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1070-H18 Aluminum

1070-H18 aluminum is 1070 aluminum in the H18 temper. This is the strongest temper normally produced through the action of only strain hardening. It has the highest strength compared to the other variants of 1070 aluminum.

The graph bars on the material properties cards below compare 1070-H18 aluminum to: 1000-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

Elastic (Young's, Tensile) Modulus

68 GPa 9.9 x 106 psi

Elongation at Break

4.5 %

Fatigue Strength

46 MPa 6.7 x 103 psi

Poisson's Ratio

0.33

Shear Modulus

26 GPa 3.7 x 106 psi

Shear Strength

79 MPa 11 x 103 psi

Tensile Strength: Ultimate (UTS)

140 MPa 20 x 103 psi

Tensile Strength: Yield (Proof)

120 MPa 17 x 103 psi

Thermal Properties

Latent Heat of Fusion

400 J/g

Maximum Temperature: Mechanical

170 °C 340 °F

Melting Completion (Liquidus)

640 °C 1190 °F

Melting Onset (Solidus)

640 °C 1180 °F

Specific Heat Capacity

900 J/kg-K 0.22 BTU/lb-°F

Thermal Conductivity

230 W/m-K 130 BTU/h-ft-°F

Thermal Expansion

23 µm/m-K

Electrical Properties

Electrical Conductivity: Equal Volume

61 % IACS

Electrical Conductivity: Equal Weight (Specific)

200 % IACS

Otherwise Unclassified Properties

Base Metal Price

9.5 % relative

Density

2.7 g/cm3 170 lb/ft3

Embodied Carbon

8.3 kg CO2/kg material

Embodied Energy

160 MJ/kg 67 x 103 BTU/lb

Embodied Water

1200 L/kg 140 gal/lb

Common Calculations

Resilience: Ultimate (Unit Rupture Work)

5.9 MJ/m3

Resilience: Unit (Modulus of Resilience)

110 kJ/m3

Stiffness to Weight: Axial

14 points

Stiffness to Weight: Bending

50 points

Strength to Weight: Axial

14 points

Strength to Weight: Bending

22 points

Thermal Diffusivity

94 mm2/s

Thermal Shock Resistance

6.1 points

Alloy Composition

Aluminum (Al)Al 99.7 to 100
Iron (Fe)Fe 0 to 0.25
Silicon (Si)Si 0 to 0.2
Vanadium (V)V 0 to 0.050
Zinc (Zn)Zn 0 to 0.040
Copper (Cu)Cu 0 to 0.040
Manganese (Mn)Mn 0 to 0.030
Titanium (Ti)Ti 0 to 0.030
Magnesium (Mg)Mg 0 to 0.030
Residualsres. 0 to 0.030

All values are % weight. Ranges represent what is permitted under applicable standards.

Followup Questions

Further Reading

Handbook of Aluminum Bonding Technology and Data, J. D. Minford, 1993

Aluminum: Properties and Physical Metallurgy, John E. Hatch (editor), 1984

ISO 6361-2: Wrought aluminium and aluminium alloys - Sheets, strips and plates - Part 2: Mechanical properties

Properties and Selection: Nonferrous Alloys and Special-Purpose Materials, ASM Handbook vol. 2, ASM International, 1993