ULTRA HIGH STRENGTH COPPER-NICKEL-TIN ALLOYS
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Feb 2, 2017
app pub date -
Oct 11, 2016
filing date -
Mar 14, 2013
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The present disclosure relates to ultra high strength wrought copper-nickel-tin alloys and processes for improving the yield strength of the copper-nickel-tin alloy such that the resulting 0.2% offset yield strength is at least 175 ksi. The alloy includes about 14.5 wt % to about 15.5% nickel, about 7.5 wt % to about 8.5% tin, and the remaining balance is copper. The steps include cold working the copper-nickel-tin alloy wherein the alloy undergoes between 50%-75% plastic deformation. The alloy is heat treated at elevated temperatures between about 740° F. and about 850° F. for a time period of about 3 minutes to 14 minutes.
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