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

What sizes are available for our Nickel-Aluminium Bronze?

Both bar and forgings are supplied to Def Stan 833 and C63200. Round bar is available from 35 mm to 380 mm in diameter, while flat bar can be supplied up to a 330 mm square equivalent, with a largest width or thickness of 480 mm. Bar lengths go up to 3500 mm.

Forgings include discs up to 600 mm in diameter and rings up to 830 mm in diameter, with a minimum inner diameter of 150 mm. Forged thickness is up to 150 mm, with a maximum weight of 325 kg.

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Product Form	Sub-Type / Feature	Dimensions & Limits
Bar	Diameter	35 mm to 380 mm
	Flats	Up to 330 mm square equivalent (largest width or thickness 480 mm)
	Lengths	Up to 3500 mm
Forgings	Discs	Up to 600 mm diameter
	Rings	Up to 830 mm diameter (minimum inner diameter 150 mm)
	Thickness	Up to 150 mm (325 kg)

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Copper Alloys can differ from these standard dimensions and limitations. Speak with our class-leading team, and learn more about how we can support your next project.

Speak with Our Team

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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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