Nickel Aluminium Bronze Manufacturer

Stoke-on-Trent, United Kingdom
[email protected]
UK +44 (0) 1782 816888 | US +1 (757) 792 1977

What is nickel aluminium bronze?

Nickel aluminium bronze (NAB) is a family of copper alloys containing approximately 8.5-11% aluminium, 4-6% nickel and 3-5% iron, with small manganese additions. The nickel and iron refine the microstructure and suppress the corrosion-prone phases found in plain aluminium bronze, producing an alloy that performs reliably in seawater for decades.

The alloy is known as nickel aluminum bronze in US specifications such as UNS C63200 and UNS C63000; the material and its intent are identical to the UK and European grades.

Why nickel aluminium bronze is specified

Seawater corrosion resistance

A self-healing aluminium-rich oxide film resists seawater corrosion, erosion and cavitation damage in fast-flowing and turbulent conditions.

High strength and fatigue performance

Tensile strengths from 620 MPa upwards with good ductility and fatigue endurance, allowing thinner, lighter sections than many alternative marine alloys.

Wear and anti-galling behaviour

Excellent resistance to galling and seizure under high contact loads, which is why the alloy dominates bearing, bush and gear applications.

Biofouling immunity and non-sparking

The copper-rich surface deters marine growth, and the alloy is non-sparking, making it suitable for hazardous-area tooling and fittings.

Nickel-Aluminium Bronze specifications we frequently manufacture

Each specification has its own specification page with full chemical and mechanical data, click the buttons below to find out more about each alloy:

DEF STAN 02-833

C63200

C63000

CW307G

Other Nickel-Aluminium Bronze specifications we can supply

Alongside the four main wrought standards, we supply cast and aerospace nickel aluminium bronze specifications. Figures on these pages are typical published values from the Copper Alloys technical datasheets, click on each alloy to find out more:

DEF STAN 02-834

AMS 4881

AMS 4880

DTD 197A / BS B23 / CA104

C63020

C95800

Typical applications for Nickel-Aluminium Bronze

Aerospace Bearings & Wear Parts

Bushes, slide plates, gears, worm wheels and landing gear components, where anti-galling behaviour under high load is required.

Marine & Naval

Propellers, propulsion shafting, rudder components, hull fittings, seawater pipework and submarine valve bodies, where biofouling immunity and seawater corrosion resistance matter most.

Offshore Oil & Gas

Subsea fasteners, manifolds, riser hardware and topside components exposed to salt spray, plus non-sparking tooling for hazardous areas.

Pumps & Valves

Impellers, wear rings, valve bodies, seats and stems handling seawater, brine and other aggressive fluids.

Frequently Asked Questions (FAQs)

What is Nickel-Aluminium Bronze (NAB)?

Nickel aluminium bronze (NAB) is a copper alloy containing roughly 8.5-11% aluminium, 4-6% nickel and 3-5% iron. The nickel and iron additions refine the microstructure and dramatically improve seawater corrosion resistance and strength compared with plain aluminium bronze.

Why is Nickel-Aluminium Bronze specificed for Seawater Service?

The alloy forms a tenacious, self-healing aluminium-rich oxide film that resists seawater corrosion, erosion and cavitation. It is also naturally immune to biofouling, so marine growth does not take hold on exposed surfaces.

Is Nickel-Aluminium Bronze magnetic?

Nickel aluminium bronze has very low magnetic permeability and is treated as effectively non-magnetic for most engineering purposes, which is one reason it is used for minehunter and submarine components.

Discuss your Nickel-Aluminium Bronze Requirements with Our Team

From stocked bar, rod and rings to shaped forgings and fully machined components up to 20,000 kg piece weight, supplied with full traceability. Contact us below to find out more:

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