You might want to try your local Sandvik Materials Technology service center:
Sandvik Steel UK
Halesowen
West Midlands
PH:0121-504 5100
(I'm not sure as to the accuracy of the phone # its from the back of a data sheet from 1996. You should be able to go to their site and find the link that will get you to their local (to you) service center.)
nick