Coinage alloy and processing for making coinage alloy
AssigneeGovernment of the United States of America, AS Represented By the Secretary of Commerce
InventorsEric A. Lass, Mark R. Stoudt, Carelyn Campbell
Life of this patent
Estimating the term…
Abstract
A coinage alloy for coinage includes nickel present in an amount from 4 wt. % to 11 wt. %, based on a total weight of the coinage alloy; zinc present in an amount from 20 wt. % to 35 wt. %, based on the total weight of the coinage alloy; manganese present in an amount from 3 wt. % to 6 wt. %, based on a total weight of the coinage alloy; copper; an electrical conductivity from 5% International Annealed Copper Standard (IACS) to 6% IACS measured in accordance with ASTM E1004-09 (2009); and a color comprising a yellowness vector b* that is from 6 to 11, based on a CIE L*a*b* color space and determined in accordance with ASTM Standard E308-15 (2015).
Claims26
A coinage alloy for coinage process comprising:
- nickel present in an amount from 5.1 wt. % to 14 wt. %, based on a total weight of the coinage alloy;
- zinc present in an amount from 20 wt. % to 35 wt. %, based on the total weight of the coinage alloy;
- manganese present in an amount from 2.1 wt. % to 3.9 wt. %, based on a total weight of the coinage alloy, such that a combined weight percentage of nickel and manganese is:
- 19 wt. %≤CNi+3 CMn≤23 wt. %, based on the total weight of the coinage alloy, wherein CNi is the amount of Ni, and CMn is the amount of Mn;
- copper;
- an electrical conductivity from 5% International Annealed Copper Standard (IACS) to 6% IACS measured in accordance with ASTM E1004-09 (2009);
- and
- a color comprising a yellowness vector b* that is from 6 to 11 based on a CIE L*a*b* color space and determined in accordance with ASTM Standard E308-15 (2015).
Dependencies are inferred from the claim text.