Alumina Silicate Sheets | McMaster-Carr

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Material

Ceramic

System of Measurement

Thickness

Width

Shape

Length

Maximum Temperature

Thermal Conductivity @ Temperature

1.265 W/(m⋅°C) @ 20° C

Color

Fabrication

Flexural Strength

RoHS

REACH

Clarity

Hardness

Minimum Temperature

Compressive Strength

Porosity

Tensile Strength

2,500 psi

Dielectric Strength

100 V/mil

DFARS Specialty Metals

Exempt

Density

0.09 lb/in³

Export Control Classification Number (ECCN)

EAR99

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28 Products

About Composites

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

Low Thermal Expansion Alumina Silicate Ceramic Sheets and Bars

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.

Sheets

			Temp., ° F							4" × 4"		6" × 6"		9 1/2" × 9 1/2"
Thk.	Thk. Tolerance	Color	Min.	Max.	Fabrication	Dielectric Strength, V/mil	Porosity	Compressive Strength, psi	Hardness		Each		Each		Each



	1/8"	-0.010" to 0.010"	Gray	72	2,010	Unfired	100	2%	25,000	Rockwell H59	0000000	000000	0000000	000000	00000000	0000000


	1/4"	-0.010" to 0.010"	Gray	72	2,010	Unfired	100	2%	25,000	Rockwell H59	0000000	00000	0000000	000000	00000000	000000
	3/8"	-0.010" to 0.010"	Gray	72	2,010	Unfired	100	2%	25,000	Rockwell H59	0000000	00000	0000000	000000	00000000	000000
	1/2"	-0.010" to 0.010"	Gray	72	2,010	Unfired	100	2%	25,000	Rockwell H59	0000000	00000	0000000	000000	0000000	000000
	3/4"	-0.010" to 0.010"	Gray	72	2,010	Unfired	100	2%	25,000	Rockwell H59	0000000	000000	00000000	000000	0000000	000000
	1"	-0.010" to 0.010"	Gray	72	2,010	Unfired	100	2%	25,000	Rockwell H59	0000000	000000	00000000	000000	0000000	000000
	1 1/2"	-0.010" to 0.010"	Gray	72	2,010	Unfired	100	2%	25,000	Rockwell H59	0000000	000000	00000000	000000	0000000	000000
	2"	-0.010" to 0.010"	Gray	72	2,010	Unfired	100	2%	25,000	Rockwell H59	0000000	000000	00000000	000000	0000000	000000

Bars

			Temp., ° F							1/2" × 6"		3/4" × 6"		1" × 6"		2" × 6"
Thk.	Thk. Tolerance	Color	Min.	Max.	Fabrication	Dielectric Strength, V/mil	Porosity	Compressive Strength, psi	Hardness		Each		Each		Each		Each



	1/2"	0.000" to 0.020"	Gray	72	2,010	Unfired	100	2%	25,000	Rockwell H59	0000000	000000	———	0	———	0	———	0


	3/4"	0.000" to 0.020"	Gray	72	2,010	Unfired	100	2%	25,000	Rockwell H59	———	0	0000000	000000	———	0	———	0
	1"	0.000" to 0.020"	Gray	72	2,010	Unfired	100	2%	25,000	Rockwell H59	———	0	———	0	0000000	000000	———	0
	2"	0.000" to 0.020"	Gray	72	2,010	Unfired	100	2%	25,000	Rockwell H59	———	0	———	0	———	0	0000000	0000000