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224.0-T7 Cast Aluminum

224.0-T7 aluminum is 224.0 aluminum in the T7 temper. To achieve this temper, the metal is solution heat-treated and stabilized by artificial overaging. The graph bars on the material properties cards below compare 224.0-T7 aluminum to: ANSI/AA cast aluminums (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

71 GPa 10 x 106 psi

Elongation at Break

4.0 %

Fatigue Strength

86 MPa 12 x 103 psi

Poisson's Ratio

0.33

Shear Modulus

27 GPa 3.9 x 106 psi

Tensile Strength: Ultimate (UTS)

420 MPa 61 x 103 psi

Tensile Strength: Yield (Proof)

330 MPa 48 x 103 psi

Thermal Properties

Latent Heat of Fusion

390 J/g

Maximum Temperature: Mechanical

220 °C 420 °F

Melting Completion (Liquidus)

650 °C 1190 °F

Melting Onset (Solidus)

550 °C 1020 °F

Specific Heat Capacity

870 J/kg-K 0.21 BTU/lb-°F

Thermal Conductivity

120 W/m-K 72 BTU/h-ft-°F

Thermal Expansion

23 µm/m-K

Electrical Properties

Electrical Conductivity: Equal Volume

32 % IACS

Electrical Conductivity: Equal Weight (Specific)

95 % IACS

Otherwise Unclassified Properties

Base Metal Price

11 % relative

Density

3.0 g/cm3 190 lb/ft3

Embodied Carbon

8.3 kg CO2/kg material

Embodied Energy

160 MJ/kg 67 x 103 BTU/lb

Embodied Water

1150 L/kg 140 gal/lb

Common Calculations

Resilience: Ultimate (Unit Rupture Work)

16 MJ/m3

Resilience: Unit (Modulus of Resilience)

770 kJ/m3

Stiffness to Weight: Axial

13 points

Stiffness to Weight: Bending

45 points

Strength to Weight: Axial

38 points

Strength to Weight: Bending

41 points

Thermal Diffusivity

47 mm2/s

Thermal Shock Resistance

18 points

Alloy Composition

Aluminum (Al) 93 to 95.2
Copper (Cu) 4.5 to 5.5
Manganese (Mn) 0.2 to 0.5
Titanium (Ti) 0 to 0.35
Zirconium (Zr) 0.1 to 0.25
Vanadium (V) 0.050 to 0.15
Iron (Fe) 0 to 0.1
Silicon (Si) 0 to 0.060
Residuals 0 to 0.1

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

CRC Materials Science and Engineering Handbook, 4th ed., James F. Shackelford et al. (editors), 2015