MT of A514

By hogan

Date 12-18-2007 17:38

i would think so.

By Taintedhalo (*)

Date 12-21-2007 15:18

I would strongly suggest doing it 48 hours after welding and heat treatment. Then you can catch it before sending it out, save you alot of head aches. And don't forget to do the root on that stuff you would be amazed how they will travel thru.

By GRoberts (***)

Date 12-22-2007 06:30

The reason you need to wait 48 hours after welding is that hydrogen cracking - often called delayed cracking- can take a while to develop. The type of cracking experienced in A514 due to PWHT is reheat cracking. It normally occurs in the HAZ during the heating cycle of the PWHT. No inspection delay is required. Since the code doesn't say that a 48 hour wait after PWHT is required, and the cracking that PWHT causes doesn't have an incubation cycle, the wait is not necessary. However, always think twice before PWHT of A514. Not that it can't ever be done sucessfully, but it can lead to cracking, harm the properties of the weldment, and is hardly ever recommended.