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1085-H12 Aluminum

1085-H12 aluminum is 1085 aluminum in the H12 temper. To achieve this temper, the metal is strain hardened to a strength that is roughly a quarter of the way between annealed (O) and full-hard (H18). The graph bars on the material properties cards below compare 1085-H12 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

10 %

Fatigue Strength

48 MPa 6.9 x 103 psi

Poisson's Ratio

0.33

Shear Modulus

26 GPa 3.7 x 106 psi

Shear Strength

53 MPa 7.6 x 103 psi

Tensile Strength: Ultimate (UTS)

88 MPa 13 x 103 psi

Tensile Strength: Yield (Proof)

63 MPa 9.1 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)

8.0 MJ/m3

Resilience: Unit (Modulus of Resilience)

29 kJ/m3

Stiffness to Weight: Axial

14 points

Stiffness to Weight: Bending

50 points

Strength to Weight: Axial

9.1 points

Strength to Weight: Bending

16 points

Thermal Diffusivity

94 mm2/s

Thermal Shock Resistance

3.9 points

Alloy Composition

Aluminum (Al)Al 99.85 to 100
Iron (Fe)Fe 0 to 0.12
Silicon (Si)Si 0 to 0.1
Vanadium (V)V 0 to 0.050
Zinc (Zn)Zn 0 to 0.030
Copper (Cu)Cu 0 to 0.030
Gallium (Ga)Ga 0 to 0.030
Manganese (Mn)Mn 0 to 0.020
Titanium (Ti)Ti 0 to 0.020
Magnesium (Mg)Mg 0 to 0.020
Residualsres. 0 to 0.010

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

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

EN 573-3: Aluminium and aluminium alloys. Chemical composition and form of wrought products. Chemical composition and form of products

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