Röhm Acrylite® 249 Acrylic Sheet, Aerospace Grade

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Röhm Acrylite® 249 Acrylic Sheet, Aerospace Grade
Categories:	Polymer; Thermoplastic; Acrylic (PMMA); Acrylic, Cast
Material Notes:	Data provided by CYRO Industries Crosslinked acrylic sheet that is certified to meet or exceed Mil Spec MIL-P-8184E, as a type I, Class 2 material. This spec applies to optical quality acrylic sheet that is superior to conventional acrylic sheet in craze resistance, heat resistance, or water absorption. Information Provided by Evonik CYRO. The former Evonik Methacrylates business has been sold to Röhm (Roehm) GmbH.
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Physical Properties	Metric	English	Comments

Density	1.19 g/cc	0.0430 lb/in³	ASTM D792
Water Absorption	0.13 %	0.13 %	24 hrs, 23°C; ASTM D570

Mechanical Properties	Metric	English	Comments
Tensile Strength, Ultimate	81.0 MPa	11700 psi	ASTM D638
Elongation at Break	4.5 %	4.5 %	ASTM D638

Thermal Properties	Metric	English	Comments
CTE, linear	104 µm/m-°C @Temperature 20.0 °C	57.8 µin/in-°F @Temperature 68.0 °F	ASTM D696
Specific Heat Capacity	1.47 J/g-°C	0.351 BTU/lb-°F	typical of Acrylite® sheet
Thermal Conductivity	0.190 W/m-K	1.32 BTU-in/hr-ft²-°F	typical of Acrylite® sheet
Deflection Temperature at 1.8 MPa (264 psi)	112 °C	234 °F	ASTM D648

Optical Properties	Metric	English	Comments
Haze	0.70 %	0.70 %	Before weathering. ASTM D1003
	1.0 %	1.0 %	After 10 days accelerated weathering. ASTM D1003
Transmission, Visible	92 %	92 %	Before and after 10 accelerated weathering; ASTM D1003

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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