5056-O Aluminum
5056-O aluminum is 5056 aluminum in the annealed condition. It has the lowest strength and highest ductility compared to the other variants of 5056 aluminum. The graph bars on the material properties cards below compare 5056-O 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
Elastic (Young's, Tensile) Modulus
67 GPa 9.8 x 106 psi
Elongation at Break
31 %
Fatigue Strength
140 MPa 20 x 103 psi
Poisson's Ratio
0.33
Shear Modulus
25 GPa 3.7 x 106 psi
Shear Strength
170 MPa 25 x 103 psi
Tensile Strength: Ultimate (UTS)
290 MPa 42 x 103 psi
Tensile Strength: Yield (Proof)
150 MPa 22 x 103 psi
Thermal Properties
Latent Heat of Fusion
400 J/g
Maximum Temperature: Mechanical
190 °C 370 °F
Melting Completion (Liquidus)
640 °C 1180 °F
Melting Onset (Solidus)
570 °C 1050 °F
Specific Heat Capacity
910 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
29 % IACS
Electrical Conductivity: Equal Weight (Specific)
99 % IACS
Otherwise Unclassified Properties
Base Metal Price
9.5 % relative
Calomel Potential
-780 mV
Density
2.7 g/cm3 170 lb/ft3
Embodied Carbon
9.0 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)
74 MJ/m3
Resilience: Unit (Modulus of Resilience)
170 kJ/m3
Stiffness to Weight: Axial
14 points
Stiffness to Weight: Bending
51 points
Strength to Weight: Axial
30 points
Strength to Weight: Bending
36 points
Thermal Diffusivity
53 mm2/s
Thermal Shock Resistance
13 points
Alloy Composition
| Al | 93 to 95.4 | |
| Mg | 4.5 to 5.6 | |
| Fe | 0 to 0.4 | |
| Si | 0 to 0.3 | |
| Mn | 0.050 to 0.2 | |
| Cr | 0.050 to 0.2 | |
| 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
Further Reading
ASTM B211: Standard Specification for Aluminum and Aluminum-Alloy Bar, Rod, and Wire
Aluminum Standards and Data, Aluminum Association Inc., 2013
ASM Specialty Handbook: Aluminum and Aluminum Alloys, J. R. Davis (editor), 1993