Aluminum · 13 thicknesses

6061-T6 Aluminum

6061-T6 · ASTM B209

Structural aluminum with excellent machinability and strength. Ideal for brackets, chassis plates, and parts that get machined after cutting. Bends need generous radii — T6 temper cracks on tight bends.

Representative aluminum parts

Thickness & specs

Pick a thickness. Every number below is for that exact gauge.
TRUMPF air bend, this gauge
Bend deduction at standard angles inches
Notes, fine print and guides for this gauge ↓
Design rules, this gauge
How we cut it, notes and guides ↓
Self-clinching hardware, this gauge
Countersinking, this gauge
Tap & clearance drill chart, this gauge
Hardware fit, notes and guides ↓
Deburring, Weber 1350 through-feed
Finishing this material, notes and guides ↓

Working with 6061-T6 Aluminum

Notes for the selected gauge
Values marked † are derived from our V-die geometry (die contact width) rather than measured on the brake: hole/cutout distance = the die contact region from the bend line; Z-bend spacing = minimum flange + material thickness + inside radius (45° offsets add the die lean-over). The ACB Laser minimum leg applies when optical angle measurement is required on your bend. Shorter flanges bend fine, measured with standard methods. All bend data is air-bend reference in inches. We verify on a test bend before production runs.
Corner relief is part-specific. Open Corner relief for recommendations and PDF example photos for the selected gauge. Seam gap, relief-opening size and distance from a bend line are separate dimensions; confirm the flat pattern and forming sequence.
Hardware hole sizes and part numbers are our own catalog figures. Hole sizes differ between PEM series, so don't cross them with another shop's chart. The mounting hole tolerance the clinch depends on is ±0.002″. Countersink fits require at least 0.010″ of material land under the cone; anything less leaves a knife edge that burrs and never seats square. Tap drills shown are the standard shop pick (75% thread inch, D−pitch metric); dial the percentage to your material on the tap & clearance drill chart.

Material properties

Reference values for the alloy family

Compare grades in the metal density chart when estimating weight. For strength specifications, read yield strength vs tensile strength before choosing a design value.

Mechanical & physical

Reference values per the listed specification. A basis for design comparison, not guaranteed minimums for certification work. Material certs available on request.

Supported services

6061-T6 Aluminum bend data by thickness

K-factor, inside radius and bend deduction for a 90° air bend
Every gauge in one table · 13 thicknesses
6061-T6 Aluminum K-factor, inside bend radius, V-die, bend deduction and bend allowance by thickness
ThicknessGaugeV-dieInside radiusK-factorBD 90°BA 90°Min. flange
0.032″ 0.81 mm22 gaCut flat only. Not formed at this thickness.
0.040″ 1.02 mm20 ga8 mm0.050″0.450.0734″0.1068″0.198″
0.050″ 1.27 mm18 ga12 mm0.076″0.450.0971″0.1547″0.298″
0.063″ 1.60 mm16 gaCut flat only. Not formed at this thickness.
0.090″ 2.29 mm13 gaCut flat only. Not formed at this thickness.
0.100″ 2.54 mm12 gaCut flat only. Not formed at this thickness.
0.125″ 3.17 mm1/8″Cut flat only. Not formed at this thickness.
0.188″ 4.78 mm3/16″Cut flat only. Not formed at this thickness.
0.250″ 6.35 mm1/4″Cut flat only. Not formed at this thickness.
0.375″ 9.52 mm3/8″Cut flat only. Not formed at this thickness.
0.500″ 12.70 mm1/2″50 mm0.315″0.420.8053″0.8247″1.240″
0.625″ 15.88 mm5/8″Cut flat only. Not formed at this thickness.
0.750″ 19.05 mm3/4″50 mm0.315″0.421.1404″0.9896″1.240″

Values come from our TRUMPF tooling tables for the die and punch that run each thickness. Bend allowance is calculated as π/2 × (R + K × T). Select a thickness above for every bend angle and the forming limits. How the K-factor works, and every material compared → K-factor chart for 6061-T6 Aluminum →

Feature chart

Scored 1–5 against the other alloys we stock
Material composition — chemistry, temper and what they change

Material science / educational reference

Material composition

Magnesium and silicon give 6061 its heat-treatment response. Small copper and chromium additions are also part of the alloy.

Inside the material

Expand to explore

Selected registered composition limits, in weight percent (wt%). These are alloy limits, not a measured sample or a complete chemical specification.

AluminumBalance

The base metal: the aluminum matrix contains the alloying additions. Balance means the remainder after all other constituents.

Magnesium0.8–1.2%

Works with silicon in the precipitation-hardening system.

Silicon0.40–0.8%

Combines with magnesium in the phases that develop during aging.

Copper0.15–0.40%

Contributes to the alloy’s strengthening response.

Chromium0.04–0.35%

Helps control the grain structure during processing.

Only selected constituents are shown. Weight percent is mass fraction × 100. “Balance” is the remainder after all other elements; ranges and maximum limits are not amounts to add together.

Industry references & further reading

Sources explain the reference basis; they do not certify the material supplied. Reviewed September 19, 2026.

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