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EN AC-43300 (AISi9Mg) Cast Aluminum

EN AC-43300 aluminum is an aluminum alloy formulated for casting. 43300 is the EN numeric designation for this material. AISi9Mg is the EN chemical designation.

It has a fairly low density among Euronorm (EN) cast aluminums. In addition, it has a fairly high electrical conductivity and can have a moderately high tensile strength.

The properties of EN AC-43300 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-43300 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

91 to 94

Elastic (Young's, Tensile) Modulus

71 GPa 10 x 106 psi

Elongation at Break

3.4 to 6.7 %

Fatigue Strength

76 to 77 MPa 11 x 103 psi

Poisson's Ratio

0.33

Shear Modulus

27 GPa 3.9 x 106 psi

Tensile Strength: Ultimate (UTS)

280 to 290 MPa 41 to 42 x 103 psi

Tensile Strength: Yield (Proof)

210 to 230 MPa 30 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 1110 °F

Melting Onset (Solidus)

590 °C 1100 °F

Specific Heat Capacity

910 J/kg-K 0.22 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

40 % IACS

Electrical Conductivity: Equal Weight (Specific)

140 % IACS

Otherwise Unclassified Properties

Base Metal Price

9.5 % relative

Density

2.5 g/cm3 160 lb/ft3

Embodied Carbon

7.9 kg CO2/kg material

Embodied Energy

150 MJ/kg 63 x 103 BTU/lb

Embodied Water

1080 L/kg 130 gal/lb

Common Calculations

Resilience: Ultimate (Unit Rupture Work)

9.1 to 17 MJ/m3

Resilience: Unit (Modulus of Resilience)

300 to 370 kJ/m3

Stiffness to Weight: Axial

15 points

Stiffness to Weight: Bending

54 points

Strength to Weight: Axial

31 to 32 points

Strength to Weight: Bending

37 to 38 points

Thermal Diffusivity

59 mm2/s

Thermal Shock Resistance

13 to 14 points

Alloy Composition

Among cast aluminum alloys, the composition of EN AC-43300 aluminum is notable for containing a comparatively high amount of silicon (Si). Silicon is used to improve casting fluidity and lower melting temperature. It also has a strengthening effect.

Aluminum (Al) 88.9 to 90.8
Silicon (Si) 9.0 to 10
Magnesium (Mg) 0.25 to 0.45
Iron (Fe) 0 to 0.19
Titanium (Ti) 0 to 0.15
Manganese (Mn) 0 to 0.1
Zinc (Zn) 0 to 0.070
Copper (Cu) 0 to 0.050
Residuals 0 to 0.1

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