Pyrotek Pyrocast AR Castable Refractory

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Pyrotek Pyrocast AR Castable Refractory
Categories:	Ceramic; Oxide; Silicon Oxide
Material Notes:	Pyrocast AR is a fused silica castable refractory inert to liquid aluminum and its alloys. It is a high strength material offering resistance to erosion and mechanical damage. Parts cast from Pyrocast AR are heat-treated to ensure free and combined water are removed. Pyrocast AR floats in aluminum, 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 Dimensionally stable Thermal shock resistant Easily cleaned Extremely durable Smooth cast surface Preheating unnecessary Non-wetting Information provided by Pyrotek.
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Physical Properties	Original Value	Comments

Density	1.86 - 1.89 g/cc
Open Porosity	20 - 24 %

Mechanical Properties	Original Value	Comments
Modulus of Rupture	0.00690 GPa @Treatment Temp. 649 °C
	0.0103 GPa @Treatment Temp. 815 °C
Flexural Strength	9.00 MPa
Compressive Strength	41.4 MPa	cured at 649°C

Thermal Properties	Original Value	Comments
CTE, linear	0.810 µm/m-°C @Temperature 649 °C
Thermal Conductivity	0.590 W/m-K @Temperature 400 °C
	0.710 W/m-K @Temperature 550 °C
	0.820 W/m-K @Temperature 700 °C
Shrinkage	0.20 - 0.25 % @Treatment Temp. 725 °C

Processing Properties	Original Value	Comments
Processing Temperature	760 °C	Not recommended for use in continuous casting applications.

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CPYRO000 / 1762

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