Carbon Steel Material Grade - OX522 D?

[sajk14]

Hello All,

I am looking at a tank that was built in 1973. The tank is 180ft Dia x 74ft High. Design code is API 650 'App D'.

The original drawings show that the shell material is OX522 D and OX522 C?

I am not familiar with this particular grade of steel and am struggling to find any info on it. Has anyone heard of this plate material before and if so what would a modern day equivalent be?

We are looking to carry out a shell insert repair in the bottom shell course and want to make sure we are using a suitable steel replacement.
Thickness of existing bottom course is 1.2 inches.

Thanks

 

[JStephen]

Googling with a space, "OX 522" steel, pulled up this link:

https://books.google.com/books?id=v...wQAQ#v=onepage&q="ox 522" steel plate&f=false

And putting the full "Oxelsund" in there seems to pull up more hits.

 

[sajk14]

Thanks JStephen!