Token Coinage, Metallurgy, and Measurements of Various Nations
Sizes and weights in Metric system. This information is not complete...
Minimum weight appears to be about 2 grams and few are over 20 grams
Minimum diameter appears to be about 15 mm and max about 30 mm; Thickness varies from 1.5 mm to about 3.0 mm
Coinage metallurgy uses an entire range of metals from plated steel to brass-like alloys of copper plus aluminum with various hardeners that add shine or gloss.
In no particular order:
New Zealand: [link to www.rbnz.govt.nz
Canada: [link to www.coinscan.com
UK copper and copper alloy token manuf: [link to www.copperinfo.co.uk
] (Nordic gold - really?)
US coinage at the bottom of this page: [link to www.coinable.com
Italian Euro: [link to www.attilacoins.com
Euro coinage: [link to www.fleur-de-coin.com
and: [link to www.24carat.co.uk
Old Chinese coinage often included lead from 15% up to 22% with some deviations... there is a word doc.
These coinages were usually about 65 -70% copper plus tin about 8 - 11%
Other notes include that many people have allergies to nickel, and manganese is somewhat toxic.
Copper and silver display bacteriostatic properties.