5070 (5070-O, AlMg4MnZn) Aluminum
5070 aluminum is a 5000-series aluminum alloy: the main alloying addition is magnesium, and it is formulated for primary forming into wrought products. Cited properties are appropriate for the annealed condition. 5070 is the Aluminum Association (AA) designation for this material. In European standards, it will be given as EN AW-5070. AlMg4MnZn is the EN chemical designation. Additionally, the UNS number is A95070.
It received its standard designation in 2003, making it a fairly young material.
The graph bars on the material properties cards below compare 5070 aluminum to: 5000-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
20 %
Fatigue Strength
150 MPa 22 x 103 psi
Poisson's Ratio
0.33
Shear Modulus
26 GPa 3.7 x 106 psi
Shear Strength
190 MPa 28 x 103 psi
Tensile Strength: Ultimate (UTS)
300 MPa 44 x 103 psi
Tensile Strength: Yield (Proof)
140 MPa 20 x 103 psi
Thermal Properties
Latent Heat of Fusion
390 J/g
Maximum Temperature: Mechanical
190 °C 370 °F
Melting Completion (Liquidus)
640 °C 1190 °F
Melting Onset (Solidus)
550 °C 1020 °F
Specific Heat Capacity
900 J/kg-K 0.21 BTU/lb-°F
Thermal Conductivity
130 W/m-K 75 BTU/h-ft-°F
Thermal Expansion
24 µm/m-K
Electrical Properties
Electrical Conductivity: Equal Volume
31 % IACS
Electrical Conductivity: Equal Weight (Specific)
100 % IACS
Otherwise Unclassified Properties
Base Metal Price
9.5 % relative
Density
2.7 g/cm3 170 lb/ft3
Embodied Carbon
8.8 kg CO2/kg material
Embodied Energy
150 MJ/kg 66 x 103 BTU/lb
Embodied Water
1170 L/kg 140 gal/lb
Common Calculations
Resilience: Ultimate (Unit Rupture Work)
51 MJ/m3
Resilience: Unit (Modulus of Resilience)
150 kJ/m3
Stiffness to Weight: Axial
14 points
Stiffness to Weight: Bending
50 points
Strength to Weight: Axial
31 points
Strength to Weight: Bending
37 points
Thermal Diffusivity
53 mm2/s
Thermal Shock Resistance
14 points
Alloy Composition
Among wrought aluminum alloys, the composition of 5070 aluminum is notable for containing a comparatively high amount of magnesium (Mg). Magnesium promotes hardenability through both heat treatment and strain hardening mechanisms. It also increases susceptibility to intergranular corrosion.
| Al | 92.4 to 95.7 | |
| Mg | 3.5 to 4.5 | |
| Mn | 0.4 to 0.8 | |
| Zn | 0.4 to 0.8 | |
| Fe | 0 to 0.4 | |
| Cr | 0 to 0.3 | |
| Si | 0 to 0.25 | |
| Cu | 0 to 0.25 | |
| Ti | 0 to 0.15 | |
| res. | 0 to 0.15 |
All values are % weight. Ranges represent what is permitted under applicable standards.
Followup Questions
Similar Alloys
Further Reading
Aluminum: Properties and Physical Metallurgy, John E. Hatch (editor), 1984
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
CRC Materials Science and Engineering Handbook, 4th ed., James F. Shackelford et al. (editors), 2015