Aluminum 6061-T91


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, UNS A96061; ISO AlMg1SiCu; Aluminium 6061-T91, AD-33 (Russia); AA6061-T91

Component   Wt. %
Al95.8 - 98.6 
Cr0.04 - 0.35 
Cu0.15 - 0.4 
FeMax 0.7 
Component   Wt. %
Mg0.8 - 1.2 
MnMax 0.15 
Other, eachMax 0.05 
Other, totalMax 0.15 
Component   Wt. %
Si0.4 - 0.8 
TiMax 0.15 
ZnMax 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 PropertiesMetricEnglishComments
Density2.7 g/cc0.0975 lb/in³ AA; Typical

Mechanical Properties
Hardness, Brinell108108 500 kg load with 10 mm ball. Calculated value.
Hardness, Knoop137137 Converted from Brinell Hardness Value
Hardness, Rockwell A44.144.1 Converted from Brinell Hardness Value
Hardness, Rockwell B6969 Converted from Brinell Hardness Value
Hardness, Vickers123123 Converted from Brinell Hardness Value
Tensile Strength, Ultimate405 MPa58700 psi 
Tensile Strength, Yield395 MPa57300 psi 
Elongation at Break12 %12 % In 5 cm; Sample 1.6 mm thick
Modulus of Elasticity69 GPa10000 ksi Average of Tension and Compression. In Aluminum alloys, the compressive modulus is typically 2% greater than the tensile modulus
Poisson's Ratio0.330.33 Estimated from trends in similar Al alloys.
Fatigue Strength95 MPa13800 psi 500,000,000 Cycles
Shear Modulus26 GPa3770 ksi Estimated from similar Al alloys.
Shear Strength230 MPa33400 psi 

Electrical Properties
Electrical Resistivity4e-006 ohm-cm4e-006 ohm-cm Estimated from other heat treatments.

Thermal Properties
CTE, linear 68°F23.6 µm/m-°C13.1 µin/in-°F AA; Typical; Average over 68-212°F range.
CTE, linear 250°C25.2 µm/m-°C14 µin/in-°F Estimated from trends in similar Al alloys. 20-300°C.
Specific Heat Capacity0.896 J/g-°C0.214 BTU/lb-°F 
Thermal Conductivity170 W/m-K1180 BTU-in/hr-ft²-°F Estimated from other heat treatments.
Melting Point582 - 652 °C1080 - 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.
Solidus582 °C1080 °F AA; Typical
Liquidus652 °C1205 °F AA; Typical

Processing Properties
Solution Temperature529 °C985 °F 
Aging Temperature160 °C320 °F Rolled or drawn products; hold at temperature for 18 hr
Aging Temperature177 °C350 °F Extrusions or forgings; hold at temperature for 8 hr

References for this datasheet.


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