The Cr MAY slow the patina down A BIT, but we're talking only just about 1 point of Cr. And from what I understand, much if not all of that get's tied up as carbides and is not "free" Cr. Please don't quote me, tho, because there is vanadium and tungsten to tie up the carbon as well! Ken, funny you were asking about edge retention with 1.2519 and sharpening in the field. I totally agree....much prefer a slightly softer steel in the field that responds easier to quick touch-ups, if more often. Was just thinking about all of that earlier today. The Sandvik steels being VERY good at obtaining great edges, that last long, and are easy to touch up. I think 1.2519 would definitely be a bit more difficult to touch up an edge in the field, due to the tungsten carbides and vanadium carbides.