Key Features

Equivalent Specifications

US
AMS 4881
UNS C95520
ASTM B 505 C95520HT
ASTM B 271 C95520
SAE J462, J461

European
CuAl11Ni6Fe5
CuAl11Ni5Fe5

Applications

AMS4880 is particularly suited to relatively low frequency, high load heavy-duty bearing applications.

Aerospace
Typical applications for AMS 4881 nickel-aluminium bronze material include bushes and bearings for landing gears. Retractable spherical bearings for landing gear assemblies.

Oil and Gas
Rock bit bearings, well head components, bushes & washers

Automotive & Industrial Equipment
Bearings, off-road truck bushings, hydraulic bushes for earth moving equipment, tube forming tools, cryogenic applications, drill guide bushes.

Military
Aircraft bearings and bushes and tank track bearings.

Marine
Pump parts, hinge bearings and bushes.

Tel +44 (0) 1782-816888  
Email sales@copperalloys.net
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AMS4881

Nickel Aluminum Bronze
CuAl11Ni5Fe5

A cast American nickel aluminium bronze where its unique combined properties of very high strength, good fatigue, excellent corrosion resistance, and wear properties makes it a popular choice for aerospace applications.

AMS 4881 has very high anti-galling properties when running against most grades of steels and is used on a world basis for aerospace landing gear bushes and bearings where its strength, fatigue, wear properties, shock resistance and corrosion resistance are well proven over many decades.

This is one of the highest strength aluminium bronzes available and is a realistic alternative to CuBe for high load applications. AMS 4881 is also Beryllium-free and therefore there are no environmental or health and safety issues associated with its use.

This specification allows for sand castings, centrifugal and continuous casting, with continuous casting presenting the optimal combination of reliability, quality and efficiency.

Composition

ElementCu Al Ni+Co Fe Mn* Zn* Sn* Co* Si* Cr* Pb* Imp*
%Bal 10.5-11.5 4.2-6.0 4.0-5.5 1.5 0.3 0.25 0.2 0.15 0.05 0.03 0.2

* Maximum

Typical Mechanical Properties

Form *Size Range Yield 0.5% UTS Elong %
Imperial Metric MPa Ksi MPa Ksi %
Continuous cast All sizes 91-105 630-725 129-135 890-930 4-6 3-8

*Quench hardened 1600°-1700°F (871-927°C) and tempered annealed 925-1000°F (496-538°C)

Copper Alloys Manufacturing Ranges

Available in turnkey finish machined components and raw material as tube up to 500mm/20" diameter and solid bars.

Copper Alloys Ltd also offers finished machined components in all alloys, complete project management and tailored mechanical properties beyond those of the specification to meet special requirements.

All information is supplied for guidance only and gives no guarantee for end applications.

Typical Physical Properties

Density 0.272lb/³ @ 68º F 7528 kg/m³ @ 20ºC
Specific Gravity 7.53 7.53
Specific Heat 0.090 Btu/lb º F @68º F 376.7 J/kg ºC @20 ºC
Electrical Conductivity 9% IACS @ 68º F 5.22 m/ Ωmm²
Thermal Conductivity 22.6 Btu.ft(hr.ft² º F) @68º F 0.391W/cm ºC @20 ºC
Thermal Expansion 9.0 x10ˉ 6 per º F (68-572 º F ) 15.5 x10ˉ 6 perºC (20-300 ºC)
Electrical Resistivity 115Ω-cmil/ft @ 68º F 19.1µ Ω-cm@20 ºC
Relative Magnetic Permeability 1.25µ
Machining Index 20 (Based on free machining brass 100%)
Modulus of Rigidity 6015ksi 41 GPa
Modulus of Elasticity 16000ksi 110 GPa
Melting Range 1900-1930 ºF 1038-1054ºC
Cryogenic Retains properties down to – 321 ºF (-196 ºC)
Elevated Temperatures Retains properties to 662 ºF (350 ºC)

Optimised material production

  1. Precision Machining - - Copper Alloys Ltd. has a deep understanding of machining in all of its alloys. Buying components direct from the material producer will be cost effective and risk-free for the customer.
  2. Project management is available for full ranges of kit and components. Harnessing the Copper Alloys quality management system guarantees delivery on-time and in full.
  3. Tailored and customised properties (physical and mechanical) beyond those of the specification to meet special requirements

Joining

Recommended Welding Processes
  1. Tungsten inert gas (TIG) or gas tungsten arc(GTAW)
  2. Metal inert gas (MIG) or gas metal arc (GMAW)
  3. Manual arc (MMA)
  4. Friction welding
  5. Laser welding
  6. Soldering or oxy-acetylene (not recommended)

Copper Alloys Ltd has the ability to modify existing alloys for improved performance. Many customers have benefited from this in the past.

To discuss your requirements, call a member of Copper Alloys Ltd's technical team on +44 (0) 1782-816888, or email sales@copperalloys.net.

This Data is indicative only and must not be seen as a substitute for the full specification from which it is drawn. In particular, the mechanical property requirements vary widely with tempeter, product and product dimensions. The information is based on our present knowledge and is given in good faith. However, no liability will be acepted by the Company in respect of any action taken by any third party in reliance thereon.

As the products detailed may be used for a wide variety of purposes and as the Company has no control over their use; the Company specifically excludes all conditions or warranties expressed or implied by statute or otherwise as to dimensions, properties and/or fitness for any particular purpose.

Any advice given by the Company to any third party is given for that party's assistance only and without liability on the part of the Company. Any contract between the Company and a customer will be subject to the Company's Conditions of Sale. The extent of the Company's liabilities to any customer is clearly set out in those Conditions, a copy of which is available on request.