PROBLEM TO BE SOLVED: To provide a copper brazing filler metal that can keep high joining strength even when there is a variation in the surface conditions of a joined face like a green compact and a sintered body.;SOLUTION: The copper brazing filler metal includes Ni in an amount of from 20 or more to 36% or less by mass, Mn in an amount from 19 or more to 30% or less by mass, Fe in an amount of from 0 or more to 16% or less by mass, Si in an amount of from more than 0 (not inclusive) to 2% or less by mass, B in an amount of from 0.1 or more to 0.5% or less by mass, and the balance copper (Cu) with inevitable impurities and/or a modifying element, when the entirety is taken as 100% by mass. Moreover, the copper brazing filler metal exhibits a ratio of the Ni content to the Mn content (i.e., (Ni content)/(Mn content)) that falls in a range of from 1.1 or more to 2 or less when being free from Fe.;COPYRIGHT: (C)2012,JPO&INPIT
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