Size of sialon thermocouple protection tube

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Sialon thermocouple protection tube is allowing constant temperature monitoring of the melt resulting in improved quality of the finished casting. They are available in a range of standard sizes as shown in the table below. These are often available ex-stock. Tubes outside these standard sizes are also available but with a slightly longer lead-time.

 size of sialon thermocouple protection tube

The exceptional heat and corrosion resistance properties of sialon and silicon nitride have been utilized in a range of products for non-ferrous molten metal handling. These include thermocouple protection sheaths, heater tube, and riser tubes, ladles and other foundry products.


Sialon thermocouple protection sheaths have excellent thermal shock resistance as a result of its high strength, low thermal expansion and high thermal conductivity. It is extremely resistant to corrosion by most nonferrous molten metal, particularly aluminium. There is therefore no contamination of the melt. In addition, sialon thermocouple protection tube is non wetting for most non-ferrous metals making it very resistant to build up of dross and therefore very low maintenance.


These unique properties give sialon thermocouple protection tube a significantly better service life over competitive materials such as chill cast iron and other ceramics materials such as silicon carbide and aluminium titanate.