Using ISO/ANSI 6 material classification, where does brass fit in?

[jheal2]

Hi, when looking in a tooling book, you have your standard 6 different coloured boxes indicating the type of material being cut. P-Steel M-Stainless Steel K-Cast Iron S-Heat resistant super alloys N-Aluminum H-Hard Part.
I use alot of Copper, Brass and Non ferrous materials and just wondering where this would lump in for cutting data? I believe that it goes with aluminum which is similar hardness, non ferrous etc but I am not 100% sure.

Thanks Jordan