| Argo-braze™ 56 is a specialized silver-copper-indium-nickel brazing filler metal. It is used principally for brazing stainless steel joints or joints between stainless steel and another parent material that in service will be subject to attack by interfacial corrosion, commonly called crevice corrosion. Argo-braze™ 56 has a long melting range (600 - 711°C), flows relatively poorly when molten, is useful as a gap filling alloy and produces large fillets. It is, however, prone to liquate (separate into low and high melting constituents) if it is heated slowly through its melting range. For this reason rapid heating methods should be employed wherever possible. Typical joint gaps at brazing temperature should be 0.1-0.2mm. Argo-braze™ 56 is used principally for brazing joints involving a stainless steel member in conditions where interfacial corrosion is liable to be a service hazard. It has been found to offer near complete protection from interfacial corrosion on 300 series austenitic stainless steels, while offering a very high level of protection on the martensitic 403,410, 440A grades and the ferritic 430 grade. Information provided by Johnson Matthey Metal Joining |
