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 mm2/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.
| Al | 97.2 to 99 | |
| Si | 0.6 to 1.0 | |
| Mg | 0.45 to 0.8 | |
| Fe | 0 to 0.35 | |
| Mn | 0 to 0.1 | |
| Cr | 0 to 0.1 | |
| Ti | 0 to 0.1 | |
| Zn | 0 to 0.1 | |
| Cu | 0 to 0.1 | |
| res. | 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