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EN AC-48100 (AISi17Cu4Mg) Cast Aluminum

EN AC-48100 aluminum is an aluminum alloy formulated for casting. 48100 is the EN numeric designation for this material. AISi17Cu4Mg is the EN chemical designation.

It has the lowest melting temperature among Euronorm (EN) cast aluminums. In addition, it has a moderately low electrical conductivity and a moderately high density.

The properties of EN AC-48100 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-48100 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

100 to 140

Elastic (Young's, Tensile) Modulus

76 GPa 11 x 106 psi

Elongation at Break

1.1 %

Fatigue Strength

120 to 130 MPa 18 to 19 x 103 psi

Poisson's Ratio


Shear Modulus

29 GPa 4.1 x 106 psi

Tensile Strength: Ultimate (UTS)

240 to 330 MPa 34 to 48 x 103 psi

Tensile Strength: Yield (Proof)

190 to 300 MPa 28 to 43 x 103 psi

Thermal Properties

Latent Heat of Fusion

640 J/g

Maximum Temperature: Mechanical

170 °C 340 °F

Melting Completion (Liquidus)

580 °C 1080 °F

Melting Onset (Solidus)

470 °C 880 °F

Specific Heat Capacity

880 J/kg-K 0.21 BTU/lb-°F

Thermal Conductivity

130 W/m-K 77 BTU/h-ft-°F

Thermal Expansion

20 µm/m-K

Electrical Properties

Electrical Conductivity: Equal Volume

27 % IACS

Electrical Conductivity: Equal Weight (Specific)

87 % IACS

Otherwise Unclassified Properties

Base Metal Price

11 % relative


2.8 g/cm3 170 lb/ft3

Embodied Carbon

7.3 kg CO2/kg material

Embodied Energy

130 MJ/kg 58 x 103 BTU/lb

Embodied Water

940 L/kg 110 gal/lb

Common Calculations

Resilience: Ultimate (Unit Rupture Work)

2.3 to 3.6 MJ/m3

Resilience: Unit (Modulus of Resilience)

250 to 580 kJ/m3

Stiffness to Weight: Axial

15 points

Stiffness to Weight: Bending

51 points

Strength to Weight: Axial

24 to 33 points

Strength to Weight: Bending

31 to 38 points

Thermal Diffusivity

55 mm2/s

Thermal Shock Resistance

11 to 16 points

Alloy Composition

Among cast aluminum alloys, the composition of EN AC-48100 aluminum is notable for containing comparatively high amounts of silicon (Si) and copper (Cu). Silicon is used to improve casting fluidity and lower melting temperature. It also has a strengthening effect. Copper is used to improve strength. This comes at the cost of a decrease in corrosion resistance and weldability.

Aluminum (Al)Al 72.1 to 79.8
Silicon (Si)Si 16 to 18
Copper (Cu)Cu 4.0 to 5.0
Zinc (Zn)Zn 0 to 1.5
Iron (Fe)Fe 0 to 1.3
Magnesium (Mg)Mg 0.25 to 0.65
Manganese (Mn)Mn 0 to 0.5
Nickel (Ni)Ni 0 to 0.3
Titanium (Ti)Ti 0 to 0.25
Tin (Sn)Sn 0 to 0.15
Residualsres. 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

Iron in Aluminium Alloys: Impurity and Alloying Element, N. A. Belov et al., 2002