Alumina Silicate Rods | McMaster-Carr

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Ceramic

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Maximum Temperature

Thermal Conductivity @ Temperature

1.265 W/(m⋅°C) @ 20° C

Color

Gray

Density

0.09 lb/in³

Porosity

Compressive Strength

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Tensile Strength

Dielectric Strength

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Minimum Temperature

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Flexural Strength

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16 Products

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Compare our offering of composites to find the right material for you.

Low Thermal Expansion Alumina Silicate Ceramic Rods

Also known as lava and wonderstone, this material is often used in applications that require high temperature resistance and low thermal expansion, such as standoffs and welding jigs.

			Temp., ° F							3" Lg.		6" Lg.		9 1/2" Lg.
Dia.	Dia. Tolerance	Color	Min.	Max.	Fabrication	Dielectric Strength, V/mil	Porosity	Compressive Strength, psi	Hardness		Each		Each		Each



	1/8"	0.000" to 0.015"	Gray	72	2,010	Unfired	100	2%	25,000	Rockwell H59	0000000	000000	———	0	———	0


	1/4"	0.000" to 0.015"	Gray	72	2,010	Unfired	100	2%	25,000	Rockwell H59	0000000	00000	———	0	———	0
	3/8"	0.000" to 0.015"	Gray	72	2,010	Unfired	100	2%	25,000	Rockwell H59	———	0	0000000	000000	———	0
	1/2"	0.000" to 0.015"	Gray	72	2,010	Unfired	100	2%	25,000	Rockwell H59	———	0	0000000	00000	———	0
	5/8"	0.000" to 0.015"	Gray	72	2,010	Unfired	100	2%	25,000	Rockwell H59	———	0	0000000	00000	———	0
	3/4"	0.000" to 0.015"	Gray	72	2,010	Unfired	100	2%	25,000	Rockwell H59	———	0	———	0	0000000	000000
	7/8"	0.000" to 0.015"	Gray	72	2,010	Unfired	100	2%	25,000	Rockwell H59	———	0	———	0	0000000	00000
	1"	0.000" to 0.015"	Gray	72	2,010	Unfired	100	2%	25,000	Rockwell H59	———	0	———	0	0000000	000000
	1 1/4"	0.000" to 0.015"	Gray	72	2,010	Unfired	100	2%	25,000	Rockwell H59	———	0	———	0	0000000	000000
	1 1/2"	0.000" to 0.015"	Gray	72	2,010	Unfired	100	2%	25,000	Rockwell H59	———	0	———	0	0000000	000000
	2"	0.000" to 0.015"	Gray	72	2,010	Unfired	100	2%	25,000	Rockwell H59	———	0	———	0	0000000	000000


	2 1/2"	0.000" to 0.015"	Gray	72	2,010	Unfired	100	2%	25,000	Rockwell H59	———	0	———	0	0000000	000000
	3"	0.000" to 0.015"	Gray	72	2,010	Unfired	100	2%	25,000	Rockwell H59	———	0	———	0	0000000	000000
	3 1/2"	0.000" to 0.015"	Gray	72	2,010	Unfired	100	2%	25,000	Rockwell H59	———	0	———	0	0000000	000000
	4"	0.000" to 0.015"	Gray	72	2,010	Unfired	100	2%	25,000	Rockwell H59	———	0	———	0	00000000	00000000
	5"	0.000" to 0.015"	Gray	72	2,010	Unfired	100	2%	25,000	Rockwell H59	———	0	———	0	0000000	00000000