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Elmet Technologies

Ampco Metal AMPCO® 642 Aluminum-Silicon-Copper Alloy, Hot Extruded (M-30), 3" to 4"
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 PropertiesMetricEnglishComments
Specific Gravity 7.69 g/cc7.69 g/cc
Density 7.70 g/cc0.278 lb/in³
 
Mechanical PropertiesMetricEnglishComments
Hardness, Rockwell B 7878
Tensile Strength, Ultimate 483 MPa70100 psi
Tensile Strength, Yield 207 MPa30000 psi
Elongation at Break 15 %15 %
Modulus of Elasticity 110 GPa16000 ksi
Modulus of Rigidity 41.0 GPa5950 ksi
Poissons Ratio 0.340.34Calculated
 
Electrical PropertiesMetricEnglishComments
Electrical Resistivity 0.0000188 ohm-cm
@Temperature 20.0 °C
0.0000188 ohm-cm
@Temperature 68.0 °F
8% I.A.C.S.
 
Thermal PropertiesMetricEnglishComments
CTE, linear 18.0 µm/m-°C
@Temperature 20.0 °C
10.0 µin/in-°F
@Temperature 68.0 °F
Specific Heat Capacity 0.380 J/g-°C0.0908 BTU/lb-°F
Thermal Conductivity 45.0 W/m-K312 BTU-in/hr-ft²-°F
 
Component Elements PropertiesMetricEnglishComments
Aluminum, Al 7.0 %7.0 %
Copper, Cu 91 %91 %
Silicon, Si 2.0 %2.0 %

Some of the values displayed above may have been converted from their original units and/or rounded in order to display the information in a consistent format. Users requiring more precise data for scientific or engineering calculations can click on the property value to see the original value as well as raw conversions to equivalent units. We advise that you only use the original value or one of its raw conversions in your calculations to minimize rounding error. We also ask that you refer to MatWeb's terms of use regarding this information. Click here to view all the property values for this datasheet as they were originally entered into MatWeb.

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NAMPCO33 / 14987

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