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296.0 (A02960) Cast Aluminum

296.0 aluminum is an aluminum alloy formulated for casting. 296.0 is the Aluminum Association (AA) designation for this material. A02960 is the UNS number. Additionally, the SAE designation is 380.

The properties of 296.0 aluminum include three common variations. This page shows summary ranges across all of them. For more specific values, follow the links immediately below. The graph bars on the material properties cards further below compare 296.0 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

Brinell Hardness

75 to 90

Elastic (Young's, Tensile) Modulus

72 GPa 10 x 106 psi

Elongation at Break

3.2 to 7.1 %

Fatigue Strength

47 to 70 MPa 6.9 to 10 x 103 psi

Poisson's Ratio

0.33

Shear Modulus

27 GPa 3.9 x 106 psi

Tensile Strength: Ultimate (UTS)

260 to 270 MPa 38 to 40 x 103 psi

Tensile Strength: Yield (Proof)

120 to 180 MPa 18 to 26 x 103 psi

Thermal Properties

Latent Heat of Fusion

420 J/g

Maximum Temperature: Mechanical

170 °C 340 °F

Melting Completion (Liquidus)

630 °C 1170 °F

Melting Onset (Solidus)

540 °C 1000 °F

Specific Heat Capacity

870 J/kg-K 0.21 BTU/lb-°F

Thermal Conductivity

130 to 150 W/m-K 77 to 85 BTU/h-ft-°F

Thermal Expansion

22 µm/m-K

Electrical Properties

Electrical Conductivity: Equal Volume

33 to 37 % IACS

Electrical Conductivity: Equal Weight (Specific)

99 to 110 % IACS

Otherwise Unclassified Properties

Base Metal Price

11 % relative

Density

3.0 g/cm3 190 lb/ft3

Embodied Carbon

7.8 kg CO2/kg material

Embodied Energy

150 MJ/kg 63 x 103 BTU/lb

Embodied Water

1110 L/kg 130 gal/lb

Common Calculations

Resilience: Ultimate (Unit Rupture Work)

7.6 to 15 MJ/m3

Resilience: Unit (Modulus of Resilience)

110 to 220 kJ/m3

Stiffness to Weight: Axial

13 points

Stiffness to Weight: Bending

46 points

Strength to Weight: Axial

24 to 25 points

Strength to Weight: Bending

30 to 31 points

Thermal Diffusivity

51 to 56 mm2/s

Thermal Shock Resistance

12 points

Alloy Composition

Among cast aluminum alloys, the composition of 296.0 aluminum is notable for containing a comparatively high amount of copper (Cu). Copper is used to improve strength. This comes at the cost of a decrease in corrosion resistance and weldability.

Aluminum (Al) 89 to 94
Copper (Cu) 4.0 to 5.0
Silicon (Si) 2.0 to 3.0
Iron (Fe) 0 to 1.2
Zinc (Zn) 0 to 0.5
Manganese (Mn) 0 to 0.35
Nickel (Ni) 0 to 0.35
Titanium (Ti) 0 to 0.25
Magnesium (Mg) 0 to 0.050
Residuals 0 to 0.35

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

Followup Questions

Similar Alloys

Further Reading

ASTM B108: Standard Specification for Aluminum-Alloy Permanent Mold Castings

Iron in Aluminium Alloys: Impurity and Alloying Element, N. A. Belov et al., 2002

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