50 × 40 mm alumina furnace tube
OD 50 mm · ID 40 mm · wall 5 mm
- Standard size
An open-ended alumina work tube for laboratory, resistance, electric and heat-treatment furnaces. The sample or process gas runs through the bore, and the tube keeps it apart from the heating elements.
Specifications
Nominal dimensions from our factory's standard-size list, September 2026.
| Outside diameter (OD) | 50 mm |
|---|---|
| Inside diameter (ID) | 40 mm |
| Wall thickness | 5 mmcomputed: (OD − ID) ÷ 2 |
| Length | 1500 mm, standard length |
| Availability | Standard size. Stock covers most standard sizes; the quotation confirms availability |
| Material and grade | Alumina and corundum. Purity and maximum temperature are confirmed per SKU at quotation. |
Tolerances on our 2026 orders
What buyers wrote on the orders we supplied in 2026 for 50–65 mm OD. They are what was ordered and delivered, not a promise for every order: the tolerance for your order is the one in its quotation.
| Dimension | Tolerance on orders (mm) |
|---|---|
| OD | ±2 |
| ID | ±2 |
| Length | ±2 |
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.
Request a quote
Get a quotation for the 50 × 40 mm furnace tube.
Tell us the dimensions, grade and quantity. A contractual datasheet with current, product-specific test data and tolerances comes with each quotation.