Unifrax Fibermax® Duraboard® 18R Board

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Unifrax Fibermax® Duraboard® 18R Board
Categories:	Ceramic; Oxide; Aluminum Oxide
Material Notes:	Duraboard® 1700 and Duraboard® 1800 are an extension to the Fibermax® product line. These board products exhibit excellent thermal stability (low shrinkage) at very high operating temperatures. Another benefit of these board products is their extremely high modulus of rupture (MOR) in both the green and fired state. Because of their strength, both Duraboard 1700 and Duraboard 1800 are very well suited for applications where sag resistance is critical. Duraboard 17R and 18R have a rolled finish, while Duraboard 17H and 18H are compressed during manufacturing for optimum density and sanded smooth. Standard thicknesses available for these products are 13mm, 25mm, 38mm, and 50mm. Typical Applications High-temperature laboratory furnaces/kilns Diffusion Furnaces Kiln setter tiles Specialty shapes Atmosphere furnaces Electric furnaces Information Provided by Unifrax I LLC
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Physical Properties	Original Value	Comments

Density	32.0 lb/ft³	Dry
Loss On Ignition	4.0 % @Temperature 1260 °C, Time 86400 sec

Mechanical Properties	Original Value	Comments
Modulus of Rupture	0.198 ksi	Fired
	0.255 ksi	Green

Thermal Properties	Original Value	Comments
Maximum Service Temperature, Air	1800 °C	Continuous
Shrinkage	0.40 % @Time 86400 sec	Linear

Component Elements Properties	Original Value	Comments
Al2O3	85 %
SiO2	15 %

Descriptive Properties
Appearance	White

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CUNIF088 / 97860

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