| Joints brazed Johnson Matthey’s Pallabraze alloys have good oxidation resistance and improved mechanical strength at elevated temperatures over standard silver brazing alloys. Pallabraze alloys offer good corrosion resistance in many environments. They show resistance to interfacial corrosion when brazing ferritic and austenitic stainless steels. Palladium-bearing alloys do not cause ‘stress cracking' and are recommended on iron-nickel-cobalt alloys. Pallabrazes have excellent flow and penetration qualities but are also capable of filling joint gaps up to 0.5mm. Typical applications are for brazing thermionic valve devices and aerospace components. Pallabraze alloys have been used in the glass and chemical industries where increased resistance to corrosion and chemical attack makes them a good choice. It can be used to join copper, stainless steel, super alloys, nickel, iron, cobalt, molybdenum, niobium, tungsten and their alloys. Grade V1 is normally used for components that see service in vacuum. Information provided by Johnson Matthey Metal Joining |
