IP Library › Granted Patent US 12662720
Granted Patent B2
US 12662720 · App. 18/431,083 · Granted Jun 23, 2026

Copper alloy, semifinished product and electrical connecting element comprising a copper alloy

Inventors: Patrick Schober (Heidenheim a.d. Brenz, DE); Julia Heilemann (Ulm, DE); Timo Allmendinger (Blaustein, DE); Matthias Nöhrer (Eisenstadt, AT)
Assignee: WIELAND-WERKE AG
C22C9/02
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Quick Facts
Patent No.
US 12662720
App. No.
18/431,083
Granted
Jun 23, 2026
Kind
B2
Abstract

The composition of a copper alloy is as follows: Sn: 3.0-6.5%; Ni: 0.30-0.70%; P: 0.15-0.40%; S: 0.10-0.40%; Zn: optionally up to 0.20%; Fe: optionally up to 0.50%; Mn: optionally up to 0.50%; Pb: optionally up to 0.25%, with the balance being copper and unavoidable impurities. The ratio of fraction of Ni to fraction of P is at least 1.1 and at most 2.8, and the alloy include nickel phosphides.

Claims (30)

1 . A copper alloy having a composition consisting of:

Sn: 3.0-6.5% by weight,

Ni: 0.30-0.70% by weight,

P: 0.15-0.40% by weight,

S: 0.10-0.40% by weight,

Zn: optionally up to 0.20% by weight,

Fe: optionally up to 0.50% by weight,

Mn: optionally up to 0.50% by weight,

Pb: optionally up to 0.25% by weight,

the balance being copper and unavoidable impurities,

wherein the ratio of fraction of Ni to fraction of P is at least 1.1 and at most 2.8 and wherein the alloy comprises nickel phosphides.

2 . The copper alloy according to claim 1 , wherein the ratio of fraction of P to fraction of S is at least 0.70.

3 . The copper alloy according to claim 1 , wherein the ratio of fraction of Ni to fraction of Fe is at least 1.8.

4 . The copper alloy according to claim 1 , wherein the Sn fraction is 4.0% to 5.5% by weight.

5 . The copper alloy according to claim 1 , wherein the Ni fraction is 0.35% to 0.65% by weight.

6 . The copper alloy according to claim 1 , wherein the P fraction is 0.20% to 0.35% by weight.

7 . The copper alloy according to claim 1 , wherein the S fraction is 0.15% to 0.35% by weight.

8 . A semifinished product in wire or rod form comprising a copper alloy according to claim 1 .

9 . An electrical connecting element comprising a copper alloy according to claim 1 .

10 . The copper alloy according to claim 2 , wherein the ratio of fraction of Ni to fraction of Fe is at least 1.8.

11 . The copper alloy according to claim 2 , wherein the Sn fraction is 4.0% to 5.5% by weight.

12 . The copper alloy according to claim 3 , wherein the Sn fraction is 4.0% to 5.5% by weight.

13 . The copper alloy according to claim 2 , wherein the Ni fraction is 0.35% to 0.65% by weight.

14 . The copper alloy according to claim 3 , wherein the Ni fraction is 0.35% to 0.65% by weight.

15 . The copper alloy according to claim 4 , wherein the Ni fraction is 0.35% to 0.65% by weight.

16 . The copper alloy according to claim 2 , wherein the P fraction is 0.20% to 0.35% by weight.

17 . The copper alloy according to claim 3 , wherein the P fraction is 0.20% to 0.35% by weight.

18 . The copper alloy according to claim 4 , wherein the P fraction is 0.20% to 0.35% by weight.

19 . The copper alloy according to claim 5 , wherein the P fraction is 0.20% to 0.35% by weight.

20 . The copper alloy according to claim 2 , wherein the S fraction is 0.15% to 0.35% by weight.