A514 from one supplier to another = problems!
A514 from one supplier to another = problems!
(OP)
We have ran into an interesting problem in regards to A514 material. The pieces are 13.5" diameter discs of 3/4" thickness, the are machined down to a slim profile of about .188". The finished piece almost looks like a bowl.
Anyhow from one supplier we get very little movement after machining, from another supplier less than 20% are good due to spring back.
When comparing the mill certs, of course they both say that they meet A514, strength wise and chemically.
The piece that does not spring back has a slightly lower tensile strength at 115ksi. While the other plate with the problem has a tensile of 129ksi.
Other than that the are only minor differences in the chemical compositions.
Any ideas why this could be? and how to prevent it in the futre?
Anyhow from one supplier we get very little movement after machining, from another supplier less than 20% are good due to spring back.
When comparing the mill certs, of course they both say that they meet A514, strength wise and chemically.
The piece that does not spring back has a slightly lower tensile strength at 115ksi. While the other plate with the problem has a tensile of 129ksi.
Other than that the are only minor differences in the chemical compositions.
Any ideas why this could be? and how to prevent it in the futre?





RE: A514 from one supplier to another = problems!
RE: A514 from one supplier to another = problems!
RE: A514 from one supplier to another = problems!
The disc are cut from 3/4" plate. Would flame cut or plasma cut change the stresses?
RE: A514 from one supplier to another = problems!
RE: A514 from one supplier to another = problems!
RE: A514 from one supplier to another = problems!
RE: A514 from one supplier to another = problems!
RE: A514 from one supplier to another = problems!
- As it turns out the machining was changed in an effort to reduce cycle time. This definitly could be causing this problem.
- The one vendor that supplier the "good" plates plasma cut them. Waiting on the other vendor.
Swall, the part is to be flat.
Brimstoner, being the A514 would arrive in an heat treated condition, once annealed I would have to heat treat again.
Thanks a bunch everyone.