5086 (AlMg4, 3.3545, A95086) Aluminum
5086 aluminum is a 5000-series aluminum alloy: the main alloying addition is magnesium, and it is formulated for primary forming into wrought products. 5086 is the Aluminum Association (AA) designation for this material. In European standards, it will be given as EN AW-5086. AlMg4 is the EN chemical designation. A95086 is the UNS number. Additionally, the AFNOR (French) designation is A-G4MC.
It originally received its standard designation in 1954. This material is well established: the Further Reading section below cites a number of published standards, and that list is not necessarily exhaustive.
The properties of 5086 aluminum include 18 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 5086 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
Brinell Hardness
65 to 100
Elastic (Young's, Tensile) Modulus
68 GPa 9.9 x 106 psi
Elongation at Break
1.7 to 20 %
Fatigue Strength
88 to 180 MPa 13 to 26 x 103 psi
Poisson's Ratio
0.33
Shear Modulus
26 GPa 3.7 x 106 psi
Shear Strength
160 to 230 MPa 23 to 33 x 103 psi
Tensile Strength: Ultimate (UTS)
270 to 390 MPa 39 to 57 x 103 psi
Tensile Strength: Yield (Proof)
110 to 320 MPa 16 to 47 x 103 psi
Thermal Properties
Latent Heat of Fusion
400 J/g
Maximum Temperature: Corrosion
65 °C 150 °F
Maximum Temperature: Mechanical
190 °C 370 °F
Melting Completion (Liquidus)
640 °C 1180 °F
Melting Onset (Solidus)
590 °C 1090 °F
Specific Heat Capacity
900 J/kg-K 0.22 BTU/lb-°F
Thermal Conductivity
130 W/m-K 73 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
Calomel Potential
-760 mV
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
1180 L/kg 140 gal/lb
Common Calculations
Resilience: Ultimate (Unit Rupture Work)
5.8 to 42 MJ/m3
Resilience: Unit (Modulus of Resilience)
86 to 770 kJ/m3
Stiffness to Weight: Axial
14 points
Stiffness to Weight: Bending
50 points
Strength to Weight: Axial
28 to 40 points
Strength to Weight: Bending
34 to 44 points
Thermal Diffusivity
52 mm2/s
Thermal Shock Resistance
12 to 17 points
Alloy Composition
Among wrought aluminum alloys, the composition of 5086 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 | 93 to 96.3 | |
| Mg | 3.5 to 4.5 | |
| Mn | 0.2 to 0.7 | |
| Fe | 0 to 0.5 | |
| Si | 0 to 0.4 | |
| Cr | 0.050 to 0.25 | |
| Zn | 0 to 0.25 | |
| Ti | 0 to 0.15 | |
| 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 B928: Standard Specification for High Magnesium Aluminum-Alloy Sheet and Plate for Marine Service
ASTM B210: Standard Specification for Aluminum and Aluminum-Alloy Drawn Seamless Tubes
ASTM B547: Standard Specification for Aluminum and Aluminum-Alloy Formed and Arc-Welded Round Tube
ASTM B221: Standard Specification for Aluminum and Aluminum-Alloy Extruded Bars, Rods, Wire, Profiles, and Tubes
EN 754-2: Aluminium and aluminium alloys. Cold drawn rod/bar and tube. Mechanical properties
ASTM B209: Standard Specification for Aluminum and Aluminum-Alloy Sheet and Plate
Pressure Vessels: External Pressure Technology, 2nd ed., Carl T. F. Ross, 2011
EN 755-2: Aluminium and aluminium alloys. Extruded rod/bar, tube and profiles. Mechanical properties
EN 485-2: Aluminium and aluminium alloys. Sheet, strip and plate. Mechanical properties
Aluminum Standards and Data, Aluminum Association Inc., 2013