We have to do that due to code restrictions some of the items we weld on are 20 an not many but there are some 40 to 50 in thick after reviewing for several hrs i have for the the acceptance criteria is as follows
197-235 for 4130 in base as well as HAZ so i am looking into the base material...
I am pretty rusty when it comes to writing a PQR and new to sub sea and i need some help
we are trying to qualify a few procedures on overlay and some questions have arose in refrence to the following questions.
When doing hardness surveys are the surveys averaged in a specific manner or does...
I came here for assistance.I apologize for my typing and I also apologize for anything you might not understand,or any thing I may not be explainning to you properly.
I have welded 4130 on many occasions and never had the problems i am currently haveing, with the specifications I am trying to...
I was thinking that if i used a coupon that is around 220 and tempered welded the overlay I may be able to reach what they require does this soud feasible
I am at a loss due to the constraints in their spec.I have met their hardness requirement before but the PWHT was 1225 and they rejected...
quenched 1625 2 hrs water
temper 1250
We have to comply with nace as well as API 6 A
Joules are dictated in their spec for a max heat input and it is 26 joules so I am very limited.
PWHT is dictated as well they define the upper limits as well as the lower limits so i am limited there as well...
24 joules was the average heat input
4 Hrs pwht at 1150 1190 dictated by client
Pre heat was 400 inner pass never reached 600 average was 495
Base material was 1.25
Over lay material consisted of 309/316 over lay
625
Trying to adjust my variables trying to qualify a few procedures
4130 625 overlay base material 4130 hardness readings 233
welding variables
24 jls avg
625 stck
4 hrs PWHT
hardness came back high haz cam in as high as 319
trying to keep them between 220 and 250
Need assistance please
