Carbon Foam | McMaster-Carr

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	Material Material

Carbon

Graphite

	System of Measurement System of Measurement

Inch

	Thickness Thickness

	Width Width

12"

24"

	Length Length

12"

24"

	Maximum Temperature Maximum Temperature

500° F or greater

	Pores Per Inch Pores Per Inch

100

	Shape Shape


Made to Order	Sheet and Bar

	Tensile Strength Tensile Strength

30 psi

40 psi

50 psi

	Texture Texture

	Coarse

	Flow Rating Flow Rating

Low

High

Medium

	Minimum Temperature Minimum Temperature

-250° F or less

Not Rated

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

DFARS Specialty Metals
COTS-Exempt

	REACH (Registration, Evaluation, Authorization and Restriction of Chemicals) REACH (Registration, Evaluation, Authorization and Restriction of Chemicals)

REACH Compliant

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

RoHS Compliant

	Color Color

	Black
	Gray

	Surface Resistivity Surface Resistivity

1.96 × 10^-2
ohms/sq.

3.94 × 10^-2
ohms/sq.

7.87 × 10^-2
ohms/sq.

	Electrical Properties Electrical Properties

Conductive

	Performance Properties Performance Properties

Chemical Resistant

	Compressive Strength Compressive Strength

200 psi

	Hardness Hardness

Knoop 2500

	Maximum Pressure Maximum Pressure

2,000 psi

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32 Products

Made-to-Order High-Temperature Graphite Gaskets

When you need a unique shape or size graphite gasket, we will precision cut one for you using your DXF file. This material, also known as Hochdruck, is graphite with stainless steel layers for added strength in hot environments.

First select a thickness, then select a sheet size that’s large enough to accommodate your gasket. Gasket cross section and bolt hole diameter must be at least 0.187". Finally, send us your DXF file. Depending on the size of your gasket, we’ll send you as many same-design gaskets as a sheet will yield, up to 20 gaskets for 12"×12" sheets, and up to 40 gaskets for 24"×24" sheets.

				12" × 12"		24" × 24"
Thick.	Max. Pressure, psi	Temperature Range, °F	Color		Each		Each
1/16"	2,000	-400° to 850°	Black	0000000	0000000	0000000	0000000
1/8"	2,000	-400° to 850°	Black	0000000	000000	0000000	000000

Porous Conductive Carbon

Low Flow

Medium Flow

High Flow

Color: Gray
Max. Temperature: 600° F
Tensile Strength: See table
Electrical Properties: Conductive
Surface Resistivity: See table

Often used in filtering, this brittle, glass-like carbon has pores that allow fluid and air to flow through. Its low surface resistivity also makes it a good electrical conductor. This material is also temperature and chemical resistant.

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

				3" × 3"		6" × 6"
Thick.	Tensile Strength, psi	Surface Resistivity	Texture		Each		Each
Low Flow (100 Pores Per Inch)
1/4"	50	7.87 × 10^-2 ohms/sq.	Coarse	00000000	000000	00000000	000000
1/2"	50	3.94 × 10^-2 ohms/sq.	Coarse	00000000	00000	00000000	000000
1"	50	1.96 × 10^-2 ohms/sq.	Coarse	00000000	000000	00000000	000000
Medium Flow (60 Pores Per Inch)
1/4"	40	7.87 × 10^-2 ohms/sq.	Coarse	00000000	00000	00000000	00000
1/2"	40	3.94 × 10^-2 ohms/sq.	Coarse	00000000	00000	00000000	000000
1"	40	1.96 × 10^-2 ohms/sq.	Coarse	00000000	000000	00000000	000000
High Flow (20 Pores Per Inch)
1/4"	30	7.87 × 10^-2 ohms/sq.	Coarse	00000000	00000	00000000	00000
1/2"	30	3.94 × 10^-2 ohms/sq.	Coarse	00000000	00000	00000000	000000
1"	30	1.96 × 10^-2 ohms/sq.	Coarse	00000000	000000	00000000	000000

High-Temperature Acid-Resistant Silicon-Carbide Ceramic Foam

Color: Gray
Maximum Temperature: 3,000° F
Compressive Strength: 200 psi

A silicon carbide coating over a carbon foam base combines the hardness, chemical resistance, and high temperatures silicon carbide is known for with the lightweight versaitility of foam. It’s often used for cores in composite layers and to filter molten metal and corrosive liquids.

The silicon carbide coating acts as a thermal conductor, transferring heat to quickly cool liquids that pass through. Known for its hardness, silicon carbide won’t break down from repeated abrasion. However, because it’s so hard, this material is more brittle than plain carbon foam and less impact resistant than balsa wood, PET, and PVC foam cores.

Acids and bases can’t penetrate the silicon carbide coating, even at high temperatures. Instead, contaminants stick to the surface, making it a great filter for corrosive liquids and environmental pollutants such as exhaust. If using this material as a filter, choose a foam with more pores per inch for a slower flow rate, and a foam with fewer pores per inch for a faster flow rate.

If you cut this material, the underlying carbon foam is exposed. Carbon foam does not have the temperature range and chemical resistance of its silicon carbide coating, so it will break down more quickly at exposed points.

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

			3" × 3"		6" × 6"
Thickness	Thickness Tolerance	Pores Per Inch		Each		Each
1/8"	-0.010" to 0.010"	60	00000000	0000000	00000000	0000000
1/8"	-0.010" to 0.010"	100	00000000	000000	00000000	000000
1/4"	-0.010" to 0.010"	20	00000000	000000	00000000	00000000
1/4"	-0.010" to 0.010"	60	00000000	000000	00000000	00000000
1/4"	-0.010" to 0.010"	100	00000000	000000	00000000	00000000