US2010303667A1PendingUtilityA1

Novel lead-free brass alloy

17
Individually held — no corporate assignee on recordPriority: Mar 9, 2009Filed: Apr 13, 2010Published: Dec 2, 2010
Est. expiryMar 9, 2029(~2.6 yrs left)· nominal 20-yr term from priority
Inventors:Norman M. Lazarus
C22C 9/04
17
PatentIndex Score
0
Cited by
0
References
0
Claims

Abstract

The invention relates to brass alloys that are substantially lead-free. In the alloys of the invention, lead is replaced with tellurium sulfur or blends of tellurium and sulfur resulting in alloys that exhibit excellent machinability and conductivity.

Claims

exact text as granted — not AI-modified
1 . A brass alloy comprising:
 Copper;   Zinc;   Sulfur; and   Lead   wherein lead comprises less than 0.25% of the alloy and the Sulfur comprises from about 0.025% to about 1% of the alloy, and   wherein the alloy has a tensile strength of from about 240 MPa to about 530 MPa, and   wherein the alloy is silicon free.   
     
     
         2 . The alloy of  claim 1  wherein the copper comprises from about 57% to about 98% of the alloy. 
     
     
         3 . The alloy of  claim 1  wherein the zinc comprises from about 2.0% to about 43% of the alloy. 
     
     
         4 . The alloy of  claim 1  further comprising less than about 0.02% phosphorous. 
     
     
         5 . A brass alloy comprising:
 about 57% to about 98% copper;   about 2% to about 43% zinc; and   about 0.025% to about 1.0% sulfur   wherein the alloy has a tensile strength of from about 240 MPa to about 530 MPa, and   wherein the alloy is silicon free.   
     
     
         6 . The alloy of  claim 5  further comprising less than about 0.025% lead. 
     
     
         7 . The alloy of  claim 1  having a yield strength of from about 200 MPa to about 450 MPa. 
     
     
         8 . The alloy of  claim 1  wherein the zinc comprises about 5% of the alloy. 
     
     
         9 . The alloy of  claim 1  wherein the zinc comprises about 10% of the alloy. 
     
     
         10 . The alloy of  claim 1  wherein the zinc comprises about 15% of the alloy. 
     
     
         11 . The alloy of  claim 1  when the zinc comprises about 40% of the alloy. 
     
     
         12 . The alloy of  claim 5  having a lead content of less than about 0.5%. 
     
     
         13 . The alloy of  claim 5  having a lead content of less than about 0.01%. 
     
     
         14 . The alloy of  claim 14  having a yield strength of from about 200 MPa to about 450 MPa. 
     
     
         15 . A brass alloy comprising about 57% to about 98% copper; about 2% to about 43% zinc; and about 0.025% to about 1.0 of a blend of sulfur and tellurium;
 wherein the alloy has a tensile strength of from about 240 MPa to about 530 MPa, and   wherein the alloy is silicon free.

Join the waitlist — get patent alerts

Track US2010303667A1 — get alerts on status changes and closely related new filings.

We store only your email — no account needed. See our privacy policy.