EN AC-45300 (AlSi5Cu1Mg) Cast Aluminum
EN AC-45300 aluminum is an aluminum alloy formulated for casting. 45300 is the EN numeric designation for this material. AlSi5Cu1Mg is the EN chemical designation. It has a moderately high thermal conductivity and a moderately high electrical conductivity among Euronorm (EN) cast aluminums.
The properties of EN AC-45300 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-45300 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
94 to 120
Elastic (Young's, Tensile) Modulus
71 GPa 10 x 106 psi
Elongation at Break
1.0 to 2.8 %
Fatigue Strength
59 to 72 MPa 8.6 to 11 x 103 psi
Poisson's Ratio
0.33
Shear Modulus
27 GPa 3.9 x 106 psi
Tensile Strength: Ultimate (UTS)
220 to 290 MPa 32 to 41 x 103 psi
Tensile Strength: Yield (Proof)
150 to 230 MPa 21 to 34 x 103 psi
Thermal Properties
Latent Heat of Fusion
470 J/g
Maximum Temperature: Mechanical
170 °C 340 °F
Melting Completion (Liquidus)
630 °C 1160 °F
Melting Onset (Solidus)
590 °C 1090 °F
Specific Heat Capacity
890 J/kg-K 0.21 BTU/lb-°F
Thermal Conductivity
150 W/m-K 85 BTU/h-ft-°F
Thermal Expansion
22 µm/m-K
Electrical Properties
Electrical Conductivity: Equal Volume
36 % IACS
Electrical Conductivity: Equal Weight (Specific)
120 % IACS
Otherwise Unclassified Properties
Base Metal Price
9.5 % relative
Density
2.7 g/cm3 170 lb/ft3
Embodied Carbon
8.0 kg CO2/kg material
Embodied Energy
150 MJ/kg 64 x 103 BTU/lb
Embodied Water
1120 L/kg 130 gal/lb
Common Calculations
Resilience: Ultimate (Unit Rupture Work)
2.7 to 5.6 MJ/m3
Resilience: Unit (Modulus of Resilience)
160 to 390 kJ/m3
Stiffness to Weight: Axial
14 points
Stiffness to Weight: Bending
50 points
Strength to Weight: Axial
23 to 29 points
Strength to Weight: Bending
30 to 35 points
Thermal Diffusivity
60 mm2/s
Thermal Shock Resistance
10 to 13 points
Alloy Composition
Among cast aluminum alloys, the composition of EN AC-45300 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 | 90.2 to 94.2 | |
| Si | 4.5 to 5.5 | |
| Cu | 1.0 to 1.5 | |
| Mg | 0.35 to 0.65 | |
| Fe | 0 to 0.65 | |
| Mn | 0 to 0.55 | |
| Ni | 0 to 0.25 | |
| Ti | 0 to 0.25 | |
| Pb | 0 to 0.15 | |
| Zn | 0 to 0.15 | |
| 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
CRC Materials Science and Engineering Handbook, 4th ed., James F. Shackelford et al. (editors), 2015