Chemical properties of Non-Ferrous

I'm putting together a training class and making signs to label my bins of Non-ferrous commodities. I am looking for a good site, or any information that anyone would be willing to post and share of the "Ingredients" that make up NF commodities. Example is this:

RB (Red Brass)

85% copper 5% zinc

Now I know that the percentages are different this is just an example of what I want it to look like. This way they get to know why a certain commodity pays more then others, based on its "Ingredients".

Thoughts, ideas are always welcome.
Thanks!