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6105 (A96105) Aluminum

6105 aluminum is a 6000-series aluminum alloy: there is significant alloying with both magnesium and silicon, and the alloy is formulated for primary forming into wrought products. 6105 is the Aluminum Association (AA) designation for this material. In European standards, it will be given as EN AW-6105. A96105 is the UNS number.

It originally received its standard designation in 1965.

The properties of 6105 aluminum include two common variations. This page shows summary ranges across both of them. For more specific values, follow the links immediately below. The graph bars on the material properties cards further below compare 6105 aluminum to: 6000-series alloys (top), all aluminum alloys (middle), and the entire database (bottom). A full bar means this is the highest value in the relevant set. A half-full bar means it's 50% of the highest, and so on.

Mechanical Properties

Elastic (Young's, Tensile) Modulus

68 GPa 9.9 x 106 psi

Elongation at Break

9.0 to 16 %

Fatigue Strength

95 to 130 MPa 14 to 19 x 103 psi

Poisson's Ratio

0.33

Shear Modulus

26 GPa 3.7 x 106 psi

Shear Strength

120 to 170 MPa 17 to 24 x 103 psi

Tensile Strength: Ultimate (UTS)

190 to 280 MPa 28 to 41 x 103 psi

Tensile Strength: Yield (Proof)

120 to 270 MPa 17 to 40 x 103 psi

Thermal Properties

Latent Heat of Fusion

410 J/g

Maximum Temperature: Mechanical

160 °C 320 °F

Melting Completion (Liquidus)

650 °C 1200 °F

Melting Onset (Solidus)

600 °C 1110 °F

Specific Heat Capacity

900 J/kg-K 0.22 BTU/lb-°F

Thermal Conductivity

180 to 190 W/m-K 100 to 110 BTU/h-ft-°F

Thermal Expansion

23 µm/m-K

Electrical Properties

Electrical Conductivity: Equal Volume

46 to 50 % IACS

Electrical Conductivity: Equal Weight (Specific)

150 to 170 % IACS

Otherwise Unclassified Properties

Base Metal Price

9.5 % relative

Density

2.7 g/cm3 170 lb/ft3

Embodied Carbon

8.3 kg CO2/kg material

Embodied Energy

150 MJ/kg 66 x 103 BTU/lb

Embodied Water

1180 L/kg 140 gal/lb

Common Calculations

Resilience: Ultimate (Unit Rupture Work)

25 to 27 MJ/m3

Resilience: Unit (Modulus of Resilience)

100 to 550 kJ/m3

Stiffness to Weight: Axial

14 points

Stiffness to Weight: Bending

51 points

Strength to Weight: Axial

20 to 29 points

Strength to Weight: Bending

28 to 35 points

Thermal Diffusivity

72 to 79 m2/s

Thermal Shock Resistance

8.6 to 12 points

Alloy Composition

Among wrought aluminum alloys, the composition of 6105 aluminum is notable for containing comparatively high amounts of silicon (Si) and magnesium (Mg). Silicon is used to increase strength at the expense of ductility. It also lowers the melting temperature and raises the fluidity of the alloy. Magnesium promotes hardenability through both heat treatment and strain hardening mechanisms. It also increases susceptibility to intergranular corrosion.

Aluminum (Al) 97.2 to 99
Silicon (Si) 0.6 to 1.0
Magnesium (Mg) 0.45 to 0.8
Iron (Fe) 0 to 0.35
Manganese (Mn) 0 to 0.1
Chromium (Cr) 0 to 0.1
Titanium (Ti) 0 to 0.1
Zinc (Zn) 0 to 0.1
Copper (Cu) 0 to 0.1
Residuals 0 to 0.15

All values are % weight. Ranges represent what is permitted under applicable standards.

Followup Questions

Similar Alloys

Further Reading

ASTM B221: Standard Specification for Aluminum and Aluminum-Alloy Extruded Bars, Rods, Wire, Profiles, and Tubes

Aluminum Standards and Data, Aluminum Association Inc., 2013