Evonik ROHACELL® 71 HERO Aircraft Grade Polymethacrylimide (PMI) Foam

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Evonik ROHACELL® 71 HERO Aircraft Grade Polymethacrylimide (PMI) Foam
Categories:	Other Engineering Material; Composite Core Material; Polymer; Thermoset; Polymethacrylimide
Material Notes:	ROHACELL® HERO is produced for composite aircraft structures that are lightweight, durable over their lifetime and less expensive to produce. HERO sandwich cores offer the most weight saving potential of all structural foams. Featuring a closed cell structure, ROHACELL® HERO minimizes added weight by taking up resin only in the cut surface cells –resulting in a lighter finished part weight compared with traditional honeycomb structures. Information provided by Evonik
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Physical Properties	Metric	English	Comments

Density	0.0750 g/cc	0.00271 lb/in³	ISO 845

Mechanical Properties	Metric	English	Comments
Tensile Strength at Break	4.10 MPa	595 psi	ISO 527-2
Elongation at Break	9.5 %	9.5 %	ISO 527-2
Tensile Modulus	0.123 GPa	17.8 ksi	ISO 527-2
Compressive Strength	1.10 MPa	160 psi	ISO 844
Compressive Modulus	0.0480 GPa	6.96 ksi	ISO 844
Shear Modulus	0.0280 GPa	4.06 ksi	ASTM C273
Shear Strength	1.30 MPa	189 psi	7.2% shear strain; ASTM C273

Thermal Properties	Metric	English	Comments
CTE, linear	37.7 µm/m-°C	20.9 µin/in-°F
Glass Transition Temp, Tg	207 °C	405 °F

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PEVONIL307 / 196511

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