Aluminium Bronze

Products Overview


Available in both wrought and cast product form, Righton Blackburns offers the full scope of product forms, to the majority of international standards, from one of the largest stock ranges available throughout the UK.

Righton Blackburns recognises the demand for unique characteristics of bespoke customer specifications and is able to modify standard aluminium bronze through heat treatment, mechanical and non destructive testing in accordance with the requirements of the naval defence, aerospace, and oil and gas industries.

With a network of nationwide service centres, Righton Blackburns is known for its range of fabrication and processing facilities which include the machining and cutting of aluminium bronze bar.


Aluminium bronzes are the most widely used of all the high performance copper alloys, recognised as a versatile, high strength, corrosion resistant alloy particularly in subsea environments. It is the most tarnish resistant of all the copper alloys and the appearance of the material does not deteriorate when exposed to the effects of atmospheric corrosion.

Used primarily in subsea environments, aluminium bronzes are increasingly being used in a variety of markets including Chemical and petrochemical plants, Power generation (including nuclear), Desalination plants, Aircraft and automotive engineering, marine and Offshore, Building and construction and General engineering.

Aluminum bronzes are used in marine hardware, shafts, propellers, impellers, pump and valve components for handling seawater, and industrial process fluids. They are also used in applications such as heavy duty sleeve bearings, gears, fasteners, bushes and bearings. Aluminum bronze castings have exceptional corrosion resistance, high strength, toughness and wear resistance and good casting and welding characteristics.

Aluminium bronze is also available in bar, sheet, plate, forgings, centrifugally cast rings and continuous cast solid, hollow and sections.

To discover the composition, characteristics, properties and applications of our vast product range, visit our datasheet database.

Aluminium Bronze Grades
DEFSTAN 02-833 (NES 833) BS B23
CW307G C63000

Bronzes are Copper-based alloys with the major alloying element being Tin. They offer a combination of properties such as high strength, hardness, corrosion resistance and wear resistance.

Copper-Aluminium alloys are commonly known as Aluminium Bronzes. These alloys cover a range of Copper-based alloys in which the primary alloying element is up to 14% aluminium.

The four major groups of Aluminium Bronze are:

  • Single phase alloys containing less than 8% Aluminium.
  • Two-phase (duplex) alloys containing 8 to 11% Aluminium. These alloys also frequently have additions of Iron and Nickel to increase strength. This group contains casting alloys AB1 and AB2, the wrought alloys CA105, CA104 and Defence Standard (formerly Naval Engineering Standard NES 747 when cast and the wrought form NES 833).
  • The low magnetic permeability Aluminium-Silicon alloys.
  • The Copper-Manganese-Aluminium alloys with good castability.
DEFSTAN 02-833 (NES 833)

A corrosion resistant material favoured for use in marine and offshore industries for valve components, fasteners and heat exchangers. DEF STAN 02-833 part 2 issue 2 grade 1 aluminium bronze.

Manufactured to the exacting requirements of the Ministry of Defence (MoD), DEFSTAN 02-833 features good ductility, high impact strength, excellent corrosion resistance in seawater and many other aggressive media and high wear and abrasion resistance.

The particular characteristics of DEF STAN 02-833 that enable its impressive physical properties include a nickel content exceeding the iron content in order to achieve good corrosion resistance.

Aluminium Bronze to Defence Standard (NES) 833 is typically used in Marine Valves, Pumps, Weapons handling systems, Couplings, high performance Fasteners, Gears, Marine propeller shafts, Pipe fittings, heat exchangers, wear plates, thrust washers, bearings, bushes, safety tools, worm wheels and gears.

Related DEFSTAN 02-833 specifications include: CA104, CW307G, DGS1043, DGS8452, 2.0966, NF A51-116 and CuAl10Ni5Fe4.

For further information on our range of DEF STAN 02-833 part 2 issue 2 grade 1 aluminium bronze, please contact your local Righton Blackburns Service Centre

BS B23

A wrought version of the 10/5/5 aluminium bronze BS B23 is used when the commercial CA104 is deemed not fit for purpose. BS B23 is mainly used in aerospace engineering but is also used in the marine and chemical sectors due to its high strength and excellent resistance to corrosion and erosion in seawater and other aggressive environments. BS B23 is also known for its excellent shock and wear resistance whilst being able to retain its properties at cryogenic temperatures.

Typical applications include: Aerospace Components, Marine hardware, Thrust washers, Worm gears, High strength fasteners, Heavy duty bushes & bearings, Pump & Valve components and Engine components.

Related specifications: C63000, C63020, CW307G, BS B23, BS 2B23, DTD197A, AIR9070 UA, BS2874, EN 12163, ASTM B150, 2.0966, CuAl10Ni5Fe4, CuAl9Ni5Fe3 (FR) and CuAl9Ni5Fe4 (FR)

For further information on our range of BS B23 aluminium bronze, please contact your local Righton Blackburns Service Centre


CW307G Nickel Aluminium Bronze offers high strength, hardness, and an excellent resistance to wear, shock and abrasion. The addition of nickel increases the alloys strength without diminishing its excellent ductility, toughness and corrosion resistance.

CW307G (AMS 4640) Nickel Aluminum Bronze alloy is an excellent choice for applications involving heavy loads, abrasive wear resistant, friction, abrasive wear and corrosion. Typical Uses for CW307G Nickel Aluminum Bronze include:

INDUSTRIAL: Hydraulic Bushings for Earth Moving Equipment, Corrosion Resistant Articles, Bushings, Bearings, Heat Exchanger Flanges, Heat Exchanger Headers, Tanks, Valve Balls, Structural Members, Pump Shafts, Aircraft Parts, Valve Guides, Plunger Tips, Welded Piping Systems, Balls, Gears, Cams, Pump Parts, Shafting, Condenser Tube for Power Stations and Desalting Units, Valve Seats

MARINE: Pump Parts, Bolts, Nuts, Propellers, Ship Propellers

Related specifications include: BS2874: CA104, BSEN12163: CW307G, BSB23 / BS 2B23, ASTM B150: C63200, DTD197A and ISO CuAl10Ni5Fe4

For further information on our range of CW307G, please contact your local Righton Blackburns Service Centre


C63000/AMS 4640 is the most popular American grade of nickel aluminum bronze and was developed to become an aerospace material under the AMS4640 specification. With a chemical composition of approximately 10% aluminium, 5% nickel and 3% iron, it offers high strength, hardness and a very good corrosion resistance, as well as toughness and an excellent resistance to wear, shock and abrasion. Another major benefit of this alloy is its ability to offer a high retention of its mechanical properties at elevated temperatures. C63000 / AMS 4640 is readily hot worked and offers a good machinability.

Typical applications include: Aerospace landing gear components, Gears, Worm Wheels, Marine fasteners , hardware and fittings, Thrust washers, Springs, Wear plates, non sparking Safety tools, alve stems and seats, wear plates, welding clamps, valve spindles and components, fasteners and bearing bushes

Related Specifications of C63000/AMS 4640 include: CA104, CA105, C63020, CW307G, ASTM B150, BSEN 12163, BS2874, BS2875, 2.0966, NF A51-116, NF L14-705, CuAl10Ni5Fe4, CuAl9Ni5Fe3 (FR), CuAl9Ni5Fe4 (FR)

For further information on our range of C63000, please contact your local Righton Blackburns Service Centre


C63200 offers superior salt water corrosion resistance and is resistant to cavitation and erosion. Quenched and tempered to eliminate the possibility of corrosion C63200 is commonly used in the building of nuclear submarines as well as surface ships. A non-sparking alloy, C63200 can also be used in explosive environments so therefore is ideal for the petrochemical, mining and weapon handling industries. Displaying good strength and toughness,C63200 performing well at both low and elevated temperatures. Easily welded and with good resistance to shock, C63200 alloy has low magnetic permeability making it ideal for use on instrumentation systems, seawater piping systems and marine propulsion units.

Typical Applications include: Valve assemblies, Marine fasteners, Drive shafts, Bearing cages, Sea water pump bodies, Bushes, Weapons handling equipment, Sleeve bearings, fasteners, seawater nuts & bolts

Related specifications include: QQ-C-465, ASTM-B-150, ASTM-B-124, MIL-B-24059, UNS# C63200

For further information on our range of C63200, please contact your local Righton Blackburns Service Centre

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