US2025197971A1PendingUtilityA1

Lead-free brass alloy and machine element produced therefrom

Assignee: DIEHL BRASS SOLUTIONS STIFTUNG & CO KGPriority: Sep 8, 2022Filed: Mar 4, 2025Published: Jun 19, 2025

Est. expirySep 8, 2042(~16.1 yrs left)· nominal 20-yr term from priority

Inventors:Florian Seuss Patrick Feldner Volker Bräutigam Alexander Dehnelt Sven Reimus Miroslava Sakaliyska

C22C 9/04

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Cited by

References

Claims

Abstract

A lead-free brass alloy contains 55 to 59 wt % of Cu, 2.0 to 2.5 wt % of Mn, 0.65 to 1.5 wt % of Si, less than 0.1 wt % of Pb, and a remainder or balance of Zn as well as unavoidable impurities. A machine element which is produced from the lead-free brass alloy is also provided.

Claims

exact text as granted — not AI-modified

1 . A lead-free brass alloy, comprising:
 55 to 59 wt % of Cu;   2.0 to 2.5 wt % of Mn;   0.65 to 1.5 wt % of Si;   &lt;0.1 wt % of Pb; and   a balance Zn and unavoidable impurities.   
     
     
         2 . The lead-free brass alloy according to  claim 1 , wherein a ratio of the weight percentages of Mn to Si corresponds to the following inequation: 
       
         
           
             
               2. 
               ≤ 
               
                 Mn 
                 / 
                 Si 
               
               ≤ 
               
                 2 
                 . 
                 9 
                 . 
               
             
           
         
       
     
     
         3 . The lead-free brass alloy according to  claim 1 , wherein a copper equivalent is between 53% and 66%. 
     
     
         4 . The lead-free brass alloy according to  claim 1 , which further comprises less than 0.2 wt % of Fe. 
     
     
         5 . The lead-free brass alloy according to  claim 1 , which further comprises less than 0.5 wt % of Sn. 
     
     
         6 . The lead-free brass alloy according to  claim 1 , which further comprises 1.5 to 2.6 wt % of Ni. 
     
     
         7 . The lead-free brass alloy according to  claim 1 , which further comprises:
 57 wt % of Cu;   2.3 wt % of Mn;   1.0 wt % of Si;   0.1 wt % of Fe;   0.1 wt % of Sn;   2.0 wt % of Ni;   &lt;0.1 wt % of Pb; and   a balance Zn and unavoidable impurities.   
     
     
         8 . The lead-free brass alloy according to  claim 1 , which further comprises less than 0.1 wt % of Al. 
     
     
         9 . The lead-free brass alloy according to  claim 1 , which further comprises at least one of:
 less than 0.25 wt % of Cr, or   less than 0.25 wt % of Ti, or   less than 0.25 wt % of Co.   
     
     
         10 . A machine element, comprising the lead-free brass alloy according to  claim 1 .

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