I remember that type of plating, from my Navy days. The shape , if memory serves, was about 3/4 inch long by 1/4 inch wide (could have been 2/3 by 1/3). If the long diamention was verticle, the angles would have been about 30 degrees, to either side.
This plating was used, on the boats, for the deck between the torpedo tubes abd the "draw bridge" in the forward room. As well as the lower flats in the engine rooms.
I haven't seen any drawings, showing it, in my drawings, but I haven't been looking. If I run across one, I'll post it here.
I, also, vaguely remember seeing it for sale, years ago, but I think it was in a larger scale, like 1/35