Manufacturer of custom machined parts

Cast C95500

Aluminum bronze is the highest strength standard copper-based alloy. Randall Bearings produces C95400, C95500, AMS 4880-C95510 and C95900 aluminum bronze alloys as standard-stocked products in standard sizes of rounds, tubes and rectangles. Aluminum in conjunction with iron and nickel in C955 acts as a strengthener in these alloys. All of the aluminum bronzes can be heat treated, further increasing tensile strengths.


Product description: Nickel-Aluminum bronze
Solids: 1/2” to 9” O.D.
Tubes: 1 1/8” to 9” O.D.
Rectangles: Up to 15”
Standard lengths: 144”
Shape/Form: semi-finished, mill stock or near-net shapes, anode, bar stock, billet/bloom, squares, hex, plate, profile or structural shape, flats/rectangular bar
Compliance: C95500 is compliant with key legislation including (1) Federal Safe Drinking Water Act 1974 - SDWA, (2) Federal Reduction of Lead in Drinking Water Act 2011 and (3) California AB1953

Typical uses

BUILDERS HARDWARE: window hardware
CONSUMER: musical instruments, piano keys
ELECTRICAL: electrical hardware
Fasteners: stuffing box nuts
Industrial: aircraft components, bearings, bushings, gears, glands, glass molds, handgun recoil mechanisms, hot mill guides, landing gear parts, machine parts, pickling equipment, piston guides, pump fluid ends, sewage treatment applications, valve bodies, valve components, valve guides, valve seats, wear plates, welding jaws, worms, worms wheels
MARINE: covers for marine hardware, marine applications, marine hardware, ship building
ORDNANCE: government fittings

Similar or equivalent specification

C95500B505 B505MJ461 J462QQ-C-390, G3MIL-B-16033, Class 4Aluminum
Bronze 9D

Chemical composition

78.00 min3.00-5.003.00-5.5010.00-11.503.50

Chemical composition according to ASTM B505/B505M-23

¹Ni value includes Co.
Note: Cu + sum of named elements, 99.5% min. Single values represent maximums.


Copper alloy UNS no.Machinability ratingDensity (lb / in³ at 68°F)

Mechanical properties

Tensile strength, minYield strength, at 0.5% extension under load, minElongation, in 2 in. or 50 mm minBrinell hardness (500 kg load)Remarks
ksiMPaksiMPa%typical BHN

Mechanical properties according to ASTM B505/B505M-23

Physical properties

US CustomaryMetric
Melting point - liquidus1930 °F 1054 °C
Melting point - solidus1900 °F 1038 °C
Density0.272 lb/in³ at 68 °F 7.53 gm/cm³ at 20 °C
Specific gravity7.537.53
Electrical conductivity8% IACS at 68 °F 0.049 MegaSiemens/cm at 20 °C
Thermal conductivity24.2 Btu/sq ft/ft hr/°F at 68 °F 41.9 W/m at 20 °C
Coefficient of thermal expansion 68-5729 · 10-6 per °F (68-572 °F)15.5 · 10-6 per °C (20-300 °C)
Specific heat capacity0.1 Btu/lb/°F at 68 °F419 J/kg at 20 °C
Modulus of elastic in tension16000 ksi110000 MPa
Magnetic permeability*1.321.32
Magnetic permeability**1.21.2
Poisson's Ratio0.320.32

*As cast, field strength 16 kA/m **TQ50 temper, field strength 16 kA/m

Fabrication properties

Oxyacetylene weldingNot recommended
Gas shielded arc weldingGood
Coated metal arc weldingGood
Machinability rating50

Thermal properties

Stress relief600
Solution treatment160016751Water

Thermal properties provided by CDA

*Temperature is measured in Fahrenheit. **For stress relief, solution treatment and annealing - time is measured in hours/inch of thickness. For precipitation heat treatment - time is measured in hours.

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