Sialon - Physical and Mechanical Applications of Syalon 501

Syalon 501 is a composite grade sialon developed to provide an electrically conducting ceramic. This allows Syalon 501 to be electro-discharge machined into more complicated shapes than other Syalons without any detrimental loss in it’s fundamental properties.

Properties Possessed by Syalon 501

Syalon 501 possesses many of the physical properties of Syalon 101, including high strength, toughness and wear resistance, where temperatures do not exceed 800ºC, making it suitable for applications in industrial wear, metal forming and non-ferrous molten metal handling, for example.

Physical and Mechanical Properties of Syalon 501

The table below lists typical mechanical, thermal and electrical property data for Syalon 501.




3 point RT Modulus of Rupture (Specimen 3 x 3 x 50, span 19.05mm)



Weibull Modulus


RT Unit Tensile Strength



RT Hardness (HRA)


RT Hardness (Vickers Hv0.3)



Fracture Toughness K1C









Thermal Expansion Coefficient (0-1200°C)



Specific Heat



RT Thermal Conductivity



Thermal Shock Resistance


ΔT°C quenched in water

Electrical Resistivity


Ohm m

Typical physical property data obtained under test conditions. All properties have been measured by independent testing authorities. The values given only apply to the test bodies on which they were determined, and therefore can only be recommended values.

Applications of Syalons 501

Syalon 501 has found application for example as extrusion dies, complex moulds for metal and plastic forming and for die pressing and as a level sensor in the non-ferrous molten metal industry.

Exploiting Advantages of Syalon 501 for Your Applications

The successful integration of ceramics into industrial and engineering systems requires close collaboration between you, the end-user, and ourselves, the material suppliers. Our Technical Specialists are available to discuss your requirements in detail and assist in exploiting the significant advantages which Syalon 501 has to offer.

This information has been sourced, reviewed and adapted from materials provided by International Syalons.

For more information on this source, please visit International Syalons.



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