As　an　alternative　to　the　traditional　nickel-based　filler　metals,　new-type　iron-based　filler　metal　has　become　a　development　trend　for　stainless　steel　brazing　in　exhaust　gas　recirculation　(EGR)　cooler　fabrication,　aiming　at　decreasing　brazing　temperature　and　obtaining　higher　joint　strength　with　minimal　erosion　as　well　as　better　corrosion　resistance.　In　particular,　achieving　the　satisfying　properties　with　inexpensive　raw　materials　is　desirable　for　broad　industrial　applications　at　an　economic　cost.　A　new　type　of　iron-based　filler　metal　was　designed　and　developed　for　SUS304　stainless　steel　brazing.　The　effect　of　B　and　Mo　content　on　interface　microstructure,　lap-joint　shear　strength,　microhardness,　and　corrosion　resistance　of　brazed　seam　was　investigated.　The　optimum　brazing　parameters　were　achieved　at　1050　degrees　C-20min.　Both　brazing　temperature　and　holding　time　are　critical　factors　for　controlling　the　interface　microstructure　and　hence　the　mechanical　properties　of　the　brazed　joints.　The　interface　microstructure　and　erosion　of　T-joints　were　observed　and　analyzed.　Additionally,　results　from　the　evaluation　on　wettability,　shear　strength,　and　corrosion　resistance　have　been　benchmarked　against　commercial　iron-based　and　nickel-based　filler　metals.　Finally,　tensile　strength　tests　of　brazed　joint　with　developed　iron-based　filler　metal　in　a　form　of　paste　and　amorphous　foil　were　conducted　at　both　room　temperature　and　high　temperature.