ALUMINUM

Aluminium.com -- "the internet marketplace for everything aluminum," now expanded to include other non-ferrous metals. Services include trade negotiation, financing, logistics, sampling, surveying and testing.

The Aluminum Association, Inc. -- aims to "enhance aluminum's position in a world of proliferating materials" and increase its use as the "material of choice."

COPPER-BASE

Copper Development Association -- includes richly linked pages covering 13 different applications areas, ranging from commercial tube to marine to telecom.

FERROUS

American Iron & Steel Institute -- with an outstanding compilation of steel-related links.

Iron Casting Research Institute -- Get the strong points of the most popular of all metals in "Gray Iron-A Unique Engineering Material"

MAGNESIUM

International Magnesium Association -- good set of data on mechanical and physical properties of magnesium.

OTHER

International Titanium Association -- includes a complete buyers guide for everything from alloys to semi-fabricated stock to castings and finished products.

ZINC

American Zinc Association

International Lead Zinc Research Institute - good information on zinc diecasting.