Thank you for all the input so far.
Flat position, 3 passes, 1 root, 2 bead cover split side to side.
I spoke to the foreman of the shop who made the coupons for me, he's not sure if the plates are A572-50 or A36. Yeah I know I need to keep track of this type of thing, it's just a busy week and I thought he'd do that automatically, I'll keep a closer eye on it in the future. I'm sure the backing bar is A36, it's just regular 1"x 1/4" bar stock. the bevels were cut on the band saw nice and clean and sharp, no contamination.
I wish I had brought them home to take a picture of them. the breaks look like they took alot of strain before they let go. I use a manual porta power to bend them in the jig, and I swear just by the feel that these coupons got harder to "bend" just before they split, like it was resisting the deflect any more and just ripped loose.
I still want to get into the size of our plunger and die, I think that might be it, I measured it real quick and it was like 1" 1/2" plunger and I know 2"3/8 die, I have to go through the figure in the code to compare it. Has anyone else used the same die setup for side bends and face bends with any problems?
Chris