Quinary silver alloy

• US 4,011,056 A
• Filed: 06/06/1975
• Issued: 03/08/1977
• Est. Priority Date: 06/12/1974
• Status: Expired due to Term

• Current Assignee: Eutectic Corp. (Messer Cutting Systems GmbH)
• Original Assignee: Eutectic Corp. (Messer Cutting Systems GmbH)
• Inventors: Simm, Wolfgang, Wasserman, Rene, Steine, Hans T.
• Primary Examiner(s): Rutledge, L. Dewayne
• Assistant Examiner(s): Weise, E. L.
• Application Number:
  US05/584,406
• Time in Patent Office: 641 Days
• Field of Search: 75/134 N, 75/134 B, 75/134 C, 75/173 C, 29/199
• US Class Current: 428/673
• CPC Class Codes: B23K 35/3006 Ag as the principal constituent
• CPC Class Codes: C22C 30/02 containing copper
• CPC Class Codes: Y10T 428/12896 Ag-base component

Abstract

A quinary silver alloy containing copper, zinc and tin as essential elements and also including effective amounts of silicon, is provided capable of a variety of uses and having particular utility as a solder or brazing alloy, the alloy having the following composition by weight:

35 -- 48% Ag

25 -- 35% Zn

0.5 -- 3.5% Sn

0.01 -- 0.4% Si

0 --1% Ni

0 --1% Pd

0 -- 0.5% P

balance -- essentially Cu.

Claims

1. A quinary Ag-Cu-Zn-Sn-Si alloy having the following composition consisting essentially by weight of about 35 to 48% Ag, about 25 to 35% Zn, about 0.5 to 3.5% Sn, about 0.01 to 0.4% Si, 0 to about 1% Ni, 0 to 1% Pd, 0 to 0.5% P and the balance essentially copper.

2. The alloy of claim 1, wherein Sn ranges from about 1 to 3.5%.

3. The alloy of claim 1, wherein the composition consists essentially by weight of about 38 to 46% Ag, about 26 to 32% Zn, about 1.5 to 3% Sn, about 0.05 to 0.15% Si, 0 to about 0.5% Ni, 0 to about 0.5% Pd, 0 to about 0.05% P and the balance essentially copper.

4. The alloy of claim 1, wherein Si may range from about 0.03% to 0.25%.

5. The alloy of claim 1, wherein P may range from 0 to about 0.1%.

6. As an article of manufacture, a casting made of a quinary Ag-Cu-Zn-Sn-Si alloy consisting essentially by weight of about 35 to 48% Ag, about 25 to 35% Zn, about 0.5 to 3.5% Sn, about 0.01 to 0.4% Si, 0 to about 1% Ni, 0 to 1% Pd, 0 to 0.5% P and the balance essentially copper.

7. The article of manufacture of claim 6, wherein the composition thereof consists essentially by weight of about 38 to 46% Ag, about 26 to 32% Zn, about 1.5 to 3% Sn, about 0.05% to 0.15% Si, 0 to about 0.5% Ni, 0 to about 0.5% Pd, 0 to about 0.05% P and the balance essentially copper.

8. A brazed joint comprising metal parts joined together with a braze alloy consisting essentially by weight of about 35 to 48% Ag, about 25 to 35% Zn, about 0.5 to 3.5% Sn, about 0.01 to 0.4% Si, 0 to about 1% Ni, 0 to 1% Pd, 0 to 0.5% P and the balance essentially copper.

9. The brazed joint of claim 8, wherein the braze has a composition consisting essentially by weight of about 38 to 46% Ag, about 26 to 32% Zn, about 1.5 to 3% Sn, about 0.05 to 0.15% Si, 0 to about 0.5% Ni, 0 to about 0.5% Pd, 0 to about 0.05% P and the balance essentially copper.

10. The brazed joint of claim 8, wherein said joint is a part of food processing equipment.