Alumina Oxide Rods | McMaster-Carr

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Shape

System of Measurement

Diameter

Length

Maximum Temperature

Color

Porosity

Compressive Strength

Performance

Ultra High Temperature

Fabrication

Dielectric Strength

Thermal Conductivity @ Temperature

208 BTU⋅in/(hr⋅ft²⋅°F) @ 68° F

4.5 BTU⋅in/(hr⋅ft²⋅°F) @ 212° F

194.5 BTU⋅in/(hr⋅ft²⋅°F) @ 212° F

Density

Hardness

Tensile Strength

Flexural Strength

U.S.–Mexico–Canada Agreement (USMCA) Qualifying

Yes

RoHS

Compliant

Minimum Temperature

Not Rated

DFARS Specialty Metals

Exempt

Export Control Classification Number (ECCN)

Clarity

REACH

169 Products

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Nonporous Ceramic Alumina Rods and Discs

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.

Rods

			Temp.							6" Lg.		12" Lg.
Dia.	Dia. Tolerance	Color	Min.	Max., ° F	Fabrication	Dielectric Strength, V/mil	Porosity	Compressive Strength, psi	Hardness		Each		Each



	1/16"	-0.001" to 0.001"	White	Not Rated	3,075	Fired	220	0%	300,000	Rockwell 45N 83	87065K71	000000	87065K41	000000


	1/8"	-0.004" to 0.004"	White	Not Rated	3,075	Fired	220	0%	300,000	Rockwell 45N 83	87065K72	00000	87065K42	00000
	3/16"	-0.006" to 0.006"	White	Not Rated	3,075	Fired	220	0%	300,000	Rockwell 45N 83	87065K73	00000	87065K44	00000
	13/64"	-0.012" to 0.000"	White	Not Rated	3,075	Fired	220	0%	300,000	Rockwell 45N 83	———	0	87065K45	00000
	1/4"	-0.008" to 0.008"	White	Not Rated	3,075	Fired	220	0%	300,000	Rockwell 45N 83	87065K74	00000	87065K46	00000
	5/16"	-0.009" to 0.009"	White	Not Rated	3,075	Fired	220	0%	300,000	Rockwell 45N 83	———	0	87065K48	00000
	3/8"	-0.011" to 0.011"	White	Not Rated	3,075	Fired	220	0%	300,000	Rockwell 45N 83	87065K75	00000	87065K49	00000
	1/2"	-0.015" to 0.015"	White	Not Rated	3,075	Fired	220	0%	300,000	Rockwell 45N 83	87065K76	00000	87065K51	00000
	5/8"	-0.031" to 0.031"	White	Not Rated	3,075	Fired	220	0%	300,000	Rockwell 45N 83	87065K77	00000	87065K53	000000
	3/4"	-0.039" to 0.039"	White	Not Rated	3,075	Fired	220	0%	300,000	Rockwell 45N 83	87065K78	00000	87065K55	000000

Discs

			Temp.							1/16" Lg.		1/8" Lg.		3/16" Lg.
Dia.	Dia. Tolerance	Color	Min.	Max., ° F	Fabrication	Dielectric Strength, V/mil	Porosity	Compressive Strength, psi	Hardness		Each		Each		Each



	1"	-0.050" to 0.050"	White	Not Rated	3,075	Fired	220	0%	300,000	Rockwell 45N 83	8464K22	000000	———	0	———	0


	2 1/2"	-0.125" to 0.125"	White	Not Rated	3,075	Fired	220	0%	300,000	Rockwell 45N 83	———	0	8464K29	000000	———	0
	6"	-0.180" to 0.180"	White	Not Rated	3,075	Fired	220	0%	300,000	Rockwell 45N 83	———	0	———	0	8464K39	0000000

Tight-Tolerance Nonporous Ceramic Alumina Rods

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.

			Temp.							12" Lg.		24" Lg.		36 Lg.
Dia.	Dia. Tolerance	Color	Min.	Max., ° F	Fabrication	Dielectric Strength, V/mil	Porosity	Compressive Strength, psi	Hardness		Each		Each		Each



	1/16"	-0.001" to 0.001"	White	Not Rated	3,075	Fired	220	0%	300,000	Rockwell 45N 83	8446K21	000000	———	0	———	0


	5/64"	-0.001" to 0.001"	White	Not Rated	3,075	Fired	220	0%	300,000	Rockwell 45N 83	8446K22	00000	———	0	———	0
	1/8"	-0.001" to 0.001"	White	Not Rated	3,075	Fired	220	0%	300,000	Rockwell 45N 83	8446K11	00000	8446K25	0000000	8446K26	0000000
	3/16"	-0.001" to 0.001"	White	Not Rated	3,075	Fired	220	0%	300,000	Rockwell 45N 83	8446K13	00000	———	0	8446K28	000000
	1/4"	-0.001" to 0.001"	White	Not Rated	3,075	Fired	220	0%	300,000	Rockwell 45N 83	8446K15	00000	8446K29	000000	8446K31	000000
	3/8"	-0.001" to 0.001"	White	Not Rated	3,075	Fired	220	0%	300,000	Rockwell 45N 83	8446K17	000000	8446K32	000000	8446K33	000000
	1/2"	-0.001" to 0.001"	White	Not Rated	3,075	Fired	220	0%	300,000	Rockwell 45N 83	8446K19	000000	8446K34	000000	———	0

Nonporous Ceramic Alumina Tubes

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.

				Temp.							6" Lg.		12" Lg.		24" Lg.
OD	ID	Wall Thk.	Color	Min.	Max., ° F	Fabrication	Dielectric Strength, V/mil	Porosity	Compressive Strength, psi	Hardness		Each		Each		Each



	0.050"	0.020"	0.015"	White	Not Rated	3,075	Fired	220	0%	300,000	Rockwell 45N 83	8746K586	000000	8746K431	000000	8746K432	000000


	0.063"	0.031"	0.016"	White	Not Rated	3,075	Fired	220	0%	300,000	Rockwell 45N 83	8746K587	00000	8746K451	00000	8746K452	00000
	0.094"	0.040"	0.027"	White	Not Rated	3,075	Fired	220	0%	300,000	Rockwell 45N 83	8746K553	00000	8746K584	00000	8746K585	00000
	0.094"	0.063"	0.016"	White	Not Rated	3,075	Fired	220	0%	300,000	Rockwell 45N 83	8746K554	00000	8746K461	00000	8746K462	00000
	0.100"	0.050"	0.025"	White	Not Rated	3,075	Fired	220	0%	300,000	Rockwell 45N 83	8746K555	00000	8746K578	00000	8746K581	00000
	1/8"	0.063"	0.031"	White	Not Rated	3,075	Fired	220	0%	300,000	Rockwell 45N 83	8746K556	00000	8746K11	00000	8746K312	00000
	0.156"	0.094"	0.031"	White	Not Rated	3,075	Fired	220	0%	300,000	Rockwell 45N 83	8746K557	00000	8746K12	00000	8746K322	00000
	0.187"	0.094"	0.047"	White	Not Rated	3,075	Fired	220	0%	300,000	Rockwell 45N 83	8746K558	00000	8746K13	00000	8746K332	00000
	0.187"	1/8"	0.032"	White	Not Rated	3,075	Fired	220	0%	300,000	Rockwell 45N 83	8746K559	00000	8746K14	00000	8746K342	00000
	0.219"	0.156"	0.031"	White	Not Rated	3,075	Fired	220	0%	300,000	Rockwell 45N 83	8746K56	00000	8746K471	00000	8746K472	00000
	1/4"	1/8"	0.063"	White	Not Rated	3,075	Fired	220	0%	300,000	Rockwell 45N 83	8746K561	00000	8746K15	00000	8746K352	00000


	1/4"	0.156"	0.047"	White	Not Rated	3,075	Fired	220	0%	300,000	Rockwell 45N 83	8746K562	00000	8746K16	00000	8746K362	00000
	1/4"	0.188"	0.031"	White	Not Rated	3,075	Fired	220	0%	300,000	Rockwell 45N 83	8746K563	00000	8746K17	00000	8746K372	00000
	0.313"	0.188"	0.063"	White	Not Rated	3,075	Fired	220	0%	300,000	Rockwell 45N 83	8746K564	00000	8746K579	00000	8746K582	00000
	0.313"	0.219"	0.047"	White	Not Rated	3,075	Fired	220	0%	300,000	Rockwell 45N 83	8746K565	00000	8746K481	00000	8746K482	00000
	3/8"	1/4"	0.063"	White	Not Rated	3,075	Fired	220	0%	300,000	Rockwell 45N 83	8746K566	00000	8746K18	00000	8746K382	00000
	0.438"	0.313"	0.063"	White	Not Rated	3,075	Fired	220	0%	300,000	Rockwell 45N 83	8746K567	00000	8746K491	00000	8746K492	00000
	1/2"	1/4"	0.125"	White	Not Rated	3,075	Fired	220	0%	300,000	Rockwell 45N 83	8746K568	00000	8746K19	00000	8746K392	00000
	1/2"	3/8"	0.063"	White	Not Rated	3,075	Fired	220	0%	300,000	Rockwell 45N 83	8746K569	00000	8746K21	00000	8746K412	000000
	0.590"	0.394"	0.098"	White	Not Rated	3,075	Fired	220	0%	300,000	Rockwell 45N 83	8746K57	00000	8746K58	00000	8746K583	00000
	0.590"	0.433"	0.078"	White	Not Rated	3,075	Fired	220	0%	300,000	Rockwell 45N 83	8746K571	00000	8746K511	00000	8746K512	000000


	5/8"	1/2"	0.063"	White	Not Rated	3,075	Fired	220	0%	300,000	Rockwell 45N 83	8746K572	00000	8746K22	00000	8746K422	00000
	0.688"	1/2"	0.094"	White	Not Rated	3,075	Fired	220	0%	300,000	Rockwell 45N 83	8746K573	00000	8746K521	00000	8746K522	000000
	3/4"	1/2"	0.125"	White	Not Rated	3,075	Fired	220	0%	300,000	Rockwell 45N 83	8746K574	00000	8746K24	00000	8746K442	000000
	3/4"	0.563"	0.094"	White	Not Rated	3,075	Fired	220	0%	300,000	Rockwell 45N 83	8746K575	00000	8746K531	00000	8746K532	000000
	7/8"	5/8"	0.125"	White	Not Rated	3,075	Fired	220	0%	300,000	Rockwell 45N 83	8746K576	00000	8746K541	000000	8746K542	000000
	1"	3/4"	0.125"	White	Not Rated	3,075	Fired	220	0%	300,000	Rockwell 45N 83	8746K577	000000	8746K551	000000	8746K552	000000

Nonporous Ceramic Alumina Multiple-Bore Tubes


2 Bores	4 Bores

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.

				Temp.							6" Lg.		18" Lg.		24" Lg.
No. of Bores	OD	ID	Color	Min.	Max., ° F	Fabrication	Dielectric Strength, V/mil	Porosity	Compressive Strength, psi	Hardness		Each		Each		Each



	2	0.063"	0.016"	White	Not Rated	3,075	Fired	220	0%	300,000	Rockwell 45N 83	87175K11	000000	87175K12	000000	———	0


	2	0.094"	0.025"	White	Not Rated	3,075	Fired	220	0%	300,000	Rockwell 45N 83	87175K14	00000	87175K71	00000	87175K73	000000
	2	0.109"	0.031"	White	Not Rated	3,075	Fired	220	0%	300,000	Rockwell 45N 83	87175K15	00000	87175K16	00000	87175K17	00000
	2	0.125"	0.031"	White	Not Rated	3,075	Fired	220	0%	300,000	Rockwell 45N 83	87175K18	00000	87175K19	00000	87175K21	00000
	2	0.125"	0.040"	White	Not Rated	3,075	Fired	220	0%	300,000	Rockwell 45N 83	87175K22	00000	———	0	87175K79	00000
	2	0.125"	0.04"	White	Not Rated	3,075	Fired	220	0%	300,000	Rockwell 45N 83	———	0	87175K77	00000	———	0
	2	0.156"	0.052"	White	Not Rated	3,075	Fired	220	0%	300,000	Rockwell 45N 83	87175K23	00000	87175K24	00000	87175K25	00000
	2	0.188"	0.040"	White	Not Rated	3,075	Fired	220	0%	300,000	Rockwell 45N 83	87175K26	00000	87175K27	00000	———	0
	2	0.188"	0.047"	White	Not Rated	3,075	Fired	220	0%	300,000	Rockwell 45N 83	87175K29	00000	———	0	———	0
	2	0.188"	0.063"	White	Not Rated	3,075	Fired	220	0%	300,000	Rockwell 45N 83	87175K33	00000	87175K83	00000	87175K84	00000
	2	0.200"	0.052"	White	Not Rated	3,075	Fired	220	0%	300,000	Rockwell 45N 83	87175K34	00000	87175K35	00000	———	0


	2	0.240"	0.078"	White	Not Rated	3,075	Fired	220	0%	300,000	Rockwell 45N 83	87175K41	00000	87175K42	00000	87175K43	00000
	2	0.250"	0.063"	White	Not Rated	3,075	Fired	220	0%	300,000	Rockwell 45N 83	87175K37	00000	87175K38	00000	87175K39	00000
	4	0.062"	0.016"	Off-White	Not Rated	3,180	Fired	320	0%	384,000	Rockwell C71	87175K433	00000	———	0	———	0
	4	0.094"	0.020"	White	Not Rated	3,075	Fired	220	0%	300,000	Rockwell 45N 83	87175K51	00000	———	0	———	0
	4	0.109"	0.020"	White	Not Rated	3,075	Fired	220	0%	300,000	Rockwell 45N 83	87175K54	00000	87175K55	00000	87175K56	00000
	4	0.188"	0.031"	White	Not Rated	3,075	Fired	220	0%	300,000	Rockwell 45N 83	87175K57	00000	87175K91	00000	87175K93	00000
	4	0.188"	0.047"	White	Not Rated	3,075	Fired	220	0%	300,000	Rockwell 45N 83	87175K58	00000	87175K59	00000	87175K61	00000
	4	0.219"	0.050"	White	Not Rated	3,075	Fired	220	0%	300,000	Rockwell 45N 83	87175K62	00000	87175K63	00000	87175K64	00000
	4	0.258"	0.078"	White	Not Rated	3,075	Fired	220	0%	300,000	Rockwell 45N 83	87175K65	00000	87175K66	00000	87175K67	00000

Ultra-High-Temperature Easy-Machine Ceramic Alumina Rods

Commonly used in induction furnace components and hot glass handling, this ceramic alumina 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.

			Temp.								12" Lg.
Dia.	Dia. Tolerance	Color	Min.	Max., ° F	Fabrication	Performance	Dielectric Strength, V/mil	Porosity	Compressive Strength, psi	Hardness		Each



	1/2"	-0.063" to 0.063"	White	Not Rated	3,000	Fired	Easy Machine, Ultra High Temperature	75	48%	4,350	Durometer 86D	8978T71	0000000


	3/4"	-0.063" to 0.063"	White	Not Rated	3,000	Fired	Easy Machine, Ultra High Temperature	75	48%	4,350	Durometer 86D	8978T73	000000
	1"	-0.063" to 0.063"	White	Not Rated	3,000	Fired	Easy Machine, Ultra High Temperature	75	48%	4,350	Durometer 86D	8978T75	000000
	1 1/2"	-0.063" to 0.063"	White	Not Rated	3,000	Fired	Easy Machine, Ultra High Temperature	75	48%	4,350	Durometer 86D	8978T77	000000