6025 (AlMg2.5SiMnCu, A96025) Aluminum
6025 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. 6025 is the Aluminum Association (AA) designation for this material. In European standards, it will be given as EN AW-6025. A96025 is the UNS number. Additionally, the EN chemical designation is AlMg2,5SiMnCu.
It received its standard designation in 2002, making it a fairly young material.
It has the lowest electrical conductivity and the lowest thermal conductivity among 6000-series alloys.
The properties of 6025 aluminum include five common variations. This page shows summary ranges across all of them. For more specific values, follow the links immediately below. The graph bars on the material properties cards further below compare 6025 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
70 GPa 10 x 106 psi
Elongation at Break
2.8 to 10 %
Fatigue Strength
67 to 110 MPa 9.7 to 16 x 103 psi
Poisson's Ratio
0.33
Shear Modulus
26 GPa 3.8 x 106 psi
Shear Strength
110 to 140 MPa 16 to 20 x 103 psi
Tensile Strength: Ultimate (UTS)
190 to 240 MPa 27 to 34 x 103 psi
Tensile Strength: Yield (Proof)
68 to 210 MPa 9.8 to 30 x 103 psi
Thermal Properties
Latent Heat of Fusion
410 J/g
Maximum Temperature: Mechanical
160 °C 330 °F
Melting Completion (Liquidus)
650 °C 1190 °F
Melting Onset (Solidus)
550 °C 1030 °F
Specific Heat Capacity
900 J/kg-K 0.21 BTU/lb-°F
Thermal Conductivity
130 W/m-K 77 BTU/h-ft-°F
Thermal Expansion
23 µm/m-K
Electrical Properties
Electrical Conductivity: Equal Volume
33 % IACS
Electrical Conductivity: Equal Weight (Specific)
110 % IACS
Otherwise Unclassified Properties
Base Metal Price
9.5 % relative
Density
2.8 g/cm3 170 lb/ft3
Embodied Carbon
8.5 kg CO2/kg material
Embodied Energy
150 MJ/kg 65 x 103 BTU/lb
Embodied Water
1160 L/kg 140 gal/lb
Common Calculations
Resilience: Ultimate (Unit Rupture Work)
6.0 to 15 MJ/m3
Resilience: Unit (Modulus of Resilience)
33 to 310 kJ/m3
Stiffness to Weight: Axial
14 points
Stiffness to Weight: Bending
50 points
Strength to Weight: Axial
19 to 24 points
Strength to Weight: Bending
26 to 31 points
Thermal Diffusivity
54 mm2/s
Thermal Shock Resistance
8.2 to 10 points
Alloy Composition
Among wrought aluminum alloys, the composition of 6025 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 | 91.7 to 96.3 | |
| Mg | 2.1 to 3.0 | |
| Si | 0.8 to 1.5 | |
| Mn | 0.6 to 1.4 | |
| Cu | 0.2 to 0.7 | |
| Fe | 0 to 0.7 | |
| Zn | 0 to 0.5 | |
| Cr | 0 to 0.2 | |
| Ti | 0 to 0.2 | |
| res. | 0 to 0.15 |
All values are % weight. Ranges represent what is permitted under applicable standards.
Followup Questions
Similar Alloys
Further Reading
Handbook of Aluminum vol. 2: Alloy Production and Materials Manufacturing, George Totten and D. Scott MacKenzie (editors), 2003
EN 485-2: Aluminium and aluminium alloys. Sheet, strip and plate. Mechanical properties
ISO 6361-2: Wrought aluminium and aluminium alloys - Sheets, strips and plates - Part 2: Mechanical properties
EN 573-3: Aluminium and aluminium alloys. Chemical composition and form of wrought products. Chemical composition and form of products