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EN AC-43000 (AISi10Mg(a)) Cast Aluminum

EN AC-43000 aluminum is an aluminum alloy formulated for casting. 43000 is the EN numeric designation for this material. AISi10Mg(A) is the EN chemical designation. It has a moderately high electrical conductivity among the Euronorm (EN) cast aluminums in the database.

The properties of EN AC-43000 aluminum include three common variations. This page shows summary ranges across all of them. For more specific values, follow the links immediately below. The graph bars on the material properties cards further below compare EN AC-43000 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

60 to 94

Elastic (Young's, Tensile) Modulus

71 GPa 10 x 106 psi

Elongation at Break

1.1 to 2.5 %

Fatigue Strength

68 to 76 MPa 9.9 to 11 x 103 psi

Poisson's Ratio


Shear Modulus

27 GPa 3.9 x 106 psi

Tensile Strength: Ultimate (UTS)

180 to 270 MPa 27 to 39 x 103 psi

Tensile Strength: Yield (Proof)

97 to 230 MPa 14 to 33 x 103 psi

Thermal Properties

Latent Heat of Fusion

540 J/g

Maximum Temperature: Mechanical

170 °C 340 °F

Melting Completion (Liquidus)

600 °C 1100 °F

Melting Onset (Solidus)

590 °C 1090 °F

Specific Heat Capacity

900 J/kg-K 0.22 BTU/lb-°F

Thermal Conductivity

140 W/m-K 81 BTU/h-ft-°F

Thermal Expansion

22 µm/m-K

Electrical Properties

Electrical Conductivity: Equal Volume

38 % IACS

Electrical Conductivity: Equal Weight (Specific)

130 % IACS

Otherwise Unclassified Properties

Base Metal Price

9.5 % relative


2.6 g/cm3 160 lb/ft3

Embodied Carbon

7.8 kg CO2/kg material

Embodied Energy

150 MJ/kg 63 x 103 BTU/lb

Embodied Water

1070 L/kg 130 gal/lb

Common Calculations

Resilience: Ultimate (Unit Rupture Work)

2.9 to 5.7 MJ/m3

Resilience: Unit (Modulus of Resilience)

66 to 360 kJ/m3

Stiffness to Weight: Axial

15 points

Stiffness to Weight: Bending

54 points

Strength to Weight: Axial

20 to 29 points

Strength to Weight: Bending

28 to 36 points

Thermal Diffusivity

60 mm2/s

Thermal Shock Resistance

8.6 to 12 points

Alloy Composition

Among cast aluminum alloys, the composition of EN AC-43000 aluminum is notable for including lead (Pb) and containing a comparatively high amount of silicon (Si). Lead is used to improve machinability at the cost of toxicity and a decrease in weldability. Silicon is used to improve casting fluidity and lower melting temperature. It also has a strengthening effect.

Aluminum (Al)Al 87 to 90.8
Silicon (Si)Si 9.0 to 11
Magnesium (Mg)Mg 0.2 to 0.45
Iron (Fe)Fe 0 to 0.55
Manganese (Mn)Mn 0 to 0.45
Titanium (Ti)Ti 0 to 0.15
Zinc (Zn)Zn 0 to 0.1
Nickel (Ni)Ni 0 to 0.050
Tin (Sn)Sn 0 to 0.050
Lead (Pb)Pb 0 to 0.050
Copper (Cu)Cu 0 to 0.050
Residualsres. 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

Handbook of Aluminum vol. 2: Alloy Production and Materials Manufacturing, George Totten and D. Scott MacKenzie (editors), 2003