COPPER ALLOY MATERIAL
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United States of America Patent
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Issued Date -
Feb 28, 2019
app pub date -
Oct 11, 2016
filing date -
Nov 9, 2015
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Abstract
A copper alloy material has a composition including: 0.3 mass % or more and less than 0.5 mass % of Cr; 0.01 mass % or more and 0.15 mass % or less of Zr; and a Cu balance including inevitable impurities, wherein an average of crystal grain sizes is in a range of 0.1 mm or more and 2.0 mm or less, and a standard deviation of the crystal grain sizes is 0.6 or less.
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