Ampco Metal AMPCO® 18.22 Aluminum Bronze, Centrifugal

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Ampco Metal AMPCO® 18.22 Aluminum Bronze, Centrifugal
Categories:	Metal; Nonferrous Metal; Copper Alloy; Bronze
Material Notes:	By varying the heat treatment and by close control of all operations, the characteristic duplex structure of AMPCO 18 is refined to produce a material AMPCO 18.22 having substantially higher ultimate strength, yield strength and hardness. Applications: AMPCO 18.22 has been developed to meet the exact requirements of the aircraft industry for an alloy having increased physical properties, hardness and sufficient elongation to withstand important impacts and loads. It is recommended for use as bushings, bearings liners, inserts, piston parts, nuts and slides, etc.
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Physical Properties	Original Value	Comments

Density	7.45 g/cc

Mechanical Properties	Original Value	Comments
Hardness, Brinell	228	HB 30
Hardness, Rockwell B	98
Tensile Strength, Ultimate	793 MPa
Tensile Strength, Yield	407 MPa @Strain 0.5 %
Elongation at Break	10 %
Reduction of Area	8.0 %
Modulus of Elasticity	110 GPa
Compressive Yield Strength	338 MPa	Proportional Limit
	441 MPa	0.1% Perm. Set
Compressive Strength	1069 MPa
Fatigue Strength	248 MPa @# of Cycles 1.00e+8
Shear Strength	427 MPa
Izod Impact	16.3 J
Charpy Impact	11.0 J

Electrical Properties	Original Value	Comments
Electrical Resistivity	0.0000133 ohm-cm	13% I.A.C.S.

Thermal Properties	Original Value	Comments
CTE, linear	16.2 µm/m-°C @Temperature 20.0 °C
Specific Heat Capacity	0.420 J/g-°C
Thermal Conductivity	59.0 W/m-K

Component Elements Properties	Original Value	Comments
Aluminum, Al	10.5 %
Copper, Cu	85.5 - 86 %	As Balance
Iron, Fe	3.5 %
Other, total	<= 0.50 %

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NAMPCO13 / 14967

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