3/8" OD larger diameter Alumina tube is made by high purity 99.8% (995) Al₂O₃ material. 998 alumina tube can be used at operating temperatures to 1750°C in both oxidizing and reducing atmospheres. Tubes have been evacuated to 10^-7 Torr at room temperature. 998 alumina tube proves inert to carbon and refractory metals in many severe situations:

SPECIFICATIONS

Purity	Al2O3 > 99.8% Made in USA
Density	> 3.91 g /cm3
I.D	2-1/8"+/- 0.085" (53.98 +/- 2.16 mm)
O.D	2-3/8"+/- 0.095" (60.33 +/- 2.41 mm)
Length	1000 mm (40"")
Max. working temperature	1750 oC
Warning	Please don't use alumina tube under vacuum at temperature > 1500 oC when vertically-mounted and >1400 oC when horizontally-mounted Mcdanel strongly recommends keep ramp rate less than 100oC/ hour at 400 - 1700 oCrange Please keep thermal gradient less than 100oC/ inch to avoids cracking Parts should not be placed directly onto the inside surface of a hot furnace tube increase of thermal shock Please handle the tube carefully. Warranty does not include tube (but only for machine MTI provided)
Application Notes	Replace tube for MTI tube furnaces Operating from 1600oC to 1750oC Please click here to learn how to use and maintain Alumina tube in MT temperature tube furnace. In order get longer tube service life, Please use quartz or alumia crucible to carry sample, instead loading sample directly inside tube, please click picture below to choose one crucible boat:

Inspect your delivery:
Please check package for damages before accepting delivery.
Should damages found, please keep all packaging materials, take pictures, and report immediately to carrier/MTI.