Thread: 55 Wagon Progress

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Here's the flattened copper pipe using a rare earth magnet for hands free/clamp free operation..




Shown here as a backer for filling too wide of a gap..





The problem we found was that the back side of the weld, which was against the copper, gets a bit of contamination/porosity.





I've found that the copper buss bar (electrical) does not show this same issue. Not sure if the pipe has elements added to promote solder wetting, or what the issue is. But for the holes welded yesterday using the buss bar, the front and back looked the same. We have since stopped using the copper pipe. When we weld the holes in the passenger side wheel wells I'll have to get some comparison pictures. We also now have a section of the buss bar that's had offset bends added to the ends for attaching magnets where they will remain flush.

Originally Posted by MP&C

Here's the flattened copper pipe using a rare earth magnet for hands free/clamp free operation..

I've found that the copper buss bar (electrical) does not show this same issue. Not sure if the pipe has elements added to promote solder wetting, or what the issue is. But for the holes welded yesterday using the buss bar, the front and back looked the same. We have since stopped using the copper pipe. When we weld the holes in the passenger side wheel wells I'll have to get some comparison pictures. We also now have a section of the buss bar that's had offset bends added to the ends for attaching magnets where they will remain flush.

There are a couple different types of "pipe" / tubing in copper, the one most of us know is used for refrigeration, this is a different alloy than say regular water pipe. Just like brass fittings, there is a class known as red brass, again a different alloy which is used for higher pressure applications.