Ampco Metal AMPCO® 642 Aluminum-Silicon-Copper Alloy, Extruded-Drawn-Stress Relieved (HR-50), 1" to 2"

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Ampco Metal AMPCO® 642 Aluminum-Silicon-Copper Alloy, Extruded-Drawn-Stress Relieved (HR-50), 1" to 2"
Categories:	Metal; Nonferrous Metal; Copper Alloy; Bronze
Material Notes:	A wrought aluminum-silicon-copper alloy, Ampco 642 alloy has excellent capacity for hot forming, with a hot forgeability rating of 80 and a machinability rating of 60. Joining, using the brazing and arc welding methods, is only fair. Soldering and oxyacetylene welding are not recommended. Applications: valve seats and stems; marine hardware; pole line hardware; bushings and bearings; cams; bolts and nuts; valve bodies and similar components
Key Words:	ASTM B-150 C64200; Federal QQ-C-465 CA642; Military A-15939A Comp.1; AMS 4634 (thru 3")
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Physical Properties	Original Value	Comments

Specific Gravity	7.69 g/cc
Density	7.70 g/cc

Mechanical Properties	Original Value	Comments
Hardness, Rockwell B	86
Tensile Strength, Ultimate	552 MPa
Tensile Strength, Yield	290 MPa
Elongation at Break	12 %
Modulus of Elasticity	110 GPa
Modulus of Rigidity	41.0 GPa
Poissons Ratio	0.34	Calculated

Electrical Properties	Original Value	Comments
Electrical Resistivity	0.0000188 ohm-cm @Temperature 20.0 °C	8% I.A.C.S.

Thermal Properties	Original Value	Comments
CTE, linear	18.0 µm/m-°C @Temperature 20.0 °C
Specific Heat Capacity	0.380 J/g-°C
Thermal Conductivity	45.0 W/m-K

Component Elements Properties	Original Value	Comments
Aluminum, Al	7.0 %
Copper, Cu	91 %
Silicon, Si	2.0 %

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NAMPCO31 / 14985

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