Coinage alloy and processing for making coinage alloy

US10378092B2 · kind B2 · utility

Assignee

• Government of the United States of America, as represented by the Secretary of Commerce · US

Inventors

• Eric A. Lass · Montgomery Village, US
• Mark R. Stoudt · Germantown, US
• Carelyn Campbell · Germantown, US

Key dates

• Filing date: Oct 17, 2016
• Grant date: Aug 13, 2019
• Expiry date: Oct 18, 2037

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C22C9/04
• WIPO field: Materials, metallurgy
• WIPO sector: Chemistry

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).