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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

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