Alumina Ceramic Tubes
Get Elevated Temperature Stability with Alumina Ceramic Tubes
Sentro Tech’s alumina tubes, with 99.5% to 99.8% high-purity, offer elevated temperature stability. Alumina ceramic tubes come in custom sizes, including American and Metric, and offer a low material cost.
Minerals containing alumina used in alumina tubes make up nearly 15% of the earth’s crust making it practically inexhaustible and versatile. Alumina combines low thermal expansion, superior thermal conductivity, and high-compressive strength to make these furnace tubes thermal-shock resistant. Sentro Tech alumina furnace tube models come with elevated dielectric properties and offer a higher vacuum or protective atmosphere at an extreme temperature.
Benefits of Alumina Ceramic Tubes for High-Temperature
Our alumina tubes offer:
- Extreme high-temperature stability under reducing, inert, and high-vacuum conditions under high temperatures up to 1800°C.
- Extreme wear and abrasion resistance.
- Chemical corrosion resistance under high temperature.
- High dielectric properties.
- Protective atmospheres or high vacuum at high-temperature to eliminate contamination or impurity.
- Low material cost and custom size available.
- Available Tube Diameter From 3/16″ to 9″ for American size and 2 mm to 150 mm.
- Available Tube Length: From 1″ ( 25mm) To 72″ ( 1828mm).
- Most items are in stock and can be delivered in 1-3 days.
- Sentro Tech also offers a volume discount for all listed sizes if the order quantity is more than 5 pieces for the same size.
A 20-year lab furnace industry leader, Sentro Tech guarantees our materials to be the best for your particular applications. Contact us for a quote on alumina tubing for your high-temperature furnace today!
Request a Quote on Alumina Furnace Tubing
Physical Properties of Alumina Tubes |
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| MATERIAL | ALUMINA | |
| Composition | 99.80% AL2O3 | 99.5% AL2O3 |
| Bulk Specific Gravity (g/cc) | 3.9 | 3.8 |
| Color | Ivory | Ivory |
| Impenetrability | Gas Tight | Gas Tight |
| Dye Penetration A.S.T.M. | Tight | Tight |
| Flexural Strength (psi) | 70,000 | 50,000 |
| Compressive Strength (psi) | 370,000 | 350,000 |
| Tensile Strength (psi) | 43,000 | 33,000 |
| Maximum Working Temperature | 1800°C | 1750°C |
| Likely Sag Temp. Unsupported Tube* | 1600 oC | 1600 oC |
| Thermal Conductivity 24oC | 230 | 200 |
| (BTU-in/ft2-hr-oF) 800oC | 60 | 50 |
| Dielectric Strength 24oC V/Mil | 300 | 270 |
| Thermal Expansion (per oC x 10-6) | 8 | 8.4 |
| (24oC-1000 oC) | ||
| Hardness (Moh’s scale) | 9 | 9 |
| * Temperature at which an empty tube, 1 1/4″ diameter, suspended across an 18″ span, will sag 1/4″ in 1 hour. | ||
| Where sag is not acceptable, tubes must be adequately supported along the full length. | ||
Standard Alumina Tube Dimensions
