I wouldn't think that would be a concern. Forging it as Bruce suggests isn't any different than rolling the billet at the mill. The primary advantage of the powdered metallurgy process is the even distribution of things like alloying and related carbides, which aren't going to move at that temp. I'd worry about grain growth, but not in that temperature range.I would be concerned that forging would mess up what makes the particle metallurgy stainless good. IIRC, the theory is that they have to use the technique to get alloys that you would not normally be able to get using old fashioned methods and I would worry that forging might "undo" much of what the steel is designed to do. I know that Sean McWilliams use to forge T440V which, IIRC, was the predecessor to CPM S90V, but it was supposedly a real PITA.