That is a very common material and has a UNS number of:
K02700
From CASTI Metals Black Book it cross references to the following numbers:
1.0481, DIN P295GH or 17Mn4, UK - BS 1501 Gr. 224, France - NF A 48 & AP, Russia - GOST 14G2.
Hopefully something above will help you procure the material close to where you are.
Charles Hall