Hexcel® HexPly® M74 Curing Epoxy Matrix

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Hexcel® HexPly® M74 Curing Epoxy Matrix
Categories:	Polymer; Thermoset; Epoxy
Material Notes:	Description: M74 is a high flow, 350°F (177°C) curing epoxy resin with extensive space structural heritage. M74 is formulated for autoclave processing, but it has been successfully processed by press molding. Unidirectional tape and woven fabric impregnated with M74 resin will retain good tack and drape for at least 10 days at 70°F (21°C). Standard cure is for two hours at 350°F (177°C). Hexcel recommended lay-up procedure is HSP-L1 or HSP-L2. Recommended cure procedure is HSP-C1 or HSP-C2. Typical applications for M74 include structural aircraft components and critical space structures. M74 meets all NASA outgassing requirements. Features: 350°F (177°C) cure Available in a broad range of fibers and forms including tape, fabric, and tow Large industry data base Laminate and sandwich panel usage Material widely used in space, aerospace, and military structural applications Autoclave or press-mold processing Shelf life: 6 months at 0°F (-18°C) 10 days at 72°F (22°C) Information provided by Hexcel Corporation.
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Physical Properties	Original Value	Comments

Density	1.30 g/cc
Volatiles	<= 0.0100 %
Outgassing - Total Mass Loss	0.400 %

Mechanical Properties	Original Value	Comments
Tensile Strength	12.0 ksi
Tensile Modulus	600 ksi
Flexural Strength	10.0 ksi @Temperature 93.3 °C	Wet
	10.0 ksi @Temperature 23.9 °C
	17.0 ksi @Temperature 93.3 °C
Flexural Modulus	340 ksi @Temperature 93.3 °C	Wet
	500 ksi @Temperature 93.3 °C
	600 ksi @Temperature 23.9 °C

Thermal Properties	Original Value	Comments
Glass Transition Temp, Tg	160 °C	Wet
	194 °C	Dry

Processing Properties	Original Value	Comments
Shelf Life	0.300 Month @Temperature 22.0 °C
	6.00 Month @Temperature -18.0 °C

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PHEXCB9142 / 322298

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