US2022119920A1PendingUtilityA1

Lead-free copper alloy and component with the lead-free copper alloy

Assignee: DIEHL METALL STIFTUNG & CO KGPriority: Oct 16, 2020Filed: Oct 14, 2021Published: Apr 21, 2022

Est. expiryOct 16, 2040(~14.2 yrs left)· nominal 20-yr term from priority

Inventors:Norbert Gaag Florian Seuss

C22C 9/04C22F 1/08C21D 1/26

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References

Claims

Abstract

A lead-free copper alloy has from 70.0 to 83.0% by weight of Cu, from 2.0 to 2.9% by weight of Si, from 0.05 to 0.10% by weight of P, from 0.01 to <0.30% by weight of Sn, and a balance of Zn and unavoidable impurities. The lead-free copper alloy is particularly suited for the production of an installation components for conducting drinking water.

Claims

exact text as granted — not AI-modified

1 . A lead-free copper alloy, comprising:
 a content of from 70.0 to 83.0% by weight of Cu;   a content of from 2.0 to 2.9% by weight of Si;   a content of from 0.05 to 0.10% by weight of P;   a content of from 0.01 to &lt;0.30% by weight of Sn; and   balance Zn and unavoidable impurities.   
     
     
         2 . The lead-free alloy according to  claim 1 , wherein the proportion of Cu is from 73.3 to 76.8% by weight. 
     
     
         3 . The lead-free copper alloy according to  claim 1 , which further comprises a content of from 0.01 to &lt;0.1% by weight of Al. 
     
     
         4 . The lead-free copper alloy according to  claim 1 , wherein a proportion of Si is from 2.40 to 2.90% by weight. 
     
     
         5 . The lead-free copper alloy according to  claim 4 , wherein the proportion of Si is from 2.60 to 2.80% by weight. 
     
     
         6 . The lead-free copper alloy according to  claim 4 , wherein the proportion of Si is from 2.60 to 2.78% by weight. 
     
     
         7 . The lead-free copper alloy according to  claim 1 , comprising a proportion of kappa phase of not more than 25% by weight. 
     
     
         8 . The lead-free copper alloy according to  claim 1 , further comprising a content of Al in a proportion of from 0.01 to 0.05% by weight. 
     
     
         9 . The lead-free copper alloy according to  claim 1 , wherein a proportion of P is from 0.08 to 0.10% by weight. 
     
     
         10 . A component, comprising the lead-free copper alloy according to  claim 1 . 
     
     
         11 . The component according to  claim 10 , configured for use in an installation for a mains water sector.

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