BrazeLet^® Ni12DW-9005

The nickel-based brazing alloy BrazeLet BNi12 improved joint strength, corrosion resistance and oxidation resistance compared to the similar BrazeLet BNi7. It is suitable for brazing in vacuum or protective atmospheres (dry hydrogen or argon). It is particularly suitable for brazing deep narrow joints as it maintains the excellent flowability with limited P diffusion into most base materials. It is recommended that gaps do not exceed 50 µm as wider gaps risk the formation of a crack-sensitive brittle centre line. Typical applications for this brazing alloy include industrial heat exchangers and tubular heating elements for drinking water applications.

BrazeLet Ni12DW-9005 is a water-based brazing paste that can be used for dispensing applications, typically found on heat exchanger inlet and outlet tubes, the housings of 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. BrazeLet Ni12DW-9005 sticks on all bevel and vertical positions without the need for pre-drying but is easily removed using water. The binder prevents preoxidation of brazing filler metal powder in marginal furnace atmospheres or in controlled atmosphere brazing with H2, N2/H2 or Ar. This results in a residue-free brazed joint.

The properties of BrazeLet Ni12DW-9005 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 different sized cans for refilling of smaller cartridges for manual applications. For best performance when opening a can from stock, it is always recommended to stir it.