Solid alumina ceramic rods
C799 alumina rods, solid, in 8 diameters from Ø2 to 12 mm, about 2400 mm long and all in stock. Diameters carry a +0.2 mm grinding allowance, and lengths are cut to order.
- alumina
- C799
- alumina
- diameter, all 8 in stock
- Ø2–12 mm
- diameter, all 8 in stock
- rod length
- ~2400 mm
- rod length
- grinding allowance
- +0.2 mm
- grinding allowance
Configurations
- Solid round rod
- Ø2–12 mm, 8 stock diameters
- About 2400 mm long
- Cut to length
Properties
- High-temperature resistance
- Corrosion resistance
- Mechanical strength
- Electrical insulation
Ordering
- Minimum order, non-standard parts
- 100 pcs
- Usually, per item made to your drawing or sample.
- Samples for approval
- 5–10 pcs
- Usually sent for you to approve before the order runs.
- Production lead time
- 25–30 days
- Usual production cycle for non-standard parts.
- Standard sizes from stock
- ~3–7 days
- Stock covers most standard sizes. Small orders ship in about 3 days, bulk orders in about 7 days.
Typical terms. Quantities and dates for your order are confirmed in its quotation.
Stock rod sizes
All eight diameters are in stock as rods about 2400 mm long. Lengths are cut to order.
Dimensions in mm
| Diameter | Length | Stock | Grinding allowance |
|---|---|---|---|
| Ø2 | ~2400 | In stock | +0.2 |
| Ø3 | ~2400 | In stock | +0.2 |
| Ø4 | ~2400 | In stock | +0.2 |
| Ø5 | ~2400 | In stock | +0.2 |
| Ø6 | ~2400 | In stock | +0.2 |
| Ø8 | ~2400 | In stock | +0.2 |
| Ø10 | ~2400 | In stock | +0.2 |
| Ø12 | ~2400 | In stock | +0.2 |
Standard sizes usually ship from stock in 3–7 days.
Diameters usually run up to 0.2 mm over nominal, plus side only. That margin is left for grinding the rod to your final size.
From our factory's stock list, October 2026.
Grade and material data
C799 alumina (corundum), 99.5% Al₂O₃.
Full material dataGuides
Sizes, grades and tolerances in more detail.
- Buyer FAQ: minimum order, lead time, stock, samples, ISO 9001 and test reports What buyers ask before ordering: minimum order, lead time, which sizes are in stock, samples, the ISO 9001 certificate, lab reports and packing.
- Alumina maximum temperature: why tubes are rated 1,600 °C or 1,800 °C, and what lowers it Why the same alumina is quoted at 1,400, 1,600 and 1,800 °C, the limits by grade and by use, and what brings them down: vacuum, load, fast heating, alkali and glass.
- Alumina vs aluminum (aluminium): the ceramic and the metal compared Alumina is aluminium oxide, a white ceramic; aluminium is the metal. Melting point, density and conductivity side by side, the names suppliers use, and how to order the right one.
Questions buyers ask
- Which alumina rod diameters do you keep in stock?
- Eight: 2, 3, 4, 5, 6, 8, 10, 12 mm. All of them are in stock as solid rods about 2400 mm long.
- Can you cut the rods to length?
- Yes. Lengths are cut to order, so give the length per piece on your enquiry, or order full-length rods of about 2400 mm.
- What alumina grade are the rods?
- C799 alumina, 99.5% Al₂O₃.
- What is the diameter tolerance?
- Usually +0.2 mm, plus side only: a 6 mm rod measures 6.0 to 6.2 mm. The extra is left as grinding allowance, so you can grind the rod to an exact size.
- How fast do stock rods ship?
- Small orders usually ship in about 3 days and bulk orders in about 7 days.
- Can we test samples first?
- Yes. We usually send 5–10 free samples, short pieces of the same size, and you pay the courier.
- Is an alumina rod the same as an aluminum rod?
- No. Alumina is aluminium oxide (Al₂O₃), a fired ceramic that insulates electrically and takes high heat. Aluminum is the metal. Chinese suppliers often call our rods corundum rods (刚玉棒).
What to send for a quote
- 01Diameter, from the stock sizes above
- 02Length per piece, or full-length rods
- 03Operating temperature and atmosphere, if known
- 04Quantity
Next family:Custom alumina and industrial ceramic components
Request a quote
Get a quotation for alumina rods.
Tell us the dimensions, grade and quantity. We confirm the grade, dimensions and tolerances in each quotation. Our yearly lab reports are available on request.