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farmboy11 (Mechanical) (OP)
5 Oct 10 12:50
Hi,
I'm bending a plate of AR400(20"x4"x3/4") 90°, then when the part is in use there is a force on the in the direction to unbend the part. My questions are; how important is the grain direction of the AR400 to the direction of the bend? does the plate need to be stress relived to the part doesn't unbend? or should the part be forged then quenched to help it retain its shape?
Thanks
Metalguy (Materials)
5 Oct 10 14:29
What is the bend radius?  It is best to have the rolling direction at 90 deg to the bend, not parallel to it.  Just bend it and use it.

"You see, wire telegraph is like a very long cat. You pull his tail in New York and his head is meowing in Los Angeles. Do you understand this? Radio operates the same way: You send signals here, they receive them there. The only difference is there is no cat." A. Einstein  

farmboy11 (Mechanical) (OP)
5 Oct 10 16:32
The bend radius is 4", does the radius make that much of a difference? Also, what is the likely hood that the bent part will drift back?
Metalguy (Materials)
5 Oct 10 16:44
Without doing the math, a 3/4" thick plate bent with a 4" radius doesn't sound like you should have a problem.

The bent part should not spring back over time.  What does the part do?

"You see, wire telegraph is like a very long cat. You pull his tail in New York and his head is meowing in Los Angeles. Do you understand this? Radio operates the same way: You send signals here, they receive them there. The only difference is there is no cat." A. Einstein  

farmboy11 (Mechanical) (OP)
5 Oct 10 17:03
The part is a shank for a tillage machine; there will be a large force, 1500lbs about, on the inside of the bend. We haven't seen any of the shanks begin to unbend, but that is our major concern.
Metalguy (Materials)
5 Oct 10 17:31
You should be OK with this.  Does the part run through dirt?  The AR (abrasion resistant) steel were developed to resist dirt/rock sliding, while still being readily weldable.

If you need more strength, there is AR500 available.

"You see, wire telegraph is like a very long cat. You pull his tail in New York and his head is meowing in Los Angeles. Do you understand this? Radio operates the same way: You send signals here, they receive them there. The only difference is there is no cat." A. Einstein  

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