Pyrotek Pyrocast AR PLUS Castable Refractory

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Pyrotek Pyrocast AR PLUS Castable Refractory
Categories:	Ceramic; Oxide; Silicon Oxide
Material Notes:	Pyrocast AR Plus is a fused silica refractory castable inert to molten aluminum and its alloys. Parts cast from Pyrocast AR Plus are heat-treated to ensure that free and combined water are removed. Because Pyrocast AR Plus is lighter than molten aluminum, it floats, minimizing the potential for refractory inclusions. Applications Hot-Top table sections Transfer & stub troughs Launder linings Filter boxes Sheet ingot spouts Control pins Furnace tubes Advantages Thermal shock resistance High erosion resistance High service temperature Smooth cast surface Dimensionally stable Preheating unnecessary Easily cleaned Non-wetting Information provided by Pyrotek.
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Physical Properties	Metric	English	Comments

Density	1.90 - 1.95 g/cc	0.0686 - 0.0704 lb/in³
Open Porosity	20 - 24 %	20 - 24 %

Mechanical Properties	Metric	English	Comments
Modulus of Rupture	0.0100 GPa @Treatment Temp. 725 °C	1.45 ksi @Treatment Temp. 1340 °F
Compressive Strength	34.5 MPa	5000 psi	cured at 725°C

Thermal Properties	Metric	English	Comments
CTE, linear	0.550 µm/m-°C @Temperature 100 - 1000 °C	0.306 µin/in-°F @Temperature 212 - 1830 °F
Thermal Conductivity	0.650 W/m-K @Temperature 400 °C	4.51 BTU-in/hr-ft²-°F @Temperature 752 °F
	0.780 W/m-K @Temperature 550 °C	5.41 BTU-in/hr-ft²-°F @Temperature 1020 °F
	0.870 W/m-K @Temperature 700 °C	6.04 BTU-in/hr-ft²-°F @Temperature 1290 °F
Shrinkage	0.20 - 0.25 % @Temperature 725 °C	0.20 - 0.25 % @Temperature 1340 °F

Processing Properties	Metric	English	Comments
Processing Temperature	780 °C	1440 °F	Not recommended for use in continuous casting applications.

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CPYRO184 / 1901

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