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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

Aluminum (Al)Al 94.6 to 97.4
Silicon (Si)Si 1.8 to 2.2
Manganese (Mn)Mn 0.6 to 1.2
Iron (Fe)Fe 0 to 0.7
Copper (Cu)Cu 0.1 to 0.5
Magnesium (Mg)Mg 0.1 to 0.5
Zinc (Zn)Zn 0 to 0.2
Residualsres. 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