Boron Nitride Bars | McMaster-Carr

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	Material Material	Show

Ceramic

Boron-Nitride Ceramic

	Material Material	Hide

	Shape Shape

	Sheet and Bar
	Rod and Disc

	System of Measurement System of Measurement

Inch

	Length Length

1 ft.

	Thickness Thickness

	Width Width

	Diameter Diameter

	Thermal Conductivity Thermal Conductivity

319 Btu/hr. × in./sq. ft./°F @
212° F

	Color Color

	White

	Dielectric Strength Dielectric Strength

1,270 V/mil

	Maximum Temperature Maximum Temperature

1,000° to 1,999° F

	Electrical Properties Electrical Properties

Electrical Insulating

	Fabrication Fabrication

Sintered

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

DFARS Specialty Metals
COTS-Exempt

	Compressive Strength Compressive Strength

16,000 psi

	Modulus of Elasticity Modulus of Elasticity

0.091 ksi × 10⁶

	RoHS (Restriction of Hazardous Substances) RoHS (Restriction of Hazardous Substances)

RoHS Compliant

	Density Density

0.076 lbs./cu. in.

	Porosity Porosity

	Flexural Strength Flexural Strength

11,000 psi

	Clarity Clarity

Opaque

	Minimum Temperature Minimum Temperature

32° F

	Hardness Hardness

38 Products

Electrical-Insulating Boron-Nitride Ceramic Sheets and Bars

Color: White
Temperature Range: 32° F to 1,020° F
Fabrication: Sintered
Electrical Properties: Electrical Insulating
Dielectric Strength: 1,270 V/mil
Porosity: 7%
Compressive Strength: 16,000 psi

Also known as white graphite, boron-nitride ceramic is an excellent electrical insulator that is often used in high-temperature, high-power electrical applications, such as arc welding and semiconductor equipment. It's a low-friction material with a slippery feel.

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

Sheets

Thick.	Thick. Tolerance	Wd.	Lg.		Each
1/16"	-0.010" to 0.010"	3"	5"	00000000	0000000
1/8"	-0.010" to 0.010"	5"	6"	00000000	000000
1/4"	-0.010" to 0.010"	5"	12"	00000000	000000
3/8"	-0.010" to 0.010"	5"	6"	00000000	000000
3/8"	-0.010" to 0.010"	5"	12"	00000000	000000
1/2"	-0.010" to 0.010"	5"	12"	00000000	000000

Bars

			6" Lg.		12" Lg.
Thick.	Thick. Tolerance	Wd.		Each		Each
1/8"	-0.010" to 0.010"	1/8"	00000000	000000	00000000	000000
1/4"	-0.010" to 0.010"	1/4"	00000000	00000	00000000	000000
3/8"	-0.010" to 0.010"	3/8"	00000000	00000	00000000	000000
1/2"	-0.010" to 0.010"	1/2"	00000000	00000	00000000	000000
3/4"	-0.010" to 0.010"	3/4"	00000000	000000	00000000	000000
1"	-0.010" to 0.010"	1"	00000000	000000	00000000	000000
1 1/2"	-0.010" to 0.010"	1 1/2"	00000000	000000	00000000	000000
2"	-0.010" to 0.010"	2"	00000000	000000	00000000	00000000

Electrical-Insulating Boron-Nitride Ceramic Rods

Color: White
Temperature Range: 32° F to 1,020° F
Electrical Properties: Electrical Insulating
Dielectric Strength: 1,270 V/mil
Porosity: 7%
Compressive Strength: 16,000 psi

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

		6" Lg.		12" Lg.
Dia.	Dia. Tolerance		Each		Each
1/8"	0.000" to 0.020"	00000000	000000	00000000	000000
1/4"	0.000" to 0.020"	00000000	00000	00000000	000000
3/8"	0.000" to 0.020"	00000000	00000	00000000	000000
1/2"	0.000" to 0.020"	00000000	000000	00000000	000000
3/4"	0.000" to 0.020"	00000000	000000	00000000	000000
1"	0.000" to 0.020"	00000000	000000	00000000	000000
1 1/4"	0.000" to 0.020"	00000000	000000	00000000	000000
1 1/2"	0.000" to 0.020"	00000000	000000	00000000	000000