Alumina Oxide Rods | McMaster-Carr

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	Material Material	Show

Ceramic

Alumina Ceramic

	Material Material	Hide

	Shape Shape


Rod and Disc	Round Tube

	System of Measurement System of Measurement

Inch

	Diameter Diameter

	Length Length

	OD OD

	ID ID

	Maximum Temperature Maximum Temperature

3,000° to 3,999° F

	Color Color

	White

	Porosity Porosity

48%

	Compressive Strength Compressive Strength

4,350 psi

300,000 psi

	Thermal Conductivity Thermal Conductivity

4.5 Btu/hr. × in./sq. ft./°F @
212° F

194.5 Btu/hr. × in./sq. ft./°F @
212° F

	Fabrication Fabrication

Fired

	Hardness Hardness

Durometer 86D

Rockwell 45N 83

	Density Density

0.075 lbs./cu. in.

0.14 lbs./cu. in.

	Flexural Strength Flexural Strength

3,150 psi

54,000 psi

	Clarity Clarity

Opaque

	Dielectric Strength Dielectric Strength

75 V/mil

220 V/mil

	Tensile Strength Tensile Strength

31,000 psi

	DFARS (Defense Acquisition Regulations Supplement) DFARS (Defense Acquisition Regulations Supplement)

DFARS Specialty Metals
COTS-Exempt

	Minimum Temperature Minimum Temperature

Not Rated

	Modulus of Elasticity Modulus of Elasticity

0.054 ksi × 10⁶

	Refractive Index Refractive Index

167 Products

Nonporous Alumina Ceramic Rods and Discs

Color: White
Max. Temperature: 3075° F
Fabrication: Fired
Porosity: 0%
Compressive Strength: 300,000 psi

Seal out air and gas in high-temperature and high-wear applications. This ultrahard ceramic can also be used in applications that require superior strength.

For technical drawings and 3-D models, click on a part number.

Rods

		12" Lg.
Dia.	Dia. Tolerance		Each
1/16"	-0.003" to 0.003"	00000000	000000
1/8"	-0.004" to 0.004"	00000000	00000
3/16"	-0.006" to 0.006"	00000000	00000
13/64"	-0.012" to 0.000"	00000000	00000
1/4"	-0.008" to 0.008"	00000000	00000
5/16"	-0.009" to 0.009"	00000000	00000
3/8"	-0.011" to 0.011"	00000000	00000
1/2"	-0.015" to 0.015"	00000000	00000
5/8"	-0.019" to 0.019"	00000000	00000
3/4"	-0.023" to 0.023"	00000000	00000

Discs

Dia.	Dia. Tolerance	Lg.		Each
1"	-0.050" to 0.050"	1/16"	0000000	000000
2 1/2"	-0.125" to 0.125"	1/8"	0000000	00000
6"	-0.180" to 0.180"	3/16"	0000000	000000

Nonporous Alumina Ceramic Tubes

Color: White
Max. Temperature: 3075° F
Fabrication: Fired
Porosity: 0%
Compressive Strength: 300,000 psi

Seal out air and gas in high-temperature and high-wear applications. This ultrahard ceramic can also be used in applications that require superior strength.

			6" Lg.		12" Lg.		24" Lg.
OD	ID	Wall Thick.		Each		Each		Each
0.050"	0.020"	0.015"	00000000	000000	00000000	000000	00000000	000000
0.063"	0.031"	0.016"	00000000	00000	00000000	00000	00000000	00000
0.094"	0.040"	0.027"	00000000	00000	00000000	00000	00000000	00000
0.094"	0.063"	0.016"	00000000	0000	00000000	00000	00000000	00000
0.100"	0.050"	0.025"	00000000	0000	00000000	00000	00000000	00000
1/8"	0.063"	0.031"	00000000	0000	0000000	00000	00000000	00000
0.156"	0.094"	0.031"	00000000	0000	0000000	00000	00000000	00000
0.187"	0.094"	0.047"	00000000	0000	0000000	00000	00000000	00000
0.187"	1/8"	0.032"	00000000	0000	0000000	00000	00000000	00000
0.219"	0.156"	0.031"	0000000	0000	00000000	00000	00000000	00000
1/4"	1/8"	0.063"	00000000	0000	0000000	00000	00000000	00000
1/4"	0.156"	0.047"	00000000	0000	0000000	00000	00000000	00000
1/4"	0.188"	0.031"	00000000	0000	0000000	00000	00000000	00000
0.313"	0.188"	0.063"	00000000	00000	00000000	00000	00000000	00000
0.313"	0.219"	0.047"	00000000	00000	00000000	00000	00000000	00000
3/8"	1/4"	0.063"	00000000	00000	0000000	00000	00000000	00000
0.438"	0.313"	0.063"	00000000	00000	00000000	00000	00000000	00000
1/2"	1/4"	0.125"	00000000	00000	0000000	00000	00000000	00000
1/2"	3/8"	0.063"	00000000	00000	0000000	00000	00000000	00000
0.590"	0.394"	0.098"	0000000	00000	0000000	00000	00000000	00000
0.590"	0.433"	0.078"	00000000	00000	00000000	00000	00000000	00000
5/8"	1/2"	0.063"	00000000	00000	0000000	00000	00000000	00000
0.688"	1/2"	0.094"	00000000	00000	00000000	00000	00000000	00000
3/4"	1/2"	0.125"	00000000	00000	0000000	00000	00000000	00000
3/4"	0.563"	0.094"	00000000	00000	00000000	00000	00000000	000000
7/8"	5/8"	0.125"	00000000	00000	00000000	00000	00000000	000000
1"	3/4"	0.125"	00000000	00000	00000000	000000	00000000	000000

Nonporous Alumina Ceramic Multiple-Bore Tubes

Two Bores

Four Bores

Color: White
Max. Temperature: 3075° F
Fabrication: Fired
Porosity: 0%
Compressive Strength: 300,000 psi

Seal out air and gas in high-temperature and high-wear applications. This ultrahard ceramic can also be used in applications that require superior strength.

For technical drawings and 3-D models, click on a part number.

			6" Lg.		18" Lg.		24" Lg.
Number of Bores	OD	ID		Each		Each		Each
2	0.063"	0.016"	00000000	000000	00000000	000000	000000	00
2	0.094"	0.025"	00000000	0000	00000000	00000	00000000	000000
2	0.109"	0.031"	00000000	0000	00000000	00000	00000000	00000
2	0.125"	0.031"	00000000	0000	00000000	00000	00000000	00000
2	0.125"	0.040"	00000000	0000	00000000	00000	00000000	00000
2	0.156"	0.052"	00000000	0000	00000000	00000	00000000	00000
2	0.188"	0.040"	00000000	0000	00000000	00000	000000	00
2	0.188"	0.047"	00000000	0000	000000	00	000000	00
2	0.188"	0.063"	00000000	0000	00000000	00000	00000000	00000
2	0.200"	0.052"	00000000	0000	00000000	00000	000000	00
2	0.240"	0.078"	00000000	0000	00000000	00000	00000000	00000
2	0.250"	0.063"	00000000	0000	00000000	00000	00000000	00000
4	0.063"	0.016"	00000000	00000	000000	00	000000	00
4	0.085"	0.024"	00000000	00000	000000	00	00000000	00000
4	0.094"	0.020"	00000000	00000	000000	00	000000	00
4	0.109"	0.020"	00000000	0000	00000000	00000	00000000	00000
4	0.188"	0.031"	00000000	0000	00000000	00000	00000000	00000
4	0.188"	0.047"	00000000	0000	00000000	00000	00000000	00000
4	0.219"	0.050"	00000000	0000	00000000	00000	00000000	00000
4	0.258"	0.078"	00000000	0000	00000000	00000	00000000	00000

Tight-Tolerance Nonporous Alumina Ceramic Rods

Color: White
Max. Temperature: 3075° F
Fabrication: Fired
Porosity: 0%
Compressive Strength: 300,000 psi

Seal out air and gas in high-temperature and high-wear applications. This ultrahard ceramic can also be used in applications that require superior strength.

For technical drawings and 3-D models, click on a part number.

		12" Lg.		24" Lg.		36" Lg.
Dia.	Dia. Tolerance		Each		Each		Each
1/16"	-0.001" to 0.001"	0000000	000000	0000000	000000	000000	00
5/64"	-0.001" to 0.001"	0000000	00000	0000000	00000	000000	00
1/8"	-0.001" to 0.001"	0000000	00000	0000000	00000	0000000	0000000
3/16"	-0.001" to 0.001"	0000000	00000	0000000	000000	0000000	000000
1/4"	-0.001" to 0.001"	0000000	00000	0000000	000000	0000000	000000
3/8"	-0.001" to 0.001"	0000000	00000	0000000	000000	0000000	000000
1/2"	-0.001" to 0.001"	0000000	00000	0000000	000000	0000000	000000

Ultra-High-Temperature Easy-to-Machine Alumina Ceramic Rods

Color: White
Max. Temperature: 3000° F
Fabrication: Fired
Porosity: 48%
Compressive Strength: 4,350 psi

Commonly used in induction furnace components and hot glass handling, this alumina ceramic withstands higher temperatures than alumina-bisque ceramic. The 99% alumina content makes it suitable for high-vacuum applications. It has excellent machinability. Material comes fired and is unaffected by water.

For technical drawings and 3-D models, click on a part number.

		12" Lg.
Dia.	Dia. Tolerance		Each
1/2"	-0.063" to 0.063"	0000000	0000000
3/4"	-0.063" to 0.063"	0000000	000000
1"	-0.063" to 0.063"	0000000	000000
1 1/2"	-0.063" to 0.063"	0000000	000000