Nickel Aluminum Bronze (NAB) is a copper-based alloy containing aluminum (9-12%), nickel (4-6%), iron, and manganese. It offers exceptional resistance to seawater corrosion, cavitation, and biofouling, making it the material of choice for marine propellers, valves, and pump components.

NAB is particularly significant in WAAM applications because:

• Traditional NAB casting has long lead times (often 12-24 months for complex parts)
• WAAM can produce NAB components in weeks rather than years
• AML3D achieved Lloyd's Register certification for WAAM NAB components
• Critical for naval shipbuilding and offshore applications

WAAM-produced NAB has demonstrated mechanical properties meeting or exceeding cast specifications.

• Typical Composition Cu bal, Al 9-11%, Ni 4-6%, Fe 3-5%, Mn 1%
• Tensile Strength (cast) 620-690 MPa
• Yield Strength (cast) 250-280 MPa
• Primary Applications Marine propellers, valves, pumps

• Wire Arc Additive Manufacturing
• ARCEMY

• Copper Development Association - NAB