Ar pre-shaped castables are a fused silica castable refractory inert to liquid aluminium and its alloys. This high strength material offers remarkable resistance to erosion and damage, minisiming the potential for refractory inclusions. These are used in hot-top table sections, transfer troughs, thimbles, launders etc. As well as a wide variety of pre-cast shapes, we can supply in bulk bags for in-situ casting. Typical properties are: Composition Silica 80% Alumina 16% Calcium oxide 4% Cast density 1860-1890 kg/m3 Apparent porosity 20% - 24% Linear change -0.20-0.25% cured at 725C Coefficient of thermal expansion 0.81 x 10-6 mm/mm/deg c at 649C Maximum service temperature 760 C Exceptions: Not recommended for use in continuous casting applications. Full data sheet in english or chinese available on request.