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Nickel Aluminium Bronze AMS 4881 (UNS C99520)


Technical Data Sheet

Chemical Composition Limits
Weight % Cu Al Cr Co Fe Pb Mn Ni Si Sn Zn
AMS 4881
74.5 min 10.5-11.5 0.05 0.2 4.0-5.5 0.03 1.5 4.2-6.0 0.15 0.25 0.30

Nickel Alumimium Bronze - Solid Bar AMS 4881. The additional heat treating process improves mechanical properties and the strength to weight ratio exceeding the range of typical aluminum bronzes. UNS C99520 is commonly used in applications involving heavy loads abrasion,friction, and deformation at high temperatures. In many cases UNS C99520 can replace UNS C63020 with the advantage of this material being available in tube form, which provides economic cost savings to you the customer.

Typical Mechanical Properties

Material Type

Tensile Strength ksi

Yield Strength ksi Elongation 4D %
AMS 4881 Separately Cast Specimins Sand Cast 125 95 2
AMS 4881 Separately Cast Specimins Centifugally 130 95 3

Physical Properties - AMS 4881 Nickel Aluminium Bronze
Melting Point - Liquidus - 1930 F
Melting Point - Solidus - 1900 F
Density - 0.272 lb/in 3 at 68 F
Specific Gravity - 7.53
Electrical Resistivity - 122.8 ohms-cmil/ft @ 68
Electrical Conductivity - 8.5 %IACS @ 68 F
Thermal Conductivity - 24.2 Btu · ft/(hr · ft2· o F)
Coefficient of Thermal Expansion - 9.0 ·10 -6 per o F (68-572
Specific Heat Capacity - 0.1 Btu/lb/o F at 68 F
Modulus of Elasticity in Tension - 16000 ksi
Magnetic Permeability - 1.2
Machinability Rating - 50

Availability
Nickel Aluminium Bronze
Sizes available: AMS 4881
SOLID BAR 1/2" - 8" diameter
HOLLOW BAR 5/8" - 2 1/2"
For all other stock availability contact Sales.

Specifications

Continuous
ASTM B-505
AMS 4881
SAE J462, J461
Centrifugal
ASTM B-271
DELTA AB29
UNS C95520
Euro Equivalents Designation
CuAl10Fe5Ni5-B | CB333G
Standard
EN 1982 : 1998-11

Typical Uses of 4881 Nickel Aluminium Bronze
Oil & Gas - Rock Bit Bearings, Bushings, & Washers, BOP Parts, Wellhead Components
Aerospace - Landing Gear Bushings and Bearings
Automotive - Bearings, Off-Highway Truck Bushings, Forming Roll,Bearings
Marine - Pump Parts, Bushings
Industrial - Cams, Shafting, Hydraulic Bushings for Earth Moving, Equipment, Valve Balls, Cryogenics, Drill Guide Bushings
Military - Tank Track Bearings, Bushings, Aircraft Components

Services
At Aircraft Materials all stock items can be shipped out within 24 hours, usually within the same day. Even cutting orders for bar or sheet can be processed and dispatched the same day, and for time-critical situations such as AOGs, we have a dedicated AOG service desk ready to help (aog@aircraftmaterials.com).

Thanks to our global logistics network we can source from anywhere in the world in just a few days. We use a range of transport partners to enable us to ship overnight within the U.K. and Europe and provide fast shipping solutions to the rest of the world. If your requirement is urgent we can offer a priority shipping service, but also if time is not so critical we can offer more cost-effective options to ensure you get the best value for money. To find out more about our services click here.

Disclaimer
Every effort is made to ensure that technical specifications are accurate. However, technical specifications included herein should be used as a guideline only. All specifications are subject to change without notice.

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