BrazeLet® Ni1ADW-9007

Nickel-based brazing alloy

The nickel-based brazing alloy BrazeLet BNi1A provides high strength joints with excellent oxidation resistance suitable for brazing stainless steels and nickel-based superalloys. It is suitable for brazing in vacuum or protective atmospheres (dry hydrogen or argon). The alloy is similar to BrazeLet BNi1, but has low carbon content. Joint properties can be further improved by employing a diffusion hold after brazing.  The brazing alloy is typically used for joining parts subjected to high stresses and temperatures such as turbine components and diamond tools.

The water-based brazing paste BrazeLet Ni1ADW-9007 can be used for dispensing applications, typically found on heat exchanger inlet and outlet tubes, housing to core joints and hole plates to tube joints. It dries quickly and sticks to all bevel and vertical positions without the need of pre-drying. It can be easily removed with water. The paste has a very low polymer content and the binder is specially designed to decompose cleanly at low temperatures, as to minimise need for furnace maintenance, while preventing pre-oxidation of brazing filler metal powder in marginal furnace atmospheres. It shows extremely good residue-free brazing results in both vacuum and continuous belt furnace brazing.

BrazeLet Ni1ADW-9007 properties allow reliable application in a wide speed range as a result of the dispensing equipment / automatisation as well as the needle diameter. The paste can be delivered in cartridges for use in automated applications or different sized cans. It can be frozen and brought back to room temperature for use without any damage to its properties.

     
 

Nominal composition: Ni – 14Cr – 4.5Si – 4.5Fe – 3.2B
Powder type: Gas atomised
Melting range: 980 – 1080 °C
Minimum brazing temperature: 1175 °C
Recommended gap clearance: 50 – 150 µm
Applicable specifications: AMS4776, ISO 17672 Ni610, AWS A5.8M/A5.8 BNi-1a, ISO 3677 B-Ni74CrFeSiB-980/1080

Solvent type: Water
Metal content: 90 wt%
Particle size: <106 µm
Recommended drying temperature: RT – 170 °C (RT – 340 °F)
Evaporation temperature of binder: 250 – 300 °C (480 – 570 °F)
Typical Brookfield viscosity (2.5 rpm @ 20 °C): 1000 Pas (T-spindle E)
Typical density: 4.5 g/cm3

 
     

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