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EN AC-44000 (44000-F, AISi11) Cast Aluminum

EN AC-44000 aluminum is an aluminum alloy formulated for casting. Cited properties are appropriate for the as-fabricated (no temper or treatment) condition. 44000 is the EN numeric designation for this material. AISi11 is the EN chemical designation.

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

The graph bars on the material properties cards below compare EN AC-44000 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

51

Elastic (Young's, Tensile) Modulus

71 GPa 10 x 106 psi

Elongation at Break

7.3 %

Fatigue Strength

64 MPa 9.3 x 103 psi

Poisson's Ratio

0.33

Shear Modulus

27 GPa 3.9 x 106 psi

Tensile Strength: Ultimate (UTS)

180 MPa 26 x 103 psi

Tensile Strength: Yield (Proof)

86 MPa 12 x 103 psi

Thermal Properties

Latent Heat of Fusion

560 J/g

Maximum Temperature: Mechanical

170 °C 340 °F

Melting Completion (Liquidus)

590 °C 1090 °F

Melting Onset (Solidus)

590 °C 1090 °F

Specific Heat Capacity

910 J/kg-K 0.22 BTU/lb-°F

Thermal Conductivity

140 W/m-K 81 BTU/h-ft-°F

Thermal Expansion

21 µm/m-K

Electrical Properties

Electrical Conductivity: Equal Volume

36 % IACS

Electrical Conductivity: Equal Weight (Specific)

130 % IACS

Otherwise Unclassified Properties

Base Metal Price

9.5 % relative

Density

2.5 g/cm3 160 lb/ft3

Embodied Carbon

7.8 kg CO2/kg material

Embodied Energy

150 MJ/kg 63 x 103 BTU/lb

Embodied Water

1070 L/kg 130 gal/lb

Common Calculations

Resilience: Ultimate (Unit Rupture Work)

11 MJ/m3

Resilience: Unit (Modulus of Resilience)

51 kJ/m3

Stiffness to Weight: Axial

16 points

Stiffness to Weight: Bending

55 points

Strength to Weight: Axial

20 points

Strength to Weight: Bending

28 points

Thermal Diffusivity

61 mm2/s

Thermal Shock Resistance

8.4 points

Alloy Composition

Among cast aluminum alloys, the composition of EN AC-44000 aluminum is notable for containing a comparatively high amount of silicon (Si). Silicon is used to improve casting fluidity and lower melting temperature. It also has a strengthening effect.

Aluminum (Al) 87.1 to 90
Silicon (Si) 10 to 11.8
Magnesium (Mg) 0 to 0.45
Iron (Fe) 0 to 0.19
Titanium (Ti) 0 to 0.15
Manganese (Mn) 0 to 0.1
Zinc (Zn) 0 to 0.070
Copper (Cu) 0 to 0.050
Residuals 0 to 0.1

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