EN AC-45100 (AISi5Cu3Mg) Cast Aluminum
EN AC-45100 aluminum is an aluminum alloy formulated for casting. 45100 is the EN numeric designation for this material. AISi5Cu3Mg is the EN chemical designation.
It can have a fairly high tensile strength among Euronorm (EN) cast aluminums. In addition, it has a moderately high density and a moderately low melting temperature.
The properties of EN AC-45100 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-45100 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
97 to 130
Elastic (Young's, Tensile) Modulus
72 GPa 10 x 106 psi
Elongation at Break
1.0 to 2.8 %
Fatigue Strength
82 to 99 MPa 12 to 14 x 103 psi
Poisson's Ratio
0.33
Shear Modulus
27 GPa 3.9 x 106 psi
Tensile Strength: Ultimate (UTS)
300 to 360 MPa 44 to 52 x 103 psi
Tensile Strength: Yield (Proof)
210 to 320 MPa 30 to 46 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)
550 °C 1030 °F
Specific Heat Capacity
890 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
7.9 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)
3.5 to 7.6 MJ/m3
Resilience: Unit (Modulus of Resilience)
290 to 710 kJ/m3
Stiffness to Weight: Axial
14 points
Stiffness to Weight: Bending
49 points
Strength to Weight: Axial
30 to 35 points
Strength to Weight: Bending
35 to 39 points
Thermal Diffusivity
54 mm2/s
Thermal Shock Resistance
14 to 16 points
Alloy Composition
Among cast aluminum alloys, the composition of EN AC-45100 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.
| Al | 88 to 92.8 | |
| Si | 4.5 to 6.0 | |
| Cu | 2.6 to 3.6 | |
| Fe | 0 to 0.6 | |
| Mg | 0.15 to 0.45 | |
| Mn | 0 to 0.55 | |
| Ti | 0 to 0.25 | |
| Zn | 0 to 0.2 | |
| Ni | 0 to 0.1 | |
| Pb | 0 to 0.1 | |
| Sn | 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
Aluminum: Properties and Physical Metallurgy, John E. Hatch (editor), 1984