40" LONG McDanel MV 30 HIGH PURITY MULLITE ALUMINO-SILICATE TUBE No.: 368

Description

HIGH PURITY MULLITE PORCELAINITE CERAMIC TUBE
TUBING PIPING REFRACTORY WARE 40” LONG
No.: 368
You are buying ONE (1) only of Forty (40”) inch long Mullite or Porcelainite tube piping refractory. It is in very good condition being NOS (New Old Stock). There are some edge chips at one end of the tube that will not effect the performance of this component. It is an Alumino-Silicate material made primarily from high purity Mullite mineral typically 99% or better. The chemical formula is 3Al
2
O
3
•2SiO
2
indicating that is three parts Aluminum Oxide (Al
2
O
3
) which of course is Alumina and two parts Silicon Dioxide (SiO
2
) which is Silica from an atomic molar perspective.
Mullite is an excellent structural material due to its high temperature stability, strength and creep resistance. It has a low dielectric constant and high electrical insulation capabilities. Typical applications include kiln furniture, furnace center tubes, heat exchange parts, heat insulation parts and rollers. Your imagination is the only limiting factor in the spectrum of possible applications for this component. Be sure to view all photos as they are an integral component of the item description.
The specifications for these components are as follows:
Outside Diameter:
Average approximately 1.750" +0.050"/ -0.000" (44.5 mm)
Inside Diameter:
Average Approximately 1.50”+0.005"/ -0.005"   (38.0 mm)
Length:
40.00” (1080 mm)
Please Note:
There are visually discernible differences in any or all of the dimensions. These are not precision technical ceramic components. There is no warp or camber Specification for this item. However they are relatively flat. There may also be “firing” color variations inherent in the material. The thermal shock resistance is not very high so exercise rule of thumb caution. “The larger the piece of material the slower the rate of temperature increase should be applied to the piece.” Heat up slowly to avoid cracking in use.
Physical
Chemical Formula:
3Al
2
O
3
-SiO
2
Specific Gravity or Density: 2.80 g/cm3
ASTM C20
Color: Grey - off White
Crystal Structure: Orthorhombic
Water Absorption % at (R.T.) 0.0%
ASTM C373
Hardness: Mohs 8
Hardness: Knoop 1450 (kg/mm2) Knoop 100 g
Mechanical
Compressive Strength: 551MPa @ R.T.
ASTM C773
Tensile Strength: 103.5MPa @ R.T.
ACMA Test4
Modulus of Elasticity(Young’s Modulus): 150 GPa
ASTM C848
Flexural Strength (MOR) 180 MPa @ R.T.
ASTM F417
Poisson’s Ratio: 0.25
ASTM C818
Fracture Toughness, 2.0KIc MPa x m
1/2
Notched Beam Test
Thermal
Max. Use Temperature (in air): 1700ºC
No load condition
Thermal Shock Resistance: 300T (ºC)
Quenching
Thermal Conductivity 3.5W/m-K @ R.T.
ASTM C408
Coefficient of Linear Thermal Expansion
(~25ºC through ±1000ºC):
5.3m/m-ºC
ASTM C372
Specific Heat: 0.23cp cal/g-ºC @ R.T.
ASTM C351
Electrical
Dielectric Constant 1 MHz @ R.T.: 6.0
ASTM D150
Dielectric Strength: 9.8kV/mm
ASTM D116
Electrical Resistivity: 10
13
Ωcm @ R.T.
ASTM D1829
If you require additional technical information, design, or application engineering consultation, feel free to contact us. As a materials scientist with four decades experience in high temperature processing, ceramics, dentistry, and jewelry manufacture it will be possible to provide you with creative and imaginative approaches to your requirements.
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No.: 368