[Coldman]

Here's a 3/8" coupon guys.
1/8" 7014 triple run fillet, 135 amps, 30% dig.

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Would you trust this for a portable shop loading beam with chain block say 500kg (1100LB) each end plate on a 6x3" I-beam?

[Poland308]

Are you just using it to weld on the stop plates that keep the trolley from running off the beam?

[Coldman]

They would be 4 bolt end plates for attachment. Only one job planned for it. May be a while before it gets used again.

[Coldman]

I'm going to put the coupon in a 20T press on Saturday to see what happens.

[DLewis0289]

What is the pound (kg) per foot on the shape? Is it a W or I?

[Poland308]

I don't know enough about engineering specs to give a good answer but I know enough to say it should come down to proper lay out, fillet size, and weld location in respect to directional forces. In the pic it doesn't look like it penetrated very deep into the joint. But I haven't used 7014 much that may be normal. Being it's a 70 series rod means 70,000 psi tensil strength so between that and the overall design of the frame. Is it going to be a moveable unit or is it getting welded to stationary uprights?

[Coldman]

Thanks for your input guys. I don't want to get too much into the engineering design of structures etc. The design is good, loading can be considered light, absolutely no overloading or close to. Normally, for a joint such as this you would reach for a low hy rod 7016 or 7018.
I have this job coming up in a couple of weeks which gives me time to consider options and method. I have a packet of 7014 on the shelf so I thought I would see how it stacks up. Penetration is there but not brilliant, similar to what you can expect from mig and plenty of work is done with mig. I'm taking the time to slice and squash it to be sure. I will probably go for 7018 because of the nagging feeling I have, but I thought to seek your opinions because maybe I'm being over cautious and the 7014 as shown is probably going to do the job well in this case.
So basically what I am asking is to ignore rod type and steel design and focus on the macro. If you saw it on a 1T monorail (and plenty of it) would you be ok with it or run away screaming?

[MinnesotaDave]

I'm a 7014 fan. I like the way it runs and the penetration is fine as long as it's run with enough amps.

If the type of material calls for a low-hydrogen rod, then that's what I would use.
If it's regular mild steel, then I have no problems with 7014.

[Otto Nobedder]

I see no problem with the macro.
I'd try for a better fit in the working part, though.
The gap behind the root makes two problems; it gives room for flex, and makes a stress riser in the root.

Steve S

[Coldman]

Thanks Dave.

Thanks Steve, agreed on the fitup which is different to an end plate on an I beam. The coupon was tacked on the ends only and pulled with welding. Didn't much care, was only interested in the peno. Gonna squash it anyway.

[Coldman]

Tried breaking it today in a 30T powered hydraulic press. 1st time it shot into the solid steel guard like a cannon ball. Second time it just sat there not moving while the pump struggled. Guess it's strong enough for me.