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EN AC-45400 (45400-T4, AISi5Cu3) Cast Aluminum

EN AC-45400 aluminum is an aluminum alloy formulated for casting. Cited properties are appropriate for the T4 temper. To achieve this temper, the metal is solution heat-treated and naturally aged. 45400 is the EN numeric designation for this material. AISi5Cu3 is the EN chemical designation.

It has a fairly high ductility among Euronorm (EN) cast aluminums. In addition, it has a moderately high density and a moderately low electrical conductivity.

The graph bars on the material properties cards below compare EN AC-45400 aluminum to: Euronorm (EN) 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

86

Elastic (Young's, Tensile) Modulus

72 GPa 10 x 106 psi

Elongation at Break

6.7 %

Fatigue Strength

55 MPa 8.0 x 103 psi

Poisson's Ratio

0.33

Shear Modulus

27 GPa 3.9 x 106 psi

Tensile Strength: Ultimate (UTS)

260 MPa 37 x 103 psi

Tensile Strength: Yield (Proof)

130 MPa 18 x 103 psi

Thermal Properties

Latent Heat of Fusion

470 J/g

Maximum Temperature: Mechanical

170 °C 340 °F

Melting Completion (Liquidus)

630 °C 1170 °F

Melting Onset (Solidus)

560 °C 1030 °F

Specific Heat Capacity

880 J/kg-K 0.21 BTU/lb-°F

Thermal Conductivity

140 W/m-K 79 BTU/h-ft-°F

Thermal Expansion

22 µm/m-K

Electrical Properties

Electrical Conductivity: Equal Volume

30 % IACS

Electrical Conductivity: Equal Weight (Specific)

95 % IACS

Otherwise Unclassified Properties

Base Metal Price

10 % relative

Density

2.8 g/cm3 180 lb/ft3

Embodied Carbon

7.8 kg CO2/kg material

Embodied Energy

150 MJ/kg 63 x 103 BTU/lb

Embodied Water

1100 L/kg 130 gal/lb

Common Calculations

Resilience: Ultimate (Unit Rupture Work)

14 MJ/m3

Resilience: Unit (Modulus of Resilience)

110 kJ/m3

Stiffness to Weight: Axial

14 points

Stiffness to Weight: Bending

49 points

Strength to Weight: Axial

25 points

Strength to Weight: Bending

32 points

Thermal Diffusivity

54 mm2/s

Thermal Shock Resistance

12 points

Alloy Composition

Among cast aluminum alloys, the composition of EN AC-45400 aluminum is notable for including lead (Pb) and containing a comparatively high amount of copper (Cu). Lead is used to improve machinability at the cost of toxicity and a decrease in weldability. Copper is used to improve strength. This comes at the cost of a decrease in corrosion resistance and weldability.

Aluminum (Al) 88.4 to 92.9
Silicon (Si) 4.5 to 6.0
Copper (Cu) 2.6 to 3.6
Iron (Fe) 0 to 0.6
Manganese (Mn) 0 to 0.55
Titanium (Ti) 0 to 0.25
Zinc (Zn) 0 to 0.2
Nickel (Ni) 0 to 0.1
Lead (Pb) 0 to 0.1
Tin (Sn) 0 to 0.050
Magnesium (Mg) 0 to 0.050
Residuals 0 to 0.15

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

Followup Questions

Similar Alloys

Further Reading

EN 1706: Aluminium and aluminium alloys. Castings. Chemical composition and mechanical properties

Handbook of Aluminum vol. 2: Alloy Production and Materials Manufacturing, George Totten and D. Scott MacKenzie (editors), 2003