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C443.0 (C443.0-F, S5C, A34430) Cast Aluminum

C443.0 aluminum is an aluminum alloy formulated for casting. Cited properties are appropriate for the as-fabricated (no temper or treatment) condition. C443.0 is the Aluminum Association (AA) designation for this material. A34430 is the UNS number. Additionally, the SAE designation is 304. Older literature may refer to this material as ASTM S5C, but this is now discouraged.

The graph bars on the material properties cards below compare C443.0 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

65

Elastic (Young's, Tensile) Modulus

71 GPa 10 x 106 psi

Elongation at Break

9.0 %

Fatigue Strength

120 MPa 17 x 103 psi

Poisson's Ratio

0.33

Shear Modulus

27 GPa 3.9 x 106 psi

Shear Strength

130 MPa 19 x 103 psi

Tensile Strength: Ultimate (UTS)

230 MPa 33 x 103 psi

Tensile Strength: Yield (Proof)

100 MPa 15 x 103 psi

Thermal Properties

Latent Heat of Fusion

470 J/g

Maximum Temperature: Mechanical

170 °C 340 °F

Melting Completion (Liquidus)

630 °C 1160 °F

Melting Onset (Solidus)

600 °C 1120 °F

Specific Heat Capacity

900 J/kg-K 0.21 BTU/lb-°F

Thermal Conductivity

140 W/m-K 82 BTU/h-ft-°F

Thermal Expansion

22 µm/m-K

Electrical Properties

Electrical Conductivity: Equal Volume

37 % IACS

Electrical Conductivity: Equal Weight (Specific)

120 % IACS

Otherwise Unclassified Properties

Base Metal Price

9.5 % relative

Density

2.7 g/cm3 170 lb/ft3

Embodied Carbon

7.9 kg CO2/kg material

Embodied Energy

150 MJ/kg 64 x 103 BTU/lb

Embodied Water

1120 L/kg 130 gal/lb

Common Calculations

Resilience: Ultimate (Unit Rupture Work)

17 MJ/m3

Resilience: Unit (Modulus of Resilience)

70 kJ/m3

Stiffness to Weight: Axial

15 points

Stiffness to Weight: Bending

51 points

Strength to Weight: Axial

24 points

Strength to Weight: Bending

31 points

Thermal Diffusivity

58 mm2/s

Thermal Shock Resistance

10 points

Alloy Composition

Among cast aluminum alloys, the composition of C443.0 aluminum is notable for including tin (Sn). Tin is used to increase bearing properties at the cost of a decrease in corrosion resistance.

Aluminum (Al) 89.6 to 95.5
Silicon (Si) 4.5 to 6.0
Iron (Fe) 0 to 2.0
Copper (Cu) 0 to 0.6
Nickel (Ni) 0 to 0.5
Zinc (Zn) 0 to 0.5
Manganese (Mn) 0 to 0.35
Tin (Sn) 0 to 0.15
Magnesium (Mg) 0 to 0.1
Residuals 0 to 0.25

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

Followup Questions

Similar Alloys

Further Reading

ASTM B85: Standard Specification for Aluminum-Alloy Die Castings

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

ASM Specialty Handbook: Aluminum and Aluminum Alloys, J. R. Davis (editor), 1993