AMS4881 Specifications & Applications

Stoke-on-Trent, United Kingdom
[email protected]
UK +44 (0) 1782 816888 | US +1 17577921977

AMS4881 Overview

A cast American nickel-aluminium bronze with the unique combined properties of very high strength, good fatigue, excellent corrosion resistance and wear properties, which makes AMS 4881 a popular choice for aerospace applications.

AMS 4881 has very high anti-galling properties when running against most grades of steels and is used universally 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 copper beryllium for high load applications. AMS 4881 is Beryllium-free so 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.

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AMS4881 Equivalent Specifications

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

European

CuAl11Ni6Fe5
CuAl11Ni5Fe5

Key features of AMS4881

Excellent wear resistance and anti-galling properties (against steels and itself) make this alloy ideal for landing gear bushes and bearings in the aerospace industry.

AMS 4881 also has very high strength so has been proven to last for decades.

Applications of AMS4881

AMS4881 is particularly suited to relatively low frequency, high load heavy-duty bearing applications, such as:

Aerospace

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
Tank track bearings

Marine

Pump parts
Hinge bearings and bushes

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Typical Mechanical Properties

Form *	Size Range		Yield 0.2%		UTS		Elong %

Form *	Imperial	Metric	MPa	Ksi	MPa	Ksi	%
Continuous cast	All sizes	91-105	621	90	860	124	2

*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

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.
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.
Tailored and customised properties (physical and mechanical) beyond those of the specification to meet special requirements

Joining

Recommended Welding Processes

Tungsten inert gas (TIG) or gas tungsten arc(GTAW)
Metal inert gas (MIG) or gas metal arc (GMAW)
Manual arc (MMA)
Friction welding
Laser welding
Soldering or oxy-acetylene (not recommended)

Frequently Asked Questions

What are the typical applications of AMS4881 alloy?

Due to its high strength, excellent wear resistance and anti-galling properties, AMS 4881 is particularly suited for producing landing gear bushes and bearings for the aerospace industry.

Can AMS4881 be welded?

Yes, it can be welded using TIG, GTAW, MIG, GMAW, MMA, friction and laser welding techniques. It is not recommended to solder or oxy-acetylene weld AMS 4881.

Where can I buy AMS4881 metal alloy?

You can order AMS 4881 in various formats from us at Copper Alloys. Simply get in touch to discuss your requirements with our metallurgists.

Copper Alloys can 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’ technical team on +44 (0) 1782-816888, or email us.

Contact the technical team

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 temperature, product and product dimensions. The information is based on our present knowledge and is given in good faith. However, no liability will be accepted 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.