Coinage cladding alloy and processing for making coinage cladding alloy

US10513768B2 · 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
• Tsineng Tony Ying · Gaithersburg, US

Key dates

• Filing date: Oct 19, 2016
• Grant date: Dec 24, 2019
• Expiry date: Aug 5, 2037

Classification

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

Abstract

A coinage cladding alloy for coinage includes nickel present in an amount from 5 wt. % to 7 wt. %, based on a total weight of the coinage cladding alloy; zinc present in an amount from 21 wt. % to 29 wt. %, based on the total weight of the coinage cladding alloy; manganese present in an amount from 12 wt. % to 16 wt. %, based on a total weight of the coinage cladding alloy; copper; an electrical conductivity from 2% International Annealed Copper Standard (IACS) to 3% IACS; and a color comprising a yellowness vector b* that is from 2 to 10, based on a CIE L*a*b* color space and determined in accordance with ASTM Standard E308-15 (2015).