BrazeLet® Ni2DW-9201

Nickel-based brazing alloy

The nickel-based brazing alloy BrazeLet BNi2 provides high strength when brazing stainless steel material in vacuum or protective atmospheres (hydrogen or argon). It provides excellent high temperature strength and oxidation resistance. Joint properties can be further improved by employing a diffusion hold after brazing. It is a versatile brazing filler metal used in aerospace, automotive and industrial applications such as heat exchangers and turbines.

The brazing paste BrazeLet Ni2DW-9201 can be used for dispensing applications, typically found on heat exchanger inlet and outlet tubes, housing to core joints and hole plate to tube joints. It can be dispensed by using standard air pressure dispensing units. For better precision, screw dispense units are recommended. The paste sticks on all bevel positions without the need of pre-drying but is easily removed using water. The paste formulation offers the highest metal content of our standard dispensing pastes.

BrazeLet Ni2DW-9201 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 for refilling of smaller cartridges for manual applications. For best performance, it is recommended to first stir the paste.

     
 

Nominal composition: Ni – 7Cr – 4.5Si – 3Fe – 3B
Powder type: Gas atomised
Melting range: 970 – 1000 °C
Minimum brazing temperature: 1050 °C
Recommended gap clearance: 30 – 100 µm
Applicable specifications: AMS4777, ISO 17672 Ni620, AWS A5.8M/A5.8 BNi-2, ISO 3677 B-Ni82CrSiBFe-970/1000

Solvent type: Water-born
Metal content: 92 wt%
Particle size: <106 µm
Recommended drying temperature: 120 – 150 °C (250 – 300 °F)
Evaporation temperature of binder: 300 – 400 °C (570 – 750 °F)
Typical Brookfield viscosity (2.5 rpm @ 20 °C): 1000 Pas (T-spindle E)
Typical density: 4.6 g/cm3

 
     

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