Superior No. 601B/3411 General Purpose Black Brazing Flux is a Boron-modified flux that meets the AMS 3411 specification. It is formulated for applications where temperatures reach 980°C/1800°F, such as saw-blade carbides.
Superior Flux Number
High-temp, black brazing flux paste; boron-modified.
Rec. Base Metals
Ferrous and non-ferrous alloys, stainless and carbide
Rec. Filler Metals
Rec. Temp Ranges
565-980°C / 1050-1800°F
AMS 3411; AWS A5.31-19, Type FB3C; O-F 499, Type B
Superior No. 601B/3411 is a boron-modified, hi-temp silver brazing paste flux that meets AMS 3411 specifications. Whereas the typical silver brazing white flux (see Silver Brazing White Flux Paste) is active to 870°C/1600°F, No. 601B/3411 black brazing flux paste is active to 980°C/1800°F.