weld this to that

Jul 02, 2012 5 Replies
S

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)



Steve


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I

Will the loads be anywhere close to the working load rating of the shackle?

If not, I personally would not worry too much.

i
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C

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.

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J

Now that it's too late to thread it in a lathe,

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jsw

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I

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I have a bucket of those for sale

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I

Then you will be fine. I would worry about other things, not the shackle breaking..

Next time, heat the rod to red hot prior to brnding. O/A works great for this.

i
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