Silver Braze 50Ni2
Silver Braze 50Ni2 Technical Data
Silver Braze 50Ni2 readily wets nickel and iron base alloys. It is recommended for joining 300 Series stainless steel and will retard interface corrosion in most exposures for which the base metals are suitable. However, for joints on cupro-nickel exposed to salt water at elevated temperatures, zinc-free alloys should be used to avoid joint failure by dezincification. Because this alloy is cadmium-free, it can be safely used on food handling equipment and hospital utensils. The presence of nickel in Silver Braze 50Ni2 aids in the joining of small tungsten carbide inserts in cutting tools. In addition, it offsets joint interface brittleness caused by diffusion of aluminum into the brazing alloy, when joining aluminum-bronze to steel.
Silver Braze 50Ni2 is very fluid at its flow point and will quickly fill long, narrow joints. Because it has the tendency to liquate (separation into low and high melting constituents) when heated slowly, this alloy should be heated quickly through its melting range. Its low flow point will minimize oxidation of the stainless steel during brazing. Flux is normally used.
Properties of Brazed Joints
The properties of a brazed joint are dependent upon numerous factors including base metal properties, joint design, metallurgical interaction between the base metal and the filler metal.
Silver Braze 50Ni2 conforms to American Welding Society (AWS) A5.8/A5.8M BAg-24 and Society of Automotive Engineers (SAE) AMS 4788
Wire, strip, engineered preforms, specialty preforms per customer specification, powder and paste.
- AMS: 4788
- AWS: BAg-24
- Lucas: Silvaloy 505
- PI: Silver Braze 50Ni2
- UNS: P07505
- Brazing Temperature Range High: 1405 F / 763 C
- Brazing Temperature Range Low: 1355 F / 735 C
- Liquidus: 1305 F / 707 C
- Solidus: 1220 F / 660 C
- Ag: 50%
- Zn: 28%
- Cu: 20%
- Ni: 2%
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