For tips like using a magnet to determine ferrous and non-ferrous materials, that can help recyclers make more money on their metal recycling.
en.wikipedia.org The probe handle, being made of a non-ferrous material, has no disturbing effect on the field.
en.wikipedia.org He made successful attempts at designing a hot pressing machine for non-ferrous metals.
en.wikipedia.org The exchange was created for trading in non-ferrous metals and currently contracts for several non-ferrous metals including copper, aluminum, lead, zinc, tin, and nickel.
en.wikipedia.org Its mission then, as it is now, was to provide must-have timely information, including price indications, for the global non-ferrous metals and steel markets.
en.wikipedia.org