A plurality of parts are brazed using an iron/chromium filler metal. The parts
are preferably composed of stainless steel. The brazed assembly forms a heat exchanger
characterized by good corrosion resistance and low rates of leaching of Ni, which
are further improved by a post-brazing conditioning step in an oxygen-containing
atmosphere at a temperature of about 150 to 600 C. The preferred brazing
filler metal consists essentially of a composition having the formula FeaCrbCocNidMoeWfBgSih
wherein the subscripts are in atom percent and total 100%, "b" is about 5 to 20,
"c" ranges from 0 to about 30, "d" is 0 to about 20, "e" is 0 to about 5, "f" is
0 to about 5, "g" is about 8 to 15, "h" is about 8 to 15, the balance being incidental
impurities of up to about 1 percent by weight of the total composition.
