CuAlNi

This welding material deposits nickel aluminum bronze and is well-suited for welding both wrought and cast parent materials with a similar composition. These alloys are recognized for their high strength and exceptional resistance to stress corrosion, cavitation erosion, corrosion fatigue, and attacks by acids and chlorides. Applications for this welding material encompass corrosion-resistant and spark-resistant pumps, ship propellers, and heat exchangers used in offshore, marine, and mining equipment. When working with aluminum bronze alloys, preheating is not required, and the maximum interpass temperature should be limited to 150°C. However, it's worth noting that the resistance to hot cracking in thick sections with high restraint may be inferior to plain aluminum bronze. An alternative approach is to fill with CuAl, a higher ductility aluminum bronze, and then cap with CuAlNi. This strategy helps enhance overall performance, particularly in challenging welding scenarios.

Cu-9%Al-5%Ni bronze for welding similar nickel aluminum bronze alloys.

In the as-welded condition consists of a duplex α + β microstructure.

Joining aluminum bronze. Weld overlay on steels.
EN W.Nr.: 2.0966 (CuAl10Ni5Fe4), 2.0970 (CuAl10Ni3Fe2-C), 2.0978 (CuAl11Ni6Fe5), 2.0980 (CuAl11Fe6Ni6-C).
ASTM: C63200, C63000 (CA630), C95800 (cast), C95500 (cast), C95520 (cast).