Brazing alloy for stainless steel, structure braze-assembled with the brazing alloy, and brazing material for stainless steel
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United States of America Patent
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Aug 12, 2003
Grant Date -
N/A
app pub date -
May 22, 2000
filing date -
Sep 28, 1998
priority date (Note) -
Expired
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Abstract
A brazing alloy according to the present invention has a melting point equivalent to that of a copper brazing filler and is excellent in corrosion- and oxidation-resistance. The brazing alloy consists essentially of Mn, Ni and Cu, and has a composition in terms of weight percentage which, when plotted on a diagram as shown in FIG. 1, falls within a range defined by: the point A (37% Mn, 63% Ni, 0% Cu), the point B (18% Mn, 27% Ni, 55% Cu); the point C (42% Mn, 3% Ni, 55% Cu); the point D (50% Mn, 3% Ni, 47% Cu); and the point E (50% Mn, 50% Ni, 0% Cu), wherein Mn=50% is exclusive. A brazing material according to the present invention comprises: a Mn-based metal layer which is composed of a Mn--Ni alloy or a Mn--Ni--Cu alloy; and a Ni--based metal layer which is composed of Ni, a Ni alloy, or a Ni--Cu alloy, wherein the Mn-based metal layer and the Ni-based metal layer are bonded to each other in a stacked relation, and an average content of each of the essential elements in any cross section perpendicular to the length of the brazing material falls within the composition range of the aforesaid brazing alloy.
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