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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


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


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.

Aluminum (Al)Al 91.7 to 96.3
Magnesium (Mg)Mg 2.1 to 3.0
Silicon (Si)Si 0.8 to 1.5
Manganese (Mn)Mn 0.6 to 1.4
Copper (Cu)Cu 0.2 to 0.7
Iron (Fe)Fe 0 to 0.7
Zinc (Zn)Zn 0 to 0.5
Chromium (Cr)Cr 0 to 0.2
Titanium (Ti)Ti 0 to 0.2
Residualsres. 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