uses Al-bronze or Si-bronze (both Al or Si in the 3% range,
rest is copper). You replace the bronze with steel and have nearly the same
effects on the boundary copper-steel.
1)Can you tell me which copper alloys are weldable?
2) I know the following copper alloys:
b)Copper nickels, nickel silvers
A) Aluminum Bronzes
F) berillium bronzes
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