Aluminum 6061-T4; 6061-T451

Aluminum 6061-T4; 6061-T451

Subcategory: 6000 Series Aluminum Alloy; Aluminum Alloy; Metal; Nonferrous Metal

Close Analogs:

Composition Notes:
Aluminum content reported is calculated as remainder.
Composition information provided by the Aluminum Association and is not for design.

Key Words: al6061, AD-33 (Russia); AA6061-T451; AA6061-T4, UNS A96061; ISO AlMg1SiCu; Aluminum 6061-T451; Aluminium 6061-T4; Aluminium 6061-T451

Component    Wt. %
Al 95.8 – 98.6
Cr 0.04 – 0.35
Cu 0.15 – 0.4
Fe Max 0.7
Component    Wt. %
Mg 0.8 – 1.2
Mn Max 0.15
Other, each Max 0.05
Other, total Max 0.15
Component    Wt. %
Si 0.4 – 0.8
Ti Max 0.15
Zn Max 0.25

Material Notes: 
Information provided by Alcoa and the references. General 6061 characteristics and uses: Excellent joining characteristics, good acceptance of applied coatings. Combines relatively high strength, good workability, and high resistance to corrosion; widely available. The T8 and T9 tempers offer better chipping characteristics over the T6 temper.

Uses: Aircraft fittings, camera lens mounts, couplings, marines fittings and hardware, electrical fittings and connectors, decorative or misc. hardware, hinge pins, magneto parts, brake pistons, hydraulic pistons, appliance fittings, valves and valve parts.

Data points with the AA note have been provided by the Aluminum Association, Inc. and are NOT FOR DESIGN.

Physical Properties

Physical Properties Metric English Comments
Density 2.7 g/cc 0.0975 lb/in³  AA; Typical

Mechanical Properties

Hardness, Brinell 65 65  AA; Typical; 500 g load; 10 mm ball
Hardness, Knoop 88 88  Converted from Brinell Hardness Value
Hardness, Vickers 75 75  Converted from Brinell Hardness Value
Ultimate Tensile Strength 241 MPa 35000 psi  AA; Typical
Tensile Yield Strength 145 MPa 21000 psi  AA; Typical
Elongation at Break 22 % 22 %  AA; Typical; 1/16 in. (1.6 mm) Thickness
Elongation at Break 25 % 25 %  AA; Typical; 1/2 in. (12.7 mm) Diameter
Modulus of Elasticity 68.9 GPa 10000 ksi  AA; Typical; Average of tension and compression. Compression modulus is about 2% greater than tensile modulus.
Poisson’s Ratio 0.33 0.33  Estimated from trends in similar Al alloys.
Fatigue Strength 96.5 MPa 14000 psi  AA; 500,000,000 cycles completely reversed stress; RR Moore machine/specimen
Machinability 50 % 50 %  0-100 Scale of Aluminum Alloys
Shear Modulus 26 GPa 3770 ksi  Estimated from similar Al alloys.
Shear Strength 165 MPa 24000 psi  AA; Typical

Electrical Properties

Electrical Resistivity 4.32e-006 ohm-cm 4.32e-006 ohm-cm  AA; Typical at 68°F

Thermal Properties

CTE, linear 68°F 23.6 µm/m-°C 13.1 µin/in-°F  AA; Typical; Average over 68-212°F range.
CTE, linear 250°C 25.2 µm/m-°C 14 µin/in-°F  Estimated from trends in similar Al alloys. 20-300°C.
Specific Heat Capacity 0.896 J/g-°C 0.214 BTU/lb-°F
Thermal Conductivity 154 W/m-K 1070 BTU-in/hr-ft²-°F  AA; Typical at 77°F
Melting Point 582 – 652 °C 1080 – 1205 °F  AA; Typical range based on typical composition for wrought products 1/4 inch thickness or greater; Eutectic melting can be completely eliminated by homogenization.
Solidus 582 °C 1080 °F  AA; Typical
Liquidus 652 °C 1205 °F  AA; Typical

Processing Properties

Solution Temperature 529 °C 985 °F
Aging Temperature 160 °C 320 °F  Rolled or drawn products; hold at temperature for 18 hr
Aging Temperature 177 °C 350 °F  Extrusions or forgings; hold at temperature for 8 hr