EN AC-44400 (44400-F, AISi9) Cast Aluminum
EN AC-44400 aluminum is an aluminum alloy formulated for casting. Cited properties are appropriate for the as-fabricated (no temper or treatment) condition. 44400 is the EN numeric designation for this material. AISi9 is the EN chemical designation.
It has a moderately high ductility and a moderately low tensile strength among Euronorm (EN) cast aluminums.
The graph bars on the material properties cards below compare EN AC-44400 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
61
Elastic (Young's, Tensile) Modulus
71 GPa 10 x 106 psi
Elongation at Break
4.1 %
Fatigue Strength
79 MPa 12 x 103 psi
Poisson's Ratio
0.33
Shear Modulus
27 GPa 3.9 x 106 psi
Tensile Strength: Ultimate (UTS)
210 MPa 31 x 103 psi
Tensile Strength: Yield (Proof)
110 MPa 16 x 103 psi
Thermal Properties
Latent Heat of Fusion
540 J/g
Maximum Temperature: Mechanical
170 °C 340 °F
Melting Completion (Liquidus)
600 °C 1110 °F
Melting Onset (Solidus)
590 °C 1100 °F
Specific Heat Capacity
900 J/kg-K 0.22 BTU/lb-°F
Thermal Conductivity
140 W/m-K 80 BTU/h-ft-°F
Thermal Expansion
22 µm/m-K
Electrical Properties
Electrical Conductivity: Equal Volume
33 % IACS
Electrical Conductivity: Equal Weight (Specific)
110 % IACS
Otherwise Unclassified Properties
Base Metal Price
9.5 % relative
Density
2.6 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
1080 L/kg 130 gal/lb
Common Calculations
Resilience: Ultimate (Unit Rupture Work)
7.3 MJ/m3
Resilience: Unit (Modulus of Resilience)
85 kJ/m3
Stiffness to Weight: Axial
15 points
Stiffness to Weight: Bending
54 points
Strength to Weight: Axial
23 points
Strength to Weight: Bending
31 points
Thermal Diffusivity
60 mm2/s
Thermal Shock Resistance
9.8 points
Alloy Composition
Among cast aluminum alloys, the composition of EN AC-44400 aluminum is notable for including lead (Pb) and containing a comparatively high amount of silicon (Si). Lead is used to improve machinability at the cost of toxicity and a decrease in weldability. Silicon is used to improve casting fluidity and lower melting temperature. It also has a strengthening effect.
| Al | 87.1 to 92 | |
| Si | 8.0 to 11 | |
| Fe | 0 to 0.65 | |
| Mn | 0 to 0.5 | |
| Ti | 0 to 0.15 | |
| Zn | 0 to 0.15 | |
| Cu | 0 to 0.1 | |
| Mg | 0 to 0.1 | |
| Ni | 0 to 0.050 | |
| Sn | 0 to 0.050 | |
| Pb | 0 to 0.050 | |
| res. | 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 Bonding Technology and Data, J. D. Minford, 1993