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  Home  Brass Spares for Thermocouple
 1Brass Spares for Thermocouple
 1Re - Crystallized Allumina Tubes
 1Ceramic Adhesive Cement for Thermocouple
Re - Crystallized Allumina Tubes
Typical & Chemical Properties
 
 Property Material  Units  Duralox 997
 Chemical Composition    Al2O3 : 99.7%  Alkali : 0.05%
 Colour    Creamish
 Density  gm/cc  3.85-3.90
 Porosity    Nil
 Hardness
 (Vicker's)
 (Moh's)
 HV10  1550-1600
 9+
 Flexural Strength  Kg/cm2  3000
 Young's Modulus  X 10-6  kg/cm2  3.5
 Coefficient of linear thermal expansion (25-1000°C)  X 10-6 / °C  8
 Thermal Conductivity (25°C)  W/m°K  26
 Max. working temp. in oxidizing atmosphere @ no load  °C  1800+
 Dielectric strength (25°C) (1.5mm thick)  KV/mm  25
 Volume Resistivity (25°C)  Ohm.cm  1014
 Thermal shock resistance  °C  Good
 (170°C)
 120-170°C
 
Chemical Characteristics
In Vacuum In Inert Atmosphere
Reacts with carbon at about 1650°C No reaction with molybdenum at 1800°C
Reacts with zirconia at about 1800°C No reaction with nickel at 1800°C
Reacts with magnesia at about 1900°C Slight reaction with niobium at 1600°C
Reacts with thoria at about 1990°C Violent reaction with niobium at 1800°C
Reacts with beryllia at about 1860°C Slight reaction with titanium at 1600°C
  Violent reaction with titanium at 1800°C
In Oxidising Atmosphere Slight reaction with beryllium at 1800°C
Reacts with magnesia at about 1600°C Slow reaction with silicon at 1400°C
Reacts with zirconia at about 1700°C Violent reaction with silicon at 1600°C
Reacts with thoria at about 1900°C Slow reaction with zirconium at 1600°C
  Violent reaction with zirconium at 1800°C
   
DIN Standard 40680 Medium Class
Dimensional tolerances and allowances are conforming to DIN Standard 40680 Medium Class
For (OD-ID) Diameters-Length-Camber-Ovality and Eccentricity
On diameter On diameter
1 to 5mm ± 0.2mm or 4% whichever is greater
5.1 to 40mm ± 0.3mm or 2% whichever is greater
   
On length  
20 to 150mm ± 0.5mm or 2% whichever is greater
151 to 1500mm ± 2mm or 1 % whichever is greater
Allowance on Cambe 0.5% of the length
Allowance on Ovality 0.1 mm or 0.5% of the diameter whichever is the greater
Allowance on Bore eccentricity 0.05mm or 0.5% of the diameter
   
Tolerances closer than above on request.
Alumina and mullite ceramic pyrometry tubes and parts are formed by high pressure extrusion, dry-wet bag isostatic pressing, uniaxial pressing, injection moulding and slip casting process, depending upon the geometry and construction of the part. We are constantly working for improvement of the product quality, hence the data given in the brochure may change as and when found necessary.
Information contained herein is to our best of knowledge, true and accurate and is based upon measurements made in our R&D Laboratory. Recommendations, suggestions and data are practical guidelines and not guarantees. Actual results may vary with conditions of use and with variations in the methods of manufacture, size and shape of the ceramic part.
 
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PEENA TRADERS
158, Veena Dalvai Industrial Estate, S.V.Road, Oshiwara,
Jogeshwari (W),
Mumbai - 400102, INDIA
Tel.: +91-22-26794098
Fax: +91-22-66780096
Email id.:info@bhahk.com
website: http://www.bhahk.com
Manufacturers, Exporters and Suppliers of Quality Industrial Ceramics, Technical Ceramics
We are the leading manufacturers, exporters and suppliers of these products and serving our oversas clients from the countries like
South Africa, middle East, Australia, Uk and etc.
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