Always Buying Scrap has provided the following page to assist people wanting to pre-sort their scrap metal or wanting to know what kinds of categories of scrap metal there are.
50 % Insulated Wire
70% Insulated Wire
Bare Bright Copper Wire
Brass
BX Cable
Low Grade Electrical Motors
Low-Grade Circuit Boards
Clean Stainless Steel
Dirty Stainless Steel
Irony Aluminum
Romex Wire
Stripping Cable