2 1/4" Aluminum Sheets | McMaster-Carr

With a higher chromium content than 15-5 PH stainless steel, this high-strength 17-4 PH offers better corrosion resistance. It is also known as 630 stainless steel. This material maintains its corrosion resistance in temperatures up to 1100° F.

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Bars

Yield Strength: 170,000 psi
Hardness: Rockwell C30 (Hard)
Heat Treatment: Annealed (Softened)
Heat Treatable: Yes
Max. Hardness After Heat Treatment: Rockwell C45
Specifications Met: ASTM A564, SAE AMS5643

2 1/4" Thick. (-0.031" to 0.062" Tolerance)
Wd.	Fabrication	Magnetic Properties		1/2 ft. Lg.	1 ft. Lg.	2 ft. Lg.	3 ft. Lg.	6 ft. Lg.
2 1/4"	Hot Rolled	Magnetic	00000000	0000000	0000000	0000000	0000000	000000000

Multipurpose 6061 Aluminum Sheets and Bars

The most widely used aluminum, 6061 is fabricated into everything from pipe fittings and containers to automotive and aerospace parts. It is strong and corrosion resistant, plus it's easy to machine and weld.

Extruded sheets and bars are formed by a die for close-tolerance widths, then cut to the lengths listed.

Aluminum that meets ASTM B209 or ASTM B221 complies with standards for materials.

Aluminum that meets an SAE AMS standard conforms to the material and process needs of the aerospace industry.

If you don’t see the sheet or bar size you need, please specify dimensions under additional sheet sizes or additional bar lengths.

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

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Bars

Yield Strength: 35,000 psi
Hardness: Brinell 95 (Soft)
Temper: See table
Fabrication: See table
Specifications Met: See table

2 1/4" Thick.
Wd.	Thick. Tolerance	Fabrication	Temper	Heat Treatment	Temp. Range, °F	Specifications Met		1/2 ft. Lg.	1 ft. Lg.	2 ft. Lg.	3 ft. Lg.	6 ft. Lg.	8 ft. Lg.
2 1/4"	-0.024" to 0.024"	Extruded	T6511	Hardened	-320° to 300°	ASTM B221, SAE AMS QQ-A-200/8	0000000	000000	000000	0000000	0000000	0000000	0000000

Oversized Multipurpose 6061 Aluminum Sheets

Yield Strength: 35,000 psi
Hardness: Brinell 95 (Soft)
Temper: T651
Fabrication: Hot Rolled
Specifications Met: ASTM B209

The thickness is oversized to allow for finishing to exact requirements. The most widely used aluminum, 6061 is fabricated into everything from pipe fittings and containers to automotive and aerospace parts. It is strong and corrosion resistant, plus it's easy to machine and weld.

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Certificates with a traceable lot number are available for these products. Download certificates from ORDER HISTORY after your order ships.

Thick.	Thick. Tolerance	Heat Treatment	Temperature Range, °F		2" × 24"	4" × 24"	6” × 6”	6” × 12”	8" × 8"	12” × 12”	12” × 24”	18" × 18"	24” × 24”
2 1/4"	0" to 0.060"	Hardened	-320° to 210°	00000000	0000000	0000000	0000000	0000000	0000000	0000000	0000000	0000000	000000000

High-Strength 2024 Aluminum Sheets and Bars

While 2024 aluminum was initially designed for structural components in aircraft, it's now widely used when a high strength-to-weight ratio is needed, such as for gears, shafts, and fasteners. It offers similar performance to 7075 aluminum, but it’s not as strong.

Cold-drawn bars are formed by a die for close-tolerance widths, then cut to the lengths listed.

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

Certificates with a traceable lot number are available for these products. Download certificates from ORDER HISTORY after your order ships.

Bars

Yield Strength: 47,000 psi
Hardness: Brinell 120 (Medium)
Fabrication: Cold Drawn
Temper:
1/8" to 3/8" thick. bars: T4
All other sizes: T351
Specifications Met: ASTM B211

2 1/4" Thick. (-0.008" to 0.008" Tolerance)
Wd.	Heat Treatment	Temperature Range, °F		1/2 ft. Lg.	1 ft. Lg.	2 ft. Lg.	3 ft. Lg.	6 ft. Lg.
2 1/4"	Hardened	-320° to 300°	00000000	0000000	0000000	0000000	0000000	0000000

Fatigue-Resistant 7050 Aluminum

Yield Strength: 68,000 psi
Hardness: Not Rated
Temper: T7451
Fabrication: Cold Rolled
Specifications Met: ASTM B594, SAE AMS4050

Substitute 7050 aluminum for 7075 in structural applications when high stress-corrosion resistance is required. It is the same material that's used for bulkheads and fuselage frames. These sheets are ultrasonically inspected (USI) for defects below the surface as per ASTM B594.

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Thick.	Thick. Tolerance	Heat Treatment		6” × 6”	12" × 12"
2 1/4"	-0.055" to 0.055"	Hardened	0000000	0000000	0000000

Easy-to-Machine MIC6 Cast Aluminum Sheets and Bars

Yield Strength: 15,000 psi
Hardness: Brinell 65 (Soft)
Temper: Not Rated
Fabrication: Cast

MIC6 is cast from a high-strength 7000-series aluminum, then stress relieved to maintain dimensional stability during high-speed machining. Use these sheets and bars for CNC routing tables, assembly jigs, vacuum chucks, and other applications where consistent flatness and tight tolerances are critical.

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Certificates with a traceable lot number are available for these products. Download certificates from ORDER HISTORY after your order ships.

Sheets

6" × 6"
Thick.	Thick. Tolerance	Heat Treatment	Flatness Tolerance		Each
2 1/4"	-0.005" to 0.005"	Stress Relieved	0.005"	00000000	0000000
6" × 12"
2 1/4"	-0.005" to 0.005"	Stress Relieved	0.005"	000000000	000000
6" × 24"
2 1/4"	-0.005" to 0.005"	Stress Relieved	0.005"	000000000	000000
8" × 8"
2 1/4"	-0.005" to 0.005"	Stress Relieved	0.005"	000000000	000000
12" × 12"
2 1/4"	-0.005" to 0.005"	Stress Relieved	0.005"	00000000	000000
12" × 24"
2 1/4"	-0.005" to 0.005"	Stress Relieved	0.005"	000000000	000000
12" × 48"
2 1/4"	-0.005" to 0.005"	Stress Relieved	0.005"	000000000	00000000
18" × 18"
2 1/4"	-0.005" to 0.005"	Stress Relieved	0.005"	000000000	000000
24" × 24"
2 1/4"	-0.005" to 0.005"	Stress Relieved	0.005"	00000000	00000000
24" × 72"
2 1/4"	-0.005" to 0.005"	Stress Relieved	0.005"	00000000	00000000

Multipurpose 4140 Alloy Steel Bars

Yield Strength: 60,000 psi
Hardness: Rockwell B90 (Medium)
Heat Treatable: Yes
Max. Hardness After Heat Treatment: Rockwell C60
Specifications Met: ASTM A108

Also known as chrome-moly steel, this versatile 4140 alloy steel is used for a wide range of parts, such as gears, axles, shafts, collets, and die holders. It resists fracturing from repeated stress.

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Certificates with a traceable lot number are available for these products. Download certificates from ORDER HISTORY after your order ships.

2 1/4" Thick.
Wd.	Heat Treatment	Straightness Tolerance		1/2 ft. Lg.	1 ft. Lg.	2 ft. Lg.	3 ft. Lg.	6 ft. Lg.
2 1/4"	Annealed (Softened)	3/16" per 10 ft.	0000000	000000	0000000	0000000	0000000	0000000

					3" Lg.
Thick.	Thick. Tolerance	Wd.	Heat Treatment	Straightness Tolerance		Each
2 1/4"	-0.007" to 0"	2 1/4"	Annealed (Softened)	3/16" per 10 ft.	00000000	000000

Low-Carbon Steel Sheets and Bars

Also known as mild steel, low-carbon steel is easy to machine, form, and weld. It's widely fabricated into parts that don’t require high strength, such as fixture clamps, mounting plates, and spacers. Some of this material can be surface hardened with heat treating.

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Bars

Yield Strength: 54,000 psi
Hardness: Rockwell B70 (Medium)
Heat Treatable: Yes
Max. Hardness After Heat Treatment: Rockwell C60
Specifications Met: ASTM A108

2 1/4" Thickness (-0.006" to 0" Tolerance)
Wd.		1/2 ft. Lg.	1 ft. Lg.	2 ft. Lg.	3 ft. Lg.	6 ft. Lg.
2 1/4"	00000000	000000	000000	0000000	0000000	0000000
3"	00000000	00000	000000	000000	000000	000000
3 1/2"	00000000	00000	000000	000000	000000	000000
4"	00000000	00000	000000	000000	000000	000000

Ultra-Machinable 12L14 Carbon Steel Bars

Yield Strength: 60,000 psi
Hardness: Rockwell B85 (Medium)
Heat Treatable: Yes
Max. Hardness After Heat Treatment: Rockwell C60
Specifications Met: ASTM A108

The lead additive acts as a lubricant, which allows 12L14 carbon steel to withstand very fast machining. It's used to fabricate a wide variety of machine parts.

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Certificates with a traceable lot number are available for these products. Download certificates from ORDER HISTORY after your order ships.

Thick.	Thick. Tolerance	Wd.	Heat Treatment		1 ft. Lg.	3 ft. Lg.	6 ft. Lg.
2 1/4"	-0.004" to 0"	2 1/4"	Annealed (Softened)	0000000	0000000	0000000	0000000

Easy-to-Machine Impact-Resistant Ductile Cast Iron Bars

Yield Strength: 45,000 psi
Hardness: Rockwell C10 (Medium)
Heat Treatable: Yes
Max. Hardness After Heat Treatment: Rockwell C50
Specifications Met: ASTM A536

Easier to machine without cracking than other impact-resistant ductile cast iron bars, these cast iron bars contain a high amount of ferrite. Use them to make cylinder and die blocks, rotary tables, and rail spacers. These bars are also known as 65-45-12 ductile iron bars. All conduct electricity. They will become magnetic if exposed to a magnetic field. They’re often used to replace low and medium carbon steel bars.

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Certificates with a traceable lot number are available for these products. Download certificates from ORDER HISTORY after your order ships.

2 1/4" Thick. (0" to 0.25" Tolerance)
Width		1 ft. Lg.	2 ft. Lg.
4 1/4"	0000000	0000000	0000000

Ultra-Machinable 360 Brass Bars

Yield Strength: 15,000 psi
Hardness: Rockwell B35 (Soft)
Temper: H02 (1/2 Hard)
Heat Treatable: No
Specifications Met: ASTM B16

With the highest lead content of all the brass alloys, 360 offers the best machinability. Often called free-machining and free-cutting brass, it stands up to high-speed drilling, milling, and tapping operations with minimal wear on your tools. It’s commonly used for gears, pinions, and lock components.

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2 1/4" Thick. (-0.014" to 0.014" Tolerance)
Wd.		1/2 ft. Lg.	1 ft. Lg.	2 ft. Lg.	3 ft. Lg.	6 ft. Lg.
2 1/4"	0000000	0000000	0000000	0000000	0000000	000000000

Wear-Resistant Easy-to-Machine Delrin® Acetal Resin Sheets, Bars, and Strips

These sheets, bars, and strips resist expanding when exposed to heat and moisture, so they can be easily machined to close tolerances. They also have a naturally slippery, wear-resistant surface. Use them to make precision gears, bushings, and bearings. Delrin® acetal resin, also known as acetal homopolymer, is stronger and stiffer than acetal copolymer.

White sheets, bars, and strips are FDA compliant for contact with food.

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

Sheets

Color: White or Black
Temperature Range: -20° to 180° F
Tensile Strength: 10,000-11,000 psi (Good)
Impact Strength: 1-1.5 ft.-lbs./in. (Poor)
Hardness: Rockwell R120-R122 (Hard)
For Use Outdoors: No
Specifications Met:
White: ASTM D6100, FDA Compliant 21 CFR 177.2480, NSF/ANSI 51, NSF/ANSI 61
Black: ASTM D6100

		White		Black
Thick.	Thick. Tolerance		Each		Each
6" × 6"
2 1/4"	0" to 0.05"	00000000	0000000	00000000	0000000
12" × 12"
2 1/4"	0" to 0.05"	00000000	000000	00000000	000000
12" × 24"
2 1/4"	0" to 0.05"	00000000	000000	00000000	000000
12" × 48"
2 1/4"	0" to 0.05"	00000000	00000000	00000000	00000000
24" × 24"
2 1/4"	0" to 0.05"	00000000	00000000	00000000	00000000
24" × 48"
2 1/4"	0" to 0.05"	00000000	00000000	00000000	00000000

Wear-Resistant Easy-to-Machine Acetal Sheets and Bars

Color: White or Black
Temperature Range: -20° to 180° F
Tensile Strength: 9,135-9,700 psi (Good)
Impact Strength: 1-1.5 ft.-lbs./in. (Poor)
Hardness: Rockwell R120 (Hard)
For Use Outdoors: No
Specifications Met: ASTM D6100, FDA Compliant 21 CFR 177.2470

An economical alternative to Delrin® acetal resin, these acetal copolymer sheets and bars offer the same naturally slippery surface and similar wear resistance. They resist expanding when exposed to heat and moisture, so they can be machined to close tolerances. Use them for parts that require precision, such as gears, bearings, and bushings.

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

Sheets

		White		Black
Thick.	Thick. Tolerance		Each		Each
6" × 6"
2 1/4"	-0.016" to 0.025"	00000000	000000	00000000	000000
12" × 12"
2 1/4"	-0.016" to 0.025"	0000000	000000	00000000	000000
12" × 24"
2 1/4"	-0.016" to 0.025"	0000000	000000	00000000	000000
12" × 48"
2 1/4"	-0.016" to 0.025"	00000000	000000	00000000	000000
24" × 24"
2 1/4"	-0.016" to 0.025"	0000000	000000	00000000	000000

Slippery UHMW Polyethylene Sheets, Bars, and Strips

In addition to having a low-friction surface that prevents sticking and binding, this tough, impact- and wear-resistant material handles the scuffs, scrapes, and strikes that other plastics can’t. These sheets, bars, and strips are often used to make machine guards and chute liners. They are all FDA compliant for direct food contact.

If you don't see the size of white sheet you're looking for, please specify length and width under additional white sheet sizes.

Skived sheets and bars are more likely to curl than extruded and molded sheets and bars.

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

White or Black Sheets

Temperature Range: -40° to 180° F
Tensile Strength: 4,350-5,800 psi (Poor)
Impact Strength: 16.8 ft.-lbs./in. (Excellent)
Hardness: Durometer 65D-67D (Medium)
For Use Outdoors: No
Specifications Met:
White: ASTM D4020, ASTM D6712, FDA Compliant 21 CFR 177.1520, UL 94 HB
Black: ASTM D4020, ASTM D6712, FDA Compliant 21 CFR 177.1520, FDA Compliant 21 CFR 178.2010, FDA Compliant 21 CFR 178.3297, UL 94 HB

			White		Black
Thick.	Thickness Tolerance	Fabrication		Each		Each
6" × 6"
2 1/4"	-0.12" to 0.12"	Extruded	00000000	000000	000000	00
6" × 12"
2 1/4"	-0.12" to 0.12"	Extruded	00000000	00000	00000000	000000
12" × 12"
2 1/4"	-0.12" to 0.12"	Extruded	00000000	000000	00000000	000000
12" × 24"
2 1/4"	-0.12" to 0.12"	Extruded	00000000	000000	00000000	000000
12" × 36"
2 1/4"	-0.12" to 0.12"	Extruded	00000000	000000	00000000	000000
24" × 24"
2 1/4"	-0.12" to 0.12"	Extruded	00000000	000000	00000000	000000

White or Black Bars

Temperature Range: -20° to 180° F
Tensile Strength: 4,350-5,800 psi (Poor)
Impact Strength: 16.8 ft.-lbs./in. (Excellent)
Hardness: Durometer 65D-67D (Medium)
For Use Outdoors: No
Specifications Met: See Table

				White		Black
Wd.	Lengths, ft.	Fabrication	Specifications Met		Per Ft.		Per Ft.
2 1/4" Thick. (-0.125" to 0.125")
2 1/4"	1, 2, 3, 4, 5	Skived	ASTM D4020 ASTM D6712 FDA Compliant 21 CFR 177.1520 ISO 11542-1 ISO 11542-2 MIL-P-21922 MIL-P-23536	0000000	000000	00000000	000000

Super-Cushioning Polyurethane Foam Sheets, Bars, Cubes, and Strips

Durable enough to be used in seat cushions, this flexible polyurethane foam provides gentle cushioning support. Use these sheets, bars, cubes, and strips in packaging applications to absorb shock and damp vibration. Foam has open-cell construction, which allows water, air, and gases to be absorbed.

Square Bars with Smooth Texture

Color: Gray
Temperature Range: -20° to 180° F
Cell Type: Open
For Use Outdoors: No
Density: 1 lbs./cu. ft.
Pressure to Compress 25%: 0.3 psi (Ultra Soft)
Tensile Strength Rating: Fair
Oil-Resistance Rating: Not Rated

Thick.	Thick. Tolerance	Wd.	Lg.		Each
2 1/4"	-0.063" to 0.063"	2 1/4"	42"	00000000	00000