Porous Sheets | McMaster-Carr

Filter by

Shape

System of Measurement

Thickness

Width

Length

Material

Silicon Carbide Ceramic

Maximum Temperature

Construction

Performance

Removes Particle Size Down To

Environment

Color

Airflow @ Surface Area

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

Yes

REACH

Compliant

Not Compliant

Export Control Classification Number (ECCN)

EAR99

RoHS

Compliant

DFARS Specialty Metals

Hardness

Application

Thermoforming Molding

Enclosure Rating

Hardness Rating

Pores per Inch

Yield Strength

Flow Rating

Tensile Strength

57 Products

PTFE Sintered Filter Film

Shield vents on electronic and automotive equipment, such as cell phone microphones, from water, dirt, and debris without blocking them entirely. This film has tiny holes to let air, gas, and vapors pass through. Because it’s made of PTFE, it wicks away water. It also won’t react with most chemicals, though it can break down from alkali metal and high-temperature fluorinated agents. IP rated, this film stands up to dust, weather, washdowns, and even brief submersion.

							13" × 39 1/2"
Thk.	Removes Particle Size Down To, μm	Airflow @ Surface Area	Enclosure Rating	Color	Max. Temp., ° F	Specs. Met		Each



	0.007"	0.4	3.8 ft³/min @ 1 in²	IP67	White	500	UL 746C	5334N11	0000000


	0.01"	0.1	0.2 ft³/min @ 1 in²	IP66, IP68	White	500	UL 746C	5334N13	000000
	0.01"	0.1	1.8 ft³/min @ 1 in²	IP65, IP68	White	500	UL 746C	5334N12	000000

Air-Permeable Mold-Quality Metapor Aluminum Sheets

Create vacuum-forming and thermoforming molds without vacuum channels or holes. The pores in Metapor aluminum evenly distribute a vacuum and release air and moisture, so bubbles and blemishes won’t form. You need to mill the aluminum to expose the pores.

Temper Designation	Porosity	Pore Dia.		Each







10 mm Thick (-2 mm to 2 mm Tolerance)

150	150	Cast	Not Rated	15%	0.0006"	8189K52	0000000


250	250	Cast	Not Rated	15%	0.0006"	8189K32	000000
500	500	Cast	Not Rated	15%	0.0006"	8189K51	000000




		15 mm Thick (-2 mm to 2 mm Tolerance)

		150	150	Cast	Not Rated	15%	0.0006"	8189K54	000000


		250	250	Cast	Not Rated	15%	0.0006"	8189K529	000000
		500	500	Cast	Not Rated	15%	0.0006"	8189K53	000000




				30 mm Thick (-2 mm to 2 mm Tolerance)

				150	150	Cast	Not Rated	15%	0.0006"	8189K56	000000


				250	250	Cast	Not Rated	15%	0.0006"	8189K31	000000
				500	500	Cast	Not Rated	15%	0.0006"	8189K57	00000000




						50 mm Thick (-2 mm to 2 mm Tolerance)

						150	150	Cast	Not Rated	15%	0.0006"	8189K58	000000


						250	250	Cast	Not Rated	15%	0.0006"	8189K34	000000
						500	500	Cast	Not Rated	15%	0.0006"	8189K63	00000000

PTFE Adhesive-Back Sintered Filter Discs

Stick these discs onto breather and other circular vents to guard against water and dirt without obstructing flow. Often used in the electronic and automotive industries, they have very small holes so air, gas, and vapor can still pass through. These discs are made of PTFE to wick water away. They also won’t break down from most chemicals, except alkali metal and high-temperature fluorinated agents.

IP rated except for their adhesive, all seal out dust and stand up to some submersion.

IP65 Enclosure Rating—IP65-rated discs also handle low-pressure washdowns.

IP66 Enclosure Rating—IP66-rated discs withstand high-pressure washdowns.

					Adhesive							Pkg. of 50		Pkg. of 100
	Thk.	Overall Thk.	Removes Particle Size Down To, μm	Airflow @ Surface Area	ID	Location	Material	Thk.	Enclosure Rating	Color	Max. Temp., ° F		Pkg.		Pkg.
1/2" Diameter



		0.007"	0.015"	0.4	0.28 ft³/min @ 1 in²	9/32"	Edge	Acrylic Plastic	0.008"	IP67	White	250	4035N11	000000	4035N12	000000


		0.01"	0.018"	0.1	0.01 ft³/min @ 1 in²	9/32"	Edge	Acrylic Plastic	0.008"	IP66, IP68	White	250	4035N31	00000	4035N32	00000
		0.01"	0.018"	0.1	0.09 ft³/min @ 1 in²	9/32"	Edge	Acrylic Plastic	0.008"	IP65, IP68	White	250	4035N21	00000	4035N22	00000

Aluminum Foam

Small Cell

Large Cell

Injected with air during casting, aluminum foam is even lighter than solid aluminum and has a crater-like appearance. It’s often installed as sound insulation and on the exterior of buildings.

To machine aluminum foam, you’ll need a carbide- or diamond-tipped blade. Diamond blades cut more easily and last longer than carbide ones.

Small Cell—Dense and stiff, this foam is best for high-performance acoustic panels and sturdy, decorative elements. It's _1/6 the weight of solid aluminum.

Large Cell—Our lightest aluminum foam due to its low density. It's _1/3 the weight of small-cell foam and _1/20 the weight of solid aluminum. Since light peeks through the holes, it's often used to build architectural light diffusers.

					6" × 6"		12" × 12"
	Thk.	Thk. Tolerance	Fabrication	Specs. Met		Each		Each
Small Cell



		1/2"	-0.039" to 0.039"	Cast	ASTM B557, ASTM E9	9236T216	000000	9236T212	000000


		1"	-0.039" to 0.039"	Cast	ASTM B557, ASTM E9	9236T416	00000	9236T412	000000


		Large Cell



				1"	-0.039" to 0.039"	Cast	ASTM B557, ASTM E9	9236T316	00000	9236T312	00000


				1.7"	-0.039" to 0.039"	Cast	ASTM B557, ASTM E9	9236T516	00000	9236T512	00000

High-Temperature Acid-Resistant Silicon-Carbide Ceramic Foam

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.

						3" × 3"		6" × 6"
Thk.	Thk. Tolerance	Pores per In.	Color	Max. Temp., ° F	Compressive Strength, psi		Each		Each
1/8"	-0.010" to 0.010"	60	Gray	3,000	200	6716N112	0000000	6716N115	0000000
1/8"	-0.010" to 0.010"	100	Gray	3,000	200	6716N111	000000	6716N114	000000
1/4"	-0.010" to 0.010"	20	Gray	3,000	200	6716N119	000000	6716N123	00000000
1/4"	-0.010" to 0.010"	60	Gray	3,000	200	6716N118	000000	6716N122	00000000
1/4"	-0.010" to 0.010"	100	Gray	3,000	200	6716N117	000000	6716N121	00000000

Porous Conductive Carbon


Low Flow	Medium Flow	High Flow

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.

								3" × 3"		6" × 6"
	Thk.	Thk. Tolerance	Tensile Strength, psi	Surface Resistivity, ohm/sq.	Texture	Color	Max. Temp., ° F		Each		Each
Low Flow (100 Pores per Inch)



		1/4"	0.00" to 0.03"	50	7.87 × 10^-2	Rough	Gray	600	3947K113	000000	3947K143	0000000


		1/2"	0.00" to 0.03"	50	3.94 × 10^-2	Rough	Gray	600	3947K123	00000	3947K153	000000
		1"	0.00" to 0.03"	50	1.96 × 10^-2	Rough	Gray	600	3947K133	000000	3947K163	000000


		Medium Flow (60 Pores per Inch)



				1/4"	0.00" to 0.03"	40	7.87 × 10^-2	Rough	Gray	600	3947K112	00000	3947K142	000000


				1/2"	0.00" to 0.03"	40	3.94 × 10^-2	Rough	Gray	600	3947K122	00000	3947K152	000000
				1"	0.00" to 0.03"	40	1.96 × 10^-2	Rough	Gray	600	3947K132	000000	3947K162	000000


				High Flow (20 Pores per Inch)



						1/4"	0.00" to 0.03"	30	7.87 × 10^-2	Rough	Gray	600	3947K111	00000	3947K141	000000


						1/2"	0.00" to 0.03"	30	3.94 × 10^-2	Rough	Gray	600	3947K121	00000	3947K151	000000
						1"	0.00" to 0.03"	30	1.96 × 10^-2	Rough	Gray	600	3947K131	000000	3947K161	000000