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Strong. Durable. Versatile.

Built for performance, 6061-T6 is the alloy that holds the line when the work gets heavy.

Known for its high strength-to-weight ratio, excellent corrosion resistance, and heat-treated hardness, 6061-T6 is the go-to structural aluminum alloy for demanding industrial, architectural, and mechanical applications.

At Aluminum Supply Company (ASCO), we stock and source a full range of 6061-T6 profiles — the shapes you rely on to build machines, reinforce structures, and move projects forward.

From Detroit to wherever the job takes you, ASCO brings mill-certified material, precise cutting, and the turnaround time serious builders expect.

Several round rod extrusions are stacked on a shelf.

Engineered for the Load

6061-T6 delivers strength without unnecessary weight. It resists deformation, welds cleanly, and maintains dimensional stability through machining and assembly.

Wherever stress or vibration is a factor — construction frames, automotive parts, marine platforms — this alloy proves its worth.

Standard Shapes

ASCO stocks common structural profiles and can source or fabricate to spec. All of the following available in mill finish with options for anodized or painted coatings.

Solids

6061-T6 round rod delivers exceptional strength, machinability, and corrosion resistance. Precision-drawn and heat-treated, it’s the standard for machined components, shafts, and industrial fasteners where lightweight performance is essential.

Common Applications: Pins, bushings, shafts, spacers, industrial hardware.

A diagram of a round rod shows the height labeled A.
Diameter (A) Length
Inches Feet
0.125 12
0.188 12
0.250 12
0.313 12
0.375 12
0.438 12
0.500 12
0.625 12
0.750 12
0.875 12
1.000 12
1.125 12
1.250 12
1.375 12
1.500 12
1.625 12
1.750 12
1.875 12
2.000 12
2.500 12
3.000 12
3.500 12
4.000 12
4.250 12
4.500 12
5.000 12
5.250 12
5.500 12
5.750 12
6.000 12
6.250 12
6.500 12
6.750 12
7.000 12
7.250 12
7.500 12
8.000 12

6061-T6 square bar offers high rigidity and consistent tolerance for structural or machined parts. Ideal for fixtures, mounting blocks, and heavy-duty brackets, it holds threads and tolerances with reliability that defines American manufacturing.

Common Applications: Mounting blocks, jigs, fixtures, structural braces.

A diagram of a square bar shows the equal sides labeled A.
Dimension (A) Length
Inches Feet
0.313 12
0.375 12
0.500 12
0.750 12
1.000 12
1.250 12
1.750 12
2.000 12
2.250 12
2.500 12
2.750 12
3.000 12
3.250 12
3.500 12
3.750 12
4.000 12
4.500 12
5.000 12
5.500 12
6.000 12

This workhorse alloy bar combines high strength with outstanding dimensional accuracy. Used extensively in manufacturing and fabrication where load-bearing strength, machinability, and weldability are critical.

Common Applications: Machine bases, structural supports, tool plates, assemblies.

A diagram of a rectangular bar shows the shorter side labeled A and the longer side labeled B.
Thickness (A) Width (B) Length
Inches Inches Feet
0.125 0.500 12
0.625 12
0.750 12
1.000 12
1.250 12
1.500 12
1.750 12
2.000 12
2.500 12
3.000 12
3.500 12
4.000 12
5.000 12
6.000 12
0.188 0.750 12
1.000 12
1.250 12
1.500 12
1.750 12
2.000 12
2.500 12
3.000 12
3.500 12
4.000 12
5.000 12
6.000 12
0.250 0.500 12
0.625 12
0.750 12
1.000 12
1.250 12
1.500 12
1.750 12
2.000 12
2.250 12
2.500 12
2.750 12
3.000 12
3.250 12
3.500 12
4.000 12
4.500 12
5.000 12
6.000 12
8.000 12
10.000 12
12.000 12
0.313 0.500 12
0.750 12
1.000 12
1.500 12
2.000 12
0.375 0.500 12
1.000 12
1.250 12
1.500 12
1.750 12
2.000 12
2.500 12
3.000 12
3.250 12
3.500 12
4.000 12
4.500 12
5.000 12
6.000 12
7.000 12
8.000 12
0.500 0.750 12
1.000 12
1.250 12
1.500 12
1.750 12
2.000 12
2.250 12
2.500 12
3.000 12
4.000 12
5.000 12
6.000 12
7.000 12
8.000 12
10.000 12
12.000 12
14.000 12
0.625 0.750 12
1.000 12
1.500 12
2.000 12
2.500 12
3.000 12
6.000 12
0.750 1.000 12
1.250 12
1.500 12
1.750 12
2.000 12
3.000 12
4.000 12
5.000 12
6.000 12
8.000 12
10.000 12
12.000 12
1.000 1.250 12
1.500 12
2.000 12
3.000 12
4.000 12
5.000 12
6.000 12
7.000 12
8.000 12
10.000 12
12.000 12
14.000 12
1.250 1.500 12
2.000 12
2.500 12
3.000 12
3.750 12
4.000 12
4.500 12
5.500 12
6.000 12
1.500 1.750 12
2.000 12
2.500 12
3.000 12
3.500 12
4.000 12
5.000 12
5.500 12
6.000 12
6.500 12
8.000 12
8.500 12
12.000 12
14.000 12
2.000 2.500 12
3.000 12
3.500 12
4.000 12
4.500 12
5.000 12
6.000 12
6.500 12
8.000 12
2.500 3.000 12
3.250 12
3.500 12
4.000 12
4.500 12
5.000 12
5.500 12
6.000 12
3.000 4.000 12
4.500 12
5.000 12
6.000 12
4.000 4.500 12
5.000 12
6.000 12

Angles

6061-T6 equal angle provides rigid reinforcement for structural framing and mechanical assemblies. Its high strength-to-weight ratio and corrosion resistance make it ideal for exposed frameworks and heavy-use environments.

Common Applications: Frameworks, cross-braces, corner reinforcements, marine structures.

An illustration of an unequal angle shows the equal sides labeled A and the thickness labeled B.
Legs (A) Wall Thickness (B) Length Weight
Inches Inches Feet Lbs./Ft.
0.750 0.125 25 0.202
1.000 0.125 25 0.275
1.000 0.188 25 0.400
1.000 0.250 25 0.514
1.250 0.125 25 0.350
1.250 0.188 25 0.494
1.250 0.250 25 0.662
1.500 0.125 25 0.423
1.500 0.188 25 0.623
1.500 0.250 25 0.809
1.500 0.375 25 1.158
1.750 0.125 25 0.498
1.750 0.188 25 0.733
1.750 0.250 25 0.956
2.000 0.125 25 0.578
2.000 0.188 25 0.850
2.000 0.250 25 1.110
2.000 0.375 25 1.606
2.500 0.188 25 1.070
2.500 0.250 25 1.404
2.500 0.375 25 2.047
3.000 0.188 25 1.283
3.000 0.250 25 1.684
3.000 0.313 25 2.080
3.000 0.375 25 2.474
3.000 0.500 25 3.227
3.500 0.250 25 1.988
3.500 0.375 25 2.925
3.500 0.500 25 3.826
4.000 0.250 25 2.282
4.000 0.375 25 3.366
4.000 0.500 25 4.414
5.000 0.375 25 4.237
5.000 0.500 25 5.578
6.000 0.375 25 5.119
6.000 0.500 25 6.754
6.000 0.625 25 8.853
6.000 0.750 25 9.915
8.000 0.500 25 9.142
8.000 0.625 25 11.328
8.000 0.750 25 13.478
8.000 1.000 25 17.668

When design calls for asymmetric strength distribution, unequal angles deliver. Precision-extruded for consistency, they’re often used in brackets and assemblies where space and load balance are key.

Common Applications: Equipment frames, transport structures, heavy brackets, supports.

An illustration of an unequal angle shows the shorter side labeled A and the longer labeled B. The thickness of the material is labeled C.
Leg (A) Leg (B) Thickness Length
Inches Inches Inches Feet
1.000 1.500 0.125 25
1.000 1.500 0.250 25
1.250 1.500 0.188 25
1.250 1.500 0.250 25
1.250 1.750 0.125 25
1.250 1.750 0.188 25
1.250 1.750 0.250 25
1.500 2.000 0.125 25
1.500 2.000 0.188 25
1.500 2.000 0.250 25
1.500 2.500 0.125 25
1.500 2.500 0.250 25
2.000 2.500 0.188 25
2.000 2.500 0.250 25
2.000 3.000 0.188 25
2.000 3.000 0.250 25
2.000 3.000 0.375 25
2.500 3.000 0.250 25
2.500 3.500 0.250 25
2.500 3.500 0.375 25
3.000 3.500 0.250 25
2.000 4.000 0.250 25
3.000 4.000 0.250 25
3.000 4.000 0.375 25
3.000 4.000 0.500 25
3.000 5.000 0.250 25
3.000 5.000 0.375 25
3.000 5.000 0.500 25
3.000 6.000 0.375 25
4.000 6.000 0.375 25
4.000 6.000 0.500 25
6.000 8.000 0.750 25

Tubes & Pipe

High-strength square tube provides rigidity and balance in lightweight frameworks. It’s a preferred choice for structural and load-bearing applications where aesthetics matter less than performance.

Common Applications: Machine frames, heavy racks, trailers, marine equipment.

A diagram of a square tube shows the equal sides labeled A and the thickness labeled B.
Dimension (A) Thickness (B) Length
Inches Inches Feet
1.000 0.125 24
1.500 0.125 24
2.000 0.125 24
2.500 0.125 24
3.000 0.125 24
4.000 0.125 24
2.000 0.188 24
3.000 0.188 24
4.000 0.188 24
5.000 0.188 24
2.000 0.250 24
2.500 0.250 24
3.000 0.250 24
4.000 0.250 24
5.000 0.250 24
6.000 0.250 24
6.000 0.500 24

6061-T6 rectangular tubing offers excellent strength and weldability, making it a standard in mechanical fabrication. The elongated geometry allows for directional reinforcement and reduced deflection.

Common Applications: Platforms, conveyor systems, transport frames, support arms.

A diagram of a rectangular tube shows the sides both labeled A and the thickness labeled B.
Width (A) Height (B) Thickness (C) Length
Inches Inches Inches Feet
1.000 2.000 0.125 24
1.500 2.500 0.125 24
1.500 3.000 0.125 24
1.500 3.000 0.188 24
2.000 3.000 0.125 24
2.000 3.000 0.250 24
2.000 4.000 0.125 24
2.000 4.000 0.250 24
2.000 6.000 0.250 24
2.000 8.000 0.250 24
3.000 5.000 0.250 24
3.000 6.000 0.188 24
4.000 6.000 0.250 24
4.000 8.000 0.250 24

Strong, weldable, and corrosion-resistant, 6061-T6 round tubing is the go-to for mechanical assemblies and marine structures. Its consistent wall thickness and clean finish simplify fabrication.

Common Applications: Railings, marine towers, piping systems, roll cages, frames.

A diagram of a round tube shows the width labeled A and the thickness labeled B.
Outside (A) Thickness (B) Length
Inches Inches Feet
1.000 0.125 24
0.188 24
0.25 24
1.500 0.065 24
0.125 24
0.250 24
1.750 0.125 24
0.250 24
0.375 24
2.000 0.065 24
0.125 24
0.188 24
0.250 24
2.500 0.125 24
0.250 24
3.000 0.125 24
0.250 24
0.500 24
3.500 0.125 24
0.250 24
4.000 0.125 24
0.250 24
0.500 24
6.000 0.125 24
0.250 24
0.500 24

Strong, weldable, and corrosion-resistant, 6061-T6 round tubing is the go-to for mechanical assemblies and marine structures. Its consistent wall thickness and clean finish simplify fabrication.

Common Applications: Railings, marine towers, piping systems, roll cages, frames.

A diagram of a round tube shows the width labeled A and the thickness labeled B.
NPS O.D. Length Wall Thickness (B) O.D. Length
SCH 10 SCH 40 SCH 80 NPS
0.500 0.840 20 0.109
0.750 1.050 20 0.113
1.000 1.315 20 0.133 0.179
1.250 1.660 20 0.109 0.140 0.191
1.500 1.900 20 0.109 0.145 0.200
2.000 2.375 20 0.109 0.154 0.218
2.500 2.875 20 0.120 0.203 0.276
3.000 3.500 20 0.120 0.216 0.300
3.500 4.000 20 0.120 0.226 0.318
4.000 4.500 20 0.120 0.237 0.337
4.500 5.000 20 0.247
5.000 5.563 20 0.134 0.258 0.375
6.000 6.625 20 0.134 0.280 0.432

Channels

The classic C-channel profile used throughout U.S. manufacturing and construction. Its tapered flanges and defined web thickness make it a reliable component for load-bearing assemblies, trailers, and frameworks.

Common Applications: Truck beds, platforms, structural framing, industrial fixtures.

A diagram of an American standard channel shows the width labeled A, the sides labeled B, and the thickness labeled C.
Width (A) Flange (B) Web (C) Length Weight
Inches Inches Inches Feet Lbs./Ft.
3 1.410 0.170 25 1.418
3 1.500 0.258 25 1.729
3 1.600 0.356 25 2.070
4 1.580 0.180 25 1.846
4 1.650 0.247 25 2.163
4 1.720 0.320 25 2.505
5 1.750 0.190 25 2.316
5 1.885 0.325 25 3.100
5 2.032 0.472 25 3.974
6 1.920 0.200 25 2.826
6 1.945 0.225 25 3.002
6 2.030 0.314 25 3.630
6 2.157 0.437 25 4.505
7 2.110 0.230 25 3.541
7 3.500 0.210 25 4.714
8 2.290 0.250 25 4.252
8 2.527 0.488 25 6.482
9 2.430 0.230 25 6.911
10 2.600 0.240 25 5.279
10 2.886 0.526 25 8.642
12 2.960 0.300 25 7.411
12 3.047 0.387 25 8.639
12 3.170 0.510 25 10.374

With uniform flange thickness and a cleaner, symmetrical appearance, Aluminum Association channels are ideal for architectural and precision fabrication projects where both strength and finish quality matter.

Common Applications: Equipment frames, architectural supports, industrial rail systems.

A diagram of an Aluminum Association channel shows the width labeled A, the sides labeled B, and the thickness labeled C.
Width (A) Flange (B) Web (C) Length Weight
Inches Inches Inches Feet Lbs./Ft.
2 1.000 0.130 25 0.577
2 1.250 0.170 25 1.071
3 1.500 0.130 25 1.134
3 1.750 0.170 25 1.597
4 2.000 0.150 25 1.738
4 2.250 0.190 25 2.330
5 2.250 0.150 25 2.211
5 2.750 0.190 25 3.089
6 2.500 0.170 25 2.834
6 3.250 0.210 25 4.030
7 2.750 0.170 25 3.204
7 3.500 0.210 25 4.714
8 3.000 0.190 25 4.146
8 3.750 0.250 25 5.789
9 3.250 0.230 25 4.982
9 4.000 0.290 25 6.970
10 3.500 0.250 25 6.136
10 4.250 0.310 25 8.360
12 4.000 0.290 25 8.274
12 5.000 0.350 25 11.822

I-Beams

6061-T6 I-beams deliver outstanding load-carrying performance while remaining light enough for versatile applications. The alloy’s structural properties make it an ideal alternative to steel for weight-sensitive frameworks.

Common Applications: Bridge components, machine bases, mezzanines, platforms, trailers.

A diagram of an Aluminum Association I-beam shows the height labeled A, the width labeled B, and the thickness labeled C.
Height (A) Flange (B) Web (C) Length Weight
Inches Inches Inches Feet Lbs./Ft.
3 2.500 0.130 25 1.637
3 2.500 0.150 25 2.030
4 3.000 0.170 25 2.793
5 3.500 0.190 25 3.700
6 4.000 0.190 25 4.030
6 4.000 0.210 25 4.692
7 4.500 0.230 25 5.800
8 5.000 0.230 25 6.181
8 5.000 0.250 25 7.023
10 6.000 0.250 25 8.646
10 6.000 0.290 25 10.287
12 7.000 0.290 25 11.671
12 7.000 0.310 25 14.292

Recognized by its tapered flanges, this beam style balances strength and economy. Perfect for retrofits, heavy-duty racks, and industrial load structures.

Common Applications: Industrial frameworks, transport platforms, crane beams.

A diagram of an American Standard I-Beam shows the height labeled A, the width labeled B, and the thickness labeled C.
Height (A) Flange (B) Web (C) Length Weight
Inches Inches Inches Feet Lbs./Ft.
3 2.330 0.170 25 1.963
3 2.509 0.349 25 2.599
4 2.660 0.190 25 2.646
4 2.796 0.326 25 3.281
5 3.000 0.210 25 3.43
5 3.284 0.494 25 5.099
6 3.330 0.230 25 4.303
6 5.099 0.343 25 5.104
7 3.755 0.345 25 6.052
8 4.000 0.270 25 6.35
12 5.000 0.350 25 10.996

Uniform flange thickness and precision tolerances make this profile a favorite for engineered aluminum structures. Designed for efficiency in both vertical and lateral loading.

Common Applications: Framing systems, building supports, modular assemblies.

A diagram of an Aluminum Association I-beam shows the height labeled A, the width labeled B, and the thickness labeled C.
Height (A) Flange (B) Web (C) Length Weight
Inches Inches Inches Feet Lbs./Ft.
3 2.500 0.130 25 1.637
3 2.500 0.150 25 2.030
4 3.000 0.170 25 2.793
5 3.500 0.190 25 3.700
6 4.000 0.190 25 4.030
6 4.000 0.210 25 4.692
7 4.500 0.230 25 5.800
8 5.000 0.230 25 6.181
8 5.000 0.250 25 7.023
10 6.000 0.250 25 8.646
10 6.000 0.290 25 10.287
12 7.000 0.290 25 11.671
12 7.000 0.310 25 14.292

The heavy lifter of aluminum profiles, wide-flange beams provide maximum load capacity and deflection control. Precision-extruded and heat-treated for applications where nothing less than structural-grade performance will do.

Common Applications: Building structures, bridges, trailers, and heavy equipment frames.

A diagram of a wide I-beam shows the height labeled A, the width labeled B, and the thickness labeled C.
Height (A) Flange (B) Web (C) Length Weight
Inches Inches Inches Feet Lbs./Ft.
3 2.330 0.170 25 1.963
3 2.509 0.349 25 2.599
4 2.660 0.190 25 2.646
4 2.796 0.326 25 3.281
5 3.000 0.210 25 3.43
5 3.284 0.494 25 5.099
6 3.330 0.230 25 4.303
6 5.099 0.343 25 5.104
7 3.755 0.345 25 6.052
8 4.000 0.270 25 6.35
12 5.000 0.350 25 10.996

Other

6061-T6 tee bars bring a balance of strength and formability. They’re commonly used as stiffeners and joint supports in structural assemblies requiring clean intersections and efficient load transfer.

Common Applications: Bracing, transition bars, panel stiffeners, sub-frames.

6061-T6 zee shapes provide outstanding resistance to bending and warping while keeping weight low. The profile’s inherent rigidity makes it ideal for structural reinforcement and panel supports.

Common Applications: Purlins, panel supports, flashing brackets, roof and wall stiffeners.

Applications that Demand Performance

6061-T6 extrusions serve wherever high mechanical strength and corrosion resistance intersect.

Typical Uses

  • Aerospace & Automotive: Frames, panels, brackets, load structures.
  • Construction: Beams, framing systems, supports, platforms.
  • Marine & Offshore: Boat hulls, docks, ramps, catwalks.
  • Manufacturing: Fixtures, guards, machine bases, tooling.
  • Sign & Display: Rigid frames, outdoor installations.

Whether you’re fabricating a high-rise curtain wall support or a one-off custom assembly, 6061-T6 gives you a material that machines, welds, and performs like steel — but lighter.

Several rectangular bar extrusions are stacked on a shelf.
Several square bar extrusions are stacked on a shelf.
Several square tube extrusions are stacked on a shelf.
Several unequal angle extrusions are stacked on a shelf.

Chemical Composition (ASTM B221)

Element Percentage (%)
Aluminum (Al) ~96.5 (balance)
Silicon (Si) 0.4–0.8
Magnesium (Mg) 0.8–1.2
Iron (Fe) ≤0.70
Copper (Cu) 0.15–0.40
Chromium (Cr) 0.04–0.35
Zinc (Zn) ≤0.25
Titanium (Ti) ≤0.15
Other (total) ≤0.15

Did You Know?

  • Tensile Strength: ~42,000 psi
  • Yield Strength: ~35,000 psi
  • Thermal Stability: Heat-treated and artificially aged for predictable strength
  • Corrosion Resistance: Magnesium and silicon alloying ensure long life in marine or outdoor exposure
  • Sustainability: 100% recyclable — no loss of mechanical integrity

6061-T6 vs. 6063-T5

Know the Difference

Each alloy serves a distinct purpose.

Bottom Line

Use 6061-T6 when it has to hold.

Use 6063-T5 when it has to show.

ASCO carries both — and knows when to use each.

Property 6061-T6 6063-T5
Primary Use Structural & load-bearing Architectural & decorative
Strength High Moderate
Corrosion Resistance Excellent Excellent
Machinability Moderate-High High
Formability Limited Excellent
Surface Finish Good Superior
Best For Beams, frames, marine Trim, rails, glazing

Fabrication Ready

ASCO’s in-house processing makes 6061-T6 more than stock — it’s build-ready.

Capabilities

  • Precision saw-cutting and shearing
  • Brake forming and machining
  • Punching, notching, and welding
  • Anodized, painted, or powder-coated finishes
  • CAD-verified drawings and quick quoting

We don’t just sell extrusions — we deliver them finished, labeled, and ready to install.

Built in Detroit. Delivered Anywhere.

Whether you’re a contractor working steel-to-aluminum transitions, or an OEM sourcing repeat production parts, ASCO keeps your timeline tight and your specs met.

Strength where it counts. Finish that lasts. Service that delivers.

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