4115-H26 Aluminum
4115-H26 aluminum is 4115 aluminum in the H26 temper. To achieve this temper, the metal is strain hardened, and then partially annealed, to a strength that is roughly 3/4 of the way between annealed (O) and full-hard (H28).
The graph bars on the material properties cards below compare 4115-H26 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
68
Elastic (Young's, Tensile) Modulus
70 GPa 10 x 106 psi
Elongation at Break
3.4 %
Fatigue Strength
76 MPa 11 x 103 psi
Poisson's Ratio
0.33
Shear Modulus
26 GPa 3.8 x 106 psi
Shear Strength
110 MPa 17 x 103 psi
Tensile Strength: Ultimate (UTS)
200 MPa 29 x 103 psi
Tensile Strength: Yield (Proof)
140 MPa 20 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)
6.0 MJ/m3
Resilience: Unit (Modulus of Resilience)
130 kJ/m3
Stiffness to Weight: Axial
14 points
Stiffness to Weight: Bending
50 points
Strength to Weight: Axial
20 points
Strength to Weight: Bending
28 points
Thermal Diffusivity
66 mm2/s
Thermal Shock Resistance
8.8 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