Ceramic Coated Cast Iron Thermocouple Tubes

For measuring the temperature in molten aluminium up to 800 degrees Celsius.

The ceramic coating gives an additional 300% longer service life than uncoated protection tubes. These tubes are typically used in melting furnace where mechanical impact is an important issue.

20 in stock (can be backordered)

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Sialon data sheet

Material data sheet

Sialon (Si3Al3O3N5)

Typical Sialon grades

NVD-001

NVD-002

NVD-003

NVD-004

Bulk Density

g/cm3

3.2

3.1

3.3

3.2

Water Absorption

0

0

0

0

Flexural Strength

MPa

580

900

1,020

790

Vickers Hardness HV1

GPa

13.9

12.7

15.0

13.8

Fracture Toughness (SEPB)

MPam1/2

4 ~ 5

6 ~ 7

7

6 ~ 7

Young’s Modulus of Elasticity

GPa

290

270

300

290

Poisson’s Ratio

0.28

0.28

0.28

0.28

Coefficient of Linear Thermal (40 – 800 °C)

Expansion

×10-6/℃

3.2

3.4

3.3

3.5

Thermal Conductivity (20℃)

W/(m・k)

25

23

27

54

Specific Heat

J/(g・k)

0.64

0.66

0.65

0.66

Heat Shock Resistance

550

800

800

900

Volume Resistivity (20℃)

Ω・cm

>1014

>1014

>1014

>1014

Technical data

Ceramic Coated Cast Iron Thermocouple TubesCeramic coated or uncoated cast iron thermocouple protection tubes or custom built thermocouple assemblies for use in aluminium furnaces and baths.

Physical properties:

Density: 7.1 g/cm³

Tensile Strength: 207 Mpa

Thermal Conductivity: 40 W/(m*k) @ 500 °C

Maximum Temperature: 800 °C with  ceramic coating 1150 °C without coating

Dimensions:  43 mm (OD) X 23 mm (ID)

Threading: ¾ inch NPT is standard, other threading available upon request.

Enamel Coating: Alumina, Silica and Borax

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