I have a 1953 swinging-arm ES2 frame of oven-brazed construction with pinned joints.
1. What is the tube material?
2. Can the tubing be welded safely or must it be brazed?
3. What material would have been used for the lugs?
Thank you!
I believe cast iron lugs and…
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As Dan says...the…
As Dan says...the description "mild steel" on this context really means one that gains its strength from its constituent materials and not from heat treatment. So it can be welded because it has not been through a hardening and tempering process.
The lugs were (I'm pretty sure) a malleable cast iron... similar to footpegs...which can be bent a certain amount without breaking, unlike ordinary cast iron which is too brittle to bend without breaking.
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Thanks... that makes sense…
Thanks... that makes sense. For example, it looks like the screw tabs for the tool box are welded directly to the tubing.
Three lugs on this frame have been either ground down or repaired by arc-welding tubing to the lug. If the lugs have been welded to, are they now junk? Can I rehab them or am I better off transplanting a clean lug from another frame?
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I believe cast iron lugs and mild steel scaffold tube! Seriously though, no reason why you can’t weld the frame tubes, but I think the lugs should be brazed in place