Tenacity™ No.3A Flux Paste is a flux that is suitable for use with silver brazing filler metals. It is especially designed for use on heat resistant stainless steels, tungsten carbide and the refractory metals. It has a working range of 600-875°C and is suitable for use with silver brazing filler metals melting below 825°C (such as several of the Silver-flo™, Easy-flo™ and Argo-braze™ range of alloys). Tenacity™ No.3A Flux Paste formerly sold as Mattiflux™ 3A Paste. This flux contains elemental boron making it dark brown in color. It is therefore not always easy to observe the flow of the molten brazing alloy. It is often recommended for use on tungsten carbide components where it helps to provide improved wetting of the brazing alloy. The flux also offers good overheat resistance. Tenacity™ No.3A Flux Paste should not be used on low nickel or nickel-free stainless steels if interfacial corrosion is likely to be a hazard in service. Information provided by Johnson Matthey Metal Joining |