Stress Relief of A572 Gr 50 Steel Beam Structure Member
Stress Relief of A572 Gr 50 Steel Beam Structure Member
(OP)
I have a question regarding a current project of fabricating a BOP Trolley Beam that was welded. The Material is A573 GR 50. Problem is, these beams have had a lot of weld repairs, and also has been heat straighten on multiple occasions. the heat used for the straighten was no more than 600 degrees, Also there were cement weights placed on the beams until such time the heat was at room temperature. My question is would there be a need to perform a Stress Relief on these Trolley Beams due to the amount of times it has been heat straighten? The welding process used to weld the Trolley beams was a FCAW process, and it itself it a hot process... There was also numerous Weld repairs performed using the same FCAW Weld Procedure. We have not performed a harness on these beams as of yet, we are just trying to get the fabricator to pursue the Stress Relief.
Therefore my question again is; is there a need to perform the stress relief, if so, what code or standard would direct me to do this.
We will also have the fabricator perform a PQR with adding the stress relief process if needed... but first I need to understand if the Stress Relief is valid to perform.
Thank you
ODOPTU
Therefore my question again is; is there a need to perform the stress relief, if so, what code or standard would direct me to do this.
We will also have the fabricator perform a PQR with adding the stress relief process if needed... but first I need to understand if the Stress Relief is valid to perform.
Thank you
ODOPTU





RE: Stress Relief of A572 Gr 50 Steel Beam Structure Member
Have you done surface NDT on the trolley beams to at least ensure no cracks from previous weld repairs and straightening? If not, I would at least do the surface NDT in areas where previous weld repairs were performed.
RE: Stress Relief of A572 Gr 50 Steel Beam Structure Member
RE: Stress Relief of A572 Gr 50 Steel Beam Structure Member
RE: Stress Relief of A572 Gr 50 Steel Beam Structure Member
Again, why are you so concerned with stress relief? If you heat the beam to 1150 deg F, which is typical PWHT temperature for carbon steel or carbon low alloy, it will distort and you will be back to heat straightening.
RE: Stress Relief of A572 Gr 50 Steel Beam Structure Member
And you gave me all the information I need... Thank you Sir...
ODOPTU
RE: Stress Relief of A572 Gr 50 Steel Beam Structure Member
Best regards - Al