The steel grade you are searching for is not a stainless steel. We do not have any further information on these grades as they are outside the scope of this service.
You should be able to get information on these grades however from the National Metals Technology Centre, (NAMTEC).
Web site www.namtec.co.uk
Telephone +44(0)1709 722460
e-mail enquiries@namtec.co.uk