Iron-based braze filler metal for high-temperature applications

Details Iron-based braze filler metal for high-temperature applications Iron-based braze filler metal for high-temperature applications

C - Chemistry, Metallurgy

22

C

C22C 38/34 (2006.01) B22F 9/08 (2006.01) B23K 1/008 (2006.01) B23K 35/24 (2006.01) C22C 30/00 (2006.01)

Patent

CA 2592240

This invention relates to brazing filler metal compositions that have excellent wettability to nickel/cobalt/iron-based base metals and produce braze joints with high strength and heat/corrosion resistance. The iron-based braze filler metal of the present invention comprises chromium in amounts between about 20 to 35 percent by weight, silicon in amounts between about 3 to 12 percent by weight, and phosphorus in amounts between about 3 to12 percent by weight; the balance being iron. These filler metals are suitable for the manufacture of several different types of heat exchangers and catalytic converters at a significantly lower cost compared to currently known braze filler metal compositions.

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