If you can't find it on the net, go to the horses mouth. I emailed a request to Rock Creek USA for info on their HWS-1K steel. It is proprietary, but this is what they said.
Thank you for your interest in our Rock Creek knives. Although we don't know its exact composition, HWS-1K is a dedicated forging steel that combines high strength with good edge-holding and ease of sharpening in knife blades. It is not stainless but has a relatively high level of stain resistance, similar to D2 but much better than plain high-carbon steels. The steel hardens to 59~61HRc but is not difficult to sharpen and takes a good edge. We don't have any reviews specific to the Springbok but an article reviewing knives in the same series (with the same blade steel) can be found in this link below.
Looking further is found this article on www.woodsmonkey.com
CAS-Hanwei's Rock Creek Knives is on page 8 in their review section.
Looks like both reviewers put the knives through their paces.
Guess after enough digging I found what I wanted to know. Thought some of you might be interested.
Killbuck, did you have any luck?