I want to weld a 3/4" shackle to a 3/4" round rod of cold rolled steel. I
intend to use 7018.
What can I expect in brittleness?
I cold bent the 3/4" rod into a J shape for a hook to skid logs. I used my
bare hands. Nah, I used a cheater bar. Well, actually, a friend and I were
required with an 8' cheater pipe. I was really impressed.
There isn't much of a way to make an attachment point without some welding,
and I know that will affect the properties. I just wonder how much I am
going to lose.
This will be fun to field test in a DT or UUF mode. (Destructive Testing,
and Use Until Failure)
If it is mild steel you should not loose much. The SECRET is to
drill the shackle for a tight fit over the rod and chamfer the end of
the rod and the hole where the rod comes through on both sides,
welding it on the back side - basically a "plug weld" Definitely do
it with a stick welder - much easier to get a good job than using a
wire-feed. The chamfer on the hole where the rod comes through
eliminates a sharp stress rizer, and welding the back, plug style,
keeps the heat affected zone back in the "supported" area instead of
out beyond the exposed weld.