BRAZING ALLOYS

• US 3,862,838 A
• Filed: 06/05/1973
• Issued: 01/28/1975
• Est. Priority Date: 06/07/1972
• Status: Expired due to Term

• Current Assignee: John Sidney Hatswell, Meczyslaw Herman Sloboda
• Original Assignee: John Sidney Hatswell, Meczyslaw Herman Sloboda
• Inventors: Hatswell, John Sidney, Sloboda, Meczyslaw Herman
• Primary Examiner(s): Rutledge, L. Dewayne
• Assistant Examiner(s): Weise, E. L.
• Application Number:
  US05/367,226
• Time in Patent Office: 602 Days
• Field of Search: 75/173C,134C
• US Class Current: 420/587
• CPC Class Codes: B23K 35/3006 Ag as the principal constituent
• CPC Class Codes: C22C 30/06 containing zinc

Abstract

This invention relates to a silver based brazing alloy containing, apart from impurities, 40-50 percent by weight of silver, 20-33 percent by weight zinc, 12-40 percent by weight copper and optionally 0-5 percent by weight of tin. Brazing alloys which we have found particularly satisfactory are those containing A. 45 percent by weight silver, 25 percent by weight copper and 30 percent by weight zinc. B. 40 percent by weight silver, 30 percent by weight copper and 30 percent by weight zinc. C. 40 percent by weight silver, 30 percent by weight copper, 28 percent by weight zinc and 2 percent by weight tin, and 40 PERCENT BY WEIGHT SILVER, 27 PERCENT BY WEIGHT COPPER AND 33 PERCENT BY WEIGHT ZINC.

Claims

2. An alloy consisting essentially of, apart from impurities, 45 percent by weight silver, 25 percent by weight copper and 30 percent by weight zinc.

3. An alloy consisting essentially of, apart from impurities, 40 percent by weight silver, 30 percent by weight copper and 30 percent by weight zinc.

4. An alloy consisting essentially of, apart from impurities, 40 percent by weight silver, 30 percent by weight copper, 28 percent by weight zinc and 2 percent by weight tin.

5. An alloy consisting essentially of, apart from impurities, 40 percent by weight silver, 27 percent by weight copper and 33 percent by weight zinc.