1 1/4" Aluminum Plates | McMaster-Carr

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81 Products

About Aluminum

Compare over 20 aluminum alloys to find the right material for you—all with material certificates for traceability.

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.

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

Sheets

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

2" × 48"
Thick.	Thick. Tolerance	Fabrication	Temper	Heat Treatment	Temp. Range, °F	Specifications Met		Each
1 1/4"	-0.012" to 0.012"	Extruded	T6511	Hardened	-320° to 300°	ASTM B221, SAE AMS QQ-A-200/8	00000000	000000
4" × 48"
1 1/4"	-0.012" to 0.012"	Extruded	T6511	Hardened	-320° to 300°	ASTM B221, SAE AMS QQ-A-200/8	00000000	000000
6" × 48"
1 1/4"	-0.012" to 0.012"	Extruded	T6511	Hardened	-320° to 300°	ASTM B221, SAE AMS QQ-A-200/8	00000000	000000
8" × 8"
1 1/4"	-0.012" to 0.012"	Extruded	T6511	Hardened	-320° to 300°	ASTM B221, SAE AMS QQ-A-200/8	0000000	00000
12" × 12"
1 1/4"	-0.012" to 0.012"	Extruded	T6511	Hardened	-320° to 300°	ASTM B221, SAE AMS QQ-A-200/8	0000000	000000
12" × 48"
1 1/4"	-0.012" to 0.012"	Extruded	T6511	Hardened	-320° to 300°	ASTM B221, SAE AMS QQ-A-200/8	00000000	000000
12" × 72"
1 1/4"	-0.012" to 0.012"	Hot Rolled	T651	Hardened	-320° to 300°	ASTM B209, SAE AMS QQ-A-250/11	00000000	000000

Bars

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

1 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.	4 ft. Lg.	6 ft. Lg.	8 ft. Lg.
1 1/4"	-0.012" to 0.012"	Extruded	T6511	Hardened	-320° to 300°	ASTM B221, SAE AMS QQ-A-200/8	0000000	000000	000000	000000	000000	00	000000	0000000
1 1/2"	-0.012" to 0.012"	Extruded	T6511	Hardened	-320° to 210°	ASTM B221, SAE AMS QQ-A-200/8	0000000	00000	00000	00000	00000	00	000000	000000
1 3/4"	-0.012" to 0.012"	Extruded	T6511	Hardened	-320° to 210°	ASTM B221, SAE AMS QQ-A-200/8	00000000	00000	00000	00000	00000	00	000000	000000
2"	-0.012" to 0.012"	Extruded	T6511	Hardened	-320° to 210°	ASTM B221, SAE AMS QQ-A-200/8	00000000	00000	00000	00000	00000	00	000000	000000
2 1/4"	-0.012" to 0.012"	Extruded	T6511	Hardened	-320° to 210°	ASTM B221, SAE AMS QQ-A-200/8	00000000	00000	00000	00000	00000	00	000000	000000
2 1/2"	-0.012" to 0.012"	Extruded	T6511	Hardened	-320° to 210°	ASTM B221, SAE AMS QQ-A-200/8	00000000	00000	00000	00000	000000	00	000000	000000
3"	-0.012" to 0.012"	Extruded	T6511	Hardened	-320° to 210°	ASTM B221, SAE AMS QQ-A-200/8	00000000	00000	00000	00000	000000	0000000	000000	000000
3 1/2"	-0.012" to 0.012"	Extruded	T6511	Hardened	-320° to 210°	ASTM B221, SAE AMS QQ-A-200/8	00000000	00000	00000	000000	000000	00	000000	000000
4"	-0.012" to 0.012"	Extruded	T6511	Hardened	-320° to 210°	ASTM B221, SAE AMS QQ-A-200/8	00000000	00000	00000	000000	000000	00	000000	000000
4 1/2"	-0.012" to 0.012"	Extruded	T6511	Hardened	-320° to 300°	ASTM B221, SAE AMS QQ-A-200/8	00000000	00000	00000	000000	000000	00	000000	00
5"	-0.012" to 0.012"	Extruded	T6511	Hardened	-320° to 210°	ASTM B221, SAE AMS QQ-A-200/8	00000000	00000	00000	000000	000000	000000	000000	00
6"	-0.012" to 0.012"	Extruded	T6511	Hardened	-320° to 210°	ASTM B221, SAE AMS QQ-A-200/8	00000000	00000	00000	000000	000000	00	000000	00

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.

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.

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”
1 1/4"	0" to 0.047"	Hardened	-320° to 210°	00000000	000000	0000000	000000	0000000	000000	0000000	0000000	0000000	0000000

Tight-Tolerance Multipurpose 6061 Aluminum Sheets and Bars

Yield Strength: 35,000 psi
Hardness: Brinell 95 (Soft)
Temper: See table
Fabrication: See table
Specifications Met: ASTM B209

These sheets and bars are precision ground either on all six sides or just on the top and bottom. 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.

Sheets and bars that are precision ground on all sides are consistently flat, square, and parallel on all six sides. They’re also known as blanks and are ready for use in your CNC machine.

Sheets and bars that are precision ground on top and bottom are also known as flat stock.

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.

Precision Ground on All Sides
Thick.	Thick. Tolerance	Fabrication	Temper	Heat Treatment	Temperature Range, °F	Parallel Tolerance	Flatness Tolerance		Each
1/2" x 12"
1 1/4"	-0.002" to 0.002"	Cold Rolled	T651	Hardened	-320° to 300°	__	Not Rated	00000000	000000
1" x 12"
1 1/4"	-0.002" to 0.002"	Cold Rolled	T651	Hardened	-320° to 300°	__	Not Rated	00000000	00000
2" x 3"
1 1/4"	-0.002" to 0.002"	Cold Rolled	T651	Hardened	-320° to 300°	__	Not Rated	00000000	00000
2" x 4"
1 1/4"	-0.002" to 0.002"	Cold Rolled	T651	Hardened	-320° to 300°	__	Not Rated	00000000	00000
2" x 6"
1 1/4"	-0.002" to 0.002"	Cold Rolled	T651	Hardened	-320° to 300°	__	Not Rated	00000000	00000
2" x 12"
1 1/4"	-0.002" to 0.002"	Cold Rolled	T651	Hardened	-320° to 300°	__	Not Rated	00000000	00000
3" x 3"
1 1/4"	-0.002" to 0.002"	Cold Rolled	T651	Hardened	-320° to 300°	__	Not Rated	00000000	00000
3" x 6"
1 1/4"	-0.002" to 0.002"	Cold Rolled	T651	Hardened	-320° to 300°	__	Not Rated	00000000	00000
4" x 4"
1 1/4"	-0.002" to 0.002"	Cold Rolled	T651	Hardened	-320° to 300°	__	Not Rated	00000000	00000
4" x 6"
1 1/4"	-0.002" to 0.002"	Cold Rolled	T651	Hardened	-320° to 300°	__	Not Rated	00000000	00000
4" x 8"
1 1/4"	-0.002" to 0.002"	Cold Rolled	T651	Hardened	-320° to 300°	__	Not Rated	00000000	000000
4" x 12"
1 1/4"	-0.002" to 0.002"	Cold Rolled	T651	Hardened	-320° to 300°	__	Not Rated	00000000	000000
6" x 6"
1 1/4"	-0.002" to 0.002"	Cold Rolled	T651	Hardened	-320° to 300°	__	Not Rated	00000000	000000
6" x 12"
1 1/4"	-0.002" to 0.002"	Cold Rolled	T651	Hardened	-320° to 300°	__	Not Rated	00000000	000000
8" x 8"
1 1/4"	-0.002" to 0.002"	Cold Rolled	T651	Hardened	-320° to 300°	__	Not Rated	00000000	000000
8" x 12"
1 1/4"	-0.002" to 0.002"	Cold Rolled	T651	Hardened	-320° to 300°	__	Not Rated	00000000	000000
12" x 12"
1 1/4"	-0.002" to 0.002"	Cold Rolled	T651	Hardened	-320° to 300°	__	Not Rated	00000000	000000
12" x 18"
1 1/4"	-0.002" to 0.002"	Cold Rolled	T651	Hardened	-320° to 300°	__	Not Rated	00000000	000000
12" x 24"
1 1/4"	-0.002" to 0.002"	Hot Rolled	T651	Hardened	-320° to 300°	0.004"	0.005"	00000000	000000
24" x 24"
1 1/4"	-0.002" to 0.002"	Hot Rolled	T651	Hardened	-320° to 300°	0.004"	0.005"	00000000	00000000
Precision Ground on Top and Bottom
2" x 12"
1 1/4"	-0.002" to 0.002"	Hot Rolled	T651	Hardened	-320° to 300°	0.004"	0.005"	00000000	000000
2" x 24"
1 1/4"	-0.002" to 0.002"	Hot Rolled	T651	Hardened	-320° to 300°	0.004"	0.005"	00000000	000000
4" x 12"
1 1/4"	-0.002" to 0.002"	Hot Rolled	T651	Hardened	-320° to 300°	0.004"	0.005"	00000000	000000
4" x 24"
1 1/4"	-0.002" to 0.002"	Hot Rolled	T651	Hardened	-320° to 300°	0.004"	0.005"	00000000	000000
6" x 6"
1 1/4"	-0.002" to 0.002"	Hot Rolled	T651	Hardened	-320° to 300°	0.004"	0.005"	00000000	000000
6" x 12"
1 1/4"	-0.002" to 0.002"	Hot Rolled	T651	Hardened	-320° to 300°	0.004"	0.005"	00000000	000000
6" x 24"
1 1/4"	-0.002" to 0.002"	Hot Rolled	T651	Hardened	-320° to 300°	0.004"	0.005"	00000000	000000
12" x 12"
1 1/4"	-0.002" to 0.002"	Hot Rolled	T651	Hardened	-320° to 300°	0.004"	0.005"	00000000	000000
12" x 18"
1 1/4"	-0.002" to 0.002"	Hot Rolled	T651	Hardened	-320° to 300°	0.004"	0.005"	00000000	000000
12" x 24"
1 1/4"	-0.002" to 0.002"	Hot Rolled	T651	Hardened	-320° to 300°	0.004"	0.005"	00000000	000000

Corrosion-Resistant 3000 Series Aluminum Honeycomb Cores

Yield Strength: Not Rated
Hardness: Not Rated
Temper: Not Rated

The honeycomb design provides a higher strength-to-weight ratio than solid sheets. These cores are often used as a lightweight alternative to solid aluminum and also for sound insulation. 3000 series aluminum stands up to outdoor use, as well as exposure to chemicals. It offers a good combination of strength, formability, and weldability.

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

Thick.	Thick. Tolerance	Honeycomb Cell Size	Max. Load Capacity, lbs./sq. in.	Cell Wall Thick.	Temperature Range, °F		24” × 24”
1 1/4"	-0.008" to 0.008"	1"	75	0.003"	0° to 180°	000000	0000000

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-rolled sheets are cut from large pieces to the widths and lengths listed, so the edges may not be parallel.

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.

Sheets

Yield Strength: 41,000 psi
Hardness: Brinell 120 (Medium)
Temper:
0.020" to 0.190" thick. sheets: T3
All other sizes: T351
Fabrication: Cold Rolled
Specifications Met: ASTM B209

6" × 6"
Thick.	Thick. Tolerance	Heat Treatment	Temperature Range, °F		Each
1 1/4"	-0.047" to 0.047"	Hardened	-320° to 300°	00000000	0000000

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

1 1/4" Thick. (-0.003" to 0.003" Tolerance)
Wd.	Heat Treatment	Temperature Range, °F		1/2 ft. Lg.	1 ft. Lg.	2 ft. Lg.	3 ft. Lg.	6 ft. Lg.
1 1/4"	Hardened	-320° to 300°	00000000	000000	000000	0000000	0000000	0000000
1 1/2"	Hardened	-320° to 300°	000000000	00000	00000	000000	000000	000000
2"	Hardened	-320° to 300°	000000000	00	00	00	000000	000000
2 1/2"	Hardened	-320° to 300°	000000000	00000	000000	000000	000000	000000
4"	Hardened	-320° to 300°	000000000	000000	000000	000000	000000	000000

High-Strength 7075 Aluminum Sheets and Bars

Originally developed for aircraft frames, uses for 7075 aluminum now include keys, gears, and other high-stress parts. It is often used as a replacement for 2024 aluminum because it’s stronger and provides similar performance in all other aspects.

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: See Table
Hardness: Brinell 130 (Medium)
Temper: See Table
Fabrication: Cold Drawn
Specifications Met: ASTM B211, SAE AMS-QQ-A-225/9

1 1/4" Thick. (-0.003" to 0.003" Tolerance)
Wd.	Yield Strength	Temper	Heat Treatment	Temperature Range, °F		1/2 ft. Lg.	1 ft. Lg.	2 ft. Lg.	3 ft. Lg.	6 ft. Lg.
1 1/2"	62,000 psi	T7351	Hardened	-320° to 210°	0000000	000000	000000	0000000	0000000	0000000
2"	62,000 psi	T7351	Hardened	-320° to 210°	0000000	00000	000000	000000	000000	000000
2 1/2"	62,000 psi	T7351	Hardened	-320° to 210°	0000000	00000	000000	000000	000000	000000
3"	62,000 psi	T7351	Hardened	-320° to 210°	0000000	000000	000000	000000	000000	000000

Tight-Tolerance High-Strength 7075 Aluminum Sheets and Bars

Yield Strength: 73,000 psi
Hardness: Brinell 150 (Medium)
Temper: T651
Fabrication: Hot Rolled
Specifications Met: ASTM B209, SAE AMS-QQ-A-250/12

Choose between sheets and bars that are precision ground on all six sides or just on the top and bottom. Originally developed for aircraft frames, uses for 7075 aluminum now include keys, gears, and other high-stress parts. It is often used as a replacement for 2024 aluminum because it’s stronger and provides similar performance in all other aspects.

Sheets and bars that are precision ground on all sides are consistently flat, square, and parallel on all six sides. They’re also known as blanks and are ready for use in your CNC machine.

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.

Precision Ground on All Sides

Thick.	Thick. Tolerance	Heat Treatment	Temp. Range, °F	Parallel Tolerance	Flatness Tolerance		2" × 12"	4" × 12"	6” × 6”	6” × 12”	8" × 8"	8" × 12"	12" × 12"	12” × 24”
1 1/4"	-0.002" to 0.002"	Hardened	-320° to 210°	0.004"	0.005"	0000000	0000000	0000000	0000000	0000000	0000000	0000000	0000000	000000000

High-Strength Mold-Quality Aluminum

Hardness: Brinell 150 (Medium)
Fabrication: Cold Rolled

Designed for use as a production injection mold and blow mold, tk Ultra 7 is extremely strong with a hard surface and excellent thermal conductivity. It’s comparable to QC-10 aluminum.

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.

tk Ultra 7 Aluminum
Thick.	Thick. Tolerance	Yield Strength, psi	Temper	Heat Treatment	Max. Temperature, °F		3" × 3"	6" × 6"	12" × 12"
1 1/4"	0.000" to 0.114"	76,000	Not Rated	Hardened, Stress Relieved	300°	00000000	000000	0000000	0000000

Easy-to-Machine 2011 Aluminum Bars

Yield Strength: 38,000 psi
Hardness: Brinell 115 (Soft)
Temper: T3
Fabrication: Cold Drawn
Specifications Met: ASTM B211, SAE AMS-QQ-A-225/3

2011 has the best machinability of all the aluminum alloys. It is the most selected aluminum for screws, tube fittings, hose parts, and other items that require extensive machining.

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.

Thick.	Thick. Tolerance	Wd.	Heat Treatment	Temperature Range, °F	Straightness Tolerance		3 ft. Lg.	6 ft. Lg.
1 1/4"	-0.003" to 0.003"	1 1/4"	Hardened	-320° to 300°	0.025" per ft.	000000	000000	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.

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.

Thick.	Thick. Tolerance	Heat Treatment		6” × 6”	12" × 12"
1 1/4"	-0.039" to 0.039"	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.

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.

Sheets

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

Easy-to-Machine Cast Aluminum for Tool and Jig Plates

Made of 5083 aluminum, these cast tool and jig plates are more corrosion resistant and respond better to anodizing than MIC6. This material is comparable to Alca 5 and ATP 5. Use for CNC routing tables, assembly jigs, vacuum chucks, and other applications where consistent flatness and tight tolerances are critical.

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.

Sheets

Yield Strength: 18,000 psi
Hardness: Brinell 70 (Soft)
Temper: O
Fabrication: Cast

6" × 6"
Thick.	Thick. Tolerance	Heat Treatment	Temperature Range, °F	Flatness Tolerance		Each
1 1/4"	-0.005" to 0.005"	Annealed (Softened)	70° to 350°	0.005"	00000000	000000
6" × 12"
1 1/4"	-0.005" to 0.005"	Annealed (Softened)	70° to 350°	0.005"	00000000	000000
6" × 24"
1 1/4"	-0.005" to 0.005"	Annealed (Softened)	70° to 350°	0.005"	00000000	000000
8" × 8"
1 1/4"	-0.005" to 0.005"	Annealed (Softened)	70° to 350°	0.005"	00000000	00000
12" × 12"
1 1/4"	-0.005" to 0.005"	Annealed (Softened)	70° to 350°	0.005"	00000000	000000
12" × 24"
1 1/4"	-0.005" to 0.005"	Annealed (Softened)	70° to 350°	0.005"	00000000	000000