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Metal adhesives

Armstrong C-7/W Epoxy Adhesive, 2:3 Mix Ratio
Categories: Polymer; Adhesive; Thermoset; Epoxy; Epoxy Adhesive, Flexible

Material Notes: A clear, unfilled, medium viscosity adhesive recommended for use with any Armstrong Activator. Physical property data included covers C-7 used with Activators W and H-20. All other Activators may also be used to achieve specific characteristics in the completed bond- see appropriate Data Sheet for details. C-7 with Activator W offers maximum versatility in that differing degrees of flexibility can be achieved by varying the mixing ratios within the recommended limits. C-7 with Activator W meets the requirements of Navy Specs. XWS15351 and WS 09125C. C-7, when used with Activator H-20, offers a tough yet rigid bond.

Information provided by Ellsworth Adhesives.

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Physical PropertiesMetricEnglishComments
Viscosity 25000 cP25000 cPMixed
 
Mechanical PropertiesMetricEnglishComments
Hardness, Shore D 6868
Tensile Strength, Ultimate 26.5 MPa3850 psiafter optimum cure
Elongation at Break 21.7 %21.7 %
Adhesive Bond Strength 34.5 MPa5000 psiSteel-Steel; after optimum cure
 1.72 MPa
@Temperature 82.2 °C
250 psi
@Temperature 180 °F
Aluminum-Aluminum tensile shear
 21.0 MPa
@Temperature 25.0 °C
3050 psi
@Temperature 77.0 °F
Aluminum-Aluminum tensile shear
 23.8 MPa
@Temperature -54.4 °C
3450 psi
@Temperature -66.0 °F
Aluminum-Aluminum tensile shear
 
Thermal PropertiesMetricEnglishComments
CTE, linear 13.0 µm/m-°C
@Temperature 20.0 °C
7.22 µin/in-°F
@Temperature 68.0 °F
Glass Transition Temp, Tg 42.0 °C108 °F
 
Processing PropertiesMetricEnglishComments
Processing Temperature 22.2 °C72.0 °F
 93.3 °C200 °FOptimum cure is 15 min. @ 200°F
 149 °C300 °FFast cure is 5 min. @ 300°F
Pot Life <= 90.0 min
@Temperature 25.0 °C
<= 90.0 min
@Temperature 77.0 °F
100 g
 
Descriptive Properties
ColorAmber
Mix Ratio2/3By Weight

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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Metal adhesives

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