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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.

Aluminum (Al) 88 to 92.8
Silicon (Si) 4.5 to 6.0
Copper (Cu) 2.6 to 3.6
Iron (Fe) 0 to 0.6
Magnesium (Mg) 0.15 to 0.45
Manganese (Mn) 0 to 0.55
Titanium (Ti) 0 to 0.25
Zinc (Zn) 0 to 0.2
Nickel (Ni) 0 to 0.1
Lead (Pb) 0 to 0.1
Tin (Sn) 0 to 0.050
Residuals 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