4115-O Aluminum
4115-O aluminum is 4115 aluminum in the annealed condition. It has the lowest strength and highest ductility compared to the other variants of 4115 aluminum. The graph bars on the material properties cards below compare 4115-O aluminum to: 4000-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
38
Elastic (Young's, Tensile) Modulus
70 GPa 10 x 106 psi
Elongation at Break
11 %
Fatigue Strength
39 MPa 5.7 x 103 psi
Poisson's Ratio
0.33
Shear Modulus
26 GPa 3.8 x 106 psi
Shear Strength
71 MPa 10 x 103 psi
Tensile Strength: Ultimate (UTS)
120 MPa 17 x 103 psi
Tensile Strength: Yield (Proof)
39 MPa 5.7 x 103 psi
Thermal Properties
Latent Heat of Fusion
420 J/g
Maximum Temperature: Mechanical
160 °C 320 °F
Melting Completion (Liquidus)
640 °C 1180 °F
Melting Onset (Solidus)
590 °C 1100 °F
Specific Heat Capacity
900 J/kg-K 0.21 BTU/lb-°F
Thermal Conductivity
160 W/m-K 94 BTU/h-ft-°F
Thermal Expansion
23 µm/m-K
Electrical Properties
Electrical Conductivity: Equal Volume
41 % IACS
Electrical Conductivity: Equal Weight (Specific)
140 % IACS
Otherwise Unclassified Properties
Base Metal Price
9.5 % relative
Density
2.7 g/cm3 170 lb/ft3
Embodied Carbon
8.1 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)
10 MJ/m3
Resilience: Unit (Modulus of Resilience)
11 kJ/m3
Stiffness to Weight: Axial
14 points
Stiffness to Weight: Bending
50 points
Strength to Weight: Axial
12 points
Strength to Weight: Bending
20 points
Thermal Diffusivity
66 mm2/s
Thermal Shock Resistance
5.2 points
Alloy Composition
| Al | 94.6 to 97.4 | |
| Si | 1.8 to 2.2 | |
| Mn | 0.6 to 1.2 | |
| Fe | 0 to 0.7 | |
| Cu | 0.1 to 0.5 | |
| Mg | 0.1 to 0.5 | |
| Zn | 0 to 0.2 | |
| res. | 0 to 0.15 |
All values are % weight. Ranges represent what is permitted under applicable standards.
Followup Questions
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