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SYALON 201
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Syalon 201 is an advanced silicon nitride (Si₃N₄) ceramic offering outstanding mechanical properties up to 1350°C.

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Syalon 201, a silicon nitride based advanced ceramic, is a specially formulated grade based on the β-sialon phase found in Syalon 101 but with a crystalline intergranular phase of yttrium aluminium garnet (YAG). This enables Syalon 201 to exhibit significant retention of strength at high temperatures up to 1350°C.

Syalon 201 is an outstanding engineering grade material which is characterised by excellent high temperature strength and hardness. It has found use in molten metal handling applications where the use of Syalon 101 is limited due to its reduction in strength above about 1000°C.

The table below lists typical thermomechanical and electrical properties for Syalon 201.

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Syalon 201 - Physical Property Data

PROPERTY
VALUE
UNITS
Composition
β-Sialon
-
Density
3.24
g/cc
Porosity
0
%
3-point MOR at 20°C ⁺
825
MPa
3-point MOR at 1000°C ⁺
750
MPa
3-point MOR at 1400°C ⁺
600
MPa
Weibull Modulus
10
-
Compressive Strength
>3500
MPa
Young's Modulus
290
GPa
Poisson's Ratio
0.23
-
Hardness (HRA)
92.7
-
Hardness (Vickers Hv50)
16.18 (1650)
GPa (Kg/mm²)
Fracture Toughness (K₁c)
4.5
MPa m½
Thermal Expansion Coefficient ⁺⁺
3.0x10⁻⁶
K⁻¹
Thermal Conductivity
21
W/(mK)
Maximum Use Temperature
1450
°C
Thermal Shock Resistance
600
ΔT°C ⁺⁺⁺
Electrical Resistivity
10¹²
Ω cm
⁺ Modulus of rupture specimen 3 × 3 × 50mm, span 19.05mm
⁺⁺ Thermal expansion coefficient temperature range: 0-1200°C
⁺⁺⁺ Quenched into cold water
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. See our disclaimer.
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The successful integration of advanced technical ceramics into engineering systems requires close collaboration between you, the end-user, and ourselves, the material manufacturer. Please call +44(0)191 2951010 or email for an initial consultation with our technical sales team, or send us a Request for Quote.

In addition, see our resources section for guides on designing with ceramics and more property data comparing Syalon 201 with other engineering ceramics.