EN AC-46400 (AISi9Cu1Mg) Cast Aluminum
EN AC-46400 aluminum is an aluminum alloy formulated for casting. 46400 is the EN numeric designation for this material. AISi9Cu1Mg is the EN chemical designation.
The properties of EN AC-46400 aluminum include two common variations. This page shows summary ranges across both of them. For more specific values, follow the links immediately below. The graph bars on the material properties cards further below compare EN AC-46400 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
77 to 120
Elastic (Young's, Tensile) Modulus
72 GPa 10 x 106 psi
Elongation at Break
1.1 to 1.7 %
Fatigue Strength
75 to 85 MPa 11 to 12 x 103 psi
Poisson's Ratio
0.33
Shear Modulus
27 GPa 3.9 x 106 psi
Tensile Strength: Ultimate (UTS)
170 to 310 MPa 25 to 45 x 103 psi
Tensile Strength: Yield (Proof)
110 to 270 MPa 16 to 39 x 103 psi
Thermal Properties
Latent Heat of Fusion
520 J/g
Maximum Temperature: Mechanical
170 °C 340 °F
Melting Completion (Liquidus)
610 °C 1120 °F
Melting Onset (Solidus)
570 °C 1060 °F
Specific Heat Capacity
890 J/kg-K 0.21 BTU/lb-°F
Thermal Conductivity
130 W/m-K 75 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
2.7 g/cm3 170 lb/ft3
Embodied Carbon
7.8 kg CO2/kg material
Embodied Energy
150 MJ/kg 62 x 103 BTU/lb
Embodied Water
1070 L/kg 130 gal/lb
Common Calculations
Resilience: Ultimate (Unit Rupture Work)
1.7 to 4.9 MJ/m3
Resilience: Unit (Modulus of Resilience)
82 to 500 kJ/m3
Stiffness to Weight: Axial
15 points
Stiffness to Weight: Bending
52 points
Strength to Weight: Axial
18 to 32 points
Strength to Weight: Bending
26 to 38 points
Thermal Diffusivity
55 mm2/s
Thermal Shock Resistance
7.8 to 14 points
Alloy Composition
Among cast aluminum alloys, the composition of EN AC-46400 aluminum is notable for including lead (Pb) and tin (Sn). Lead is used to improve machinability at the cost of toxicity and a decrease in weldability. Tin is used to increase bearing properties at the cost of a decrease in corrosion resistance.
| Al | 85.4 to 90.5 | |
| Si | 8.3 to 9.7 | |
| Cu | 0.8 to 1.3 | |
| Mg | 0.25 to 0.65 | |
| Fe | 0 to 0.8 | |
| Zn | 0 to 0.8 | |
| Mn | 0.15 to 0.55 | |
| Ni | 0 to 0.2 | |
| Ti | 0 to 0.2 | |
| Sn | 0 to 0.1 | |
| Pb | 0 to 0.1 | |
| res. | 0 to 0.25 |
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
CRC Materials Science and Engineering Handbook, 4th ed., James F. Shackelford et al. (editors), 2015