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EN AC-44100 (44100-F, AISi12(b)) Cast Aluminum

EN AC-44100 aluminum is an aluminum alloy formulated for casting. Cited properties are appropriate for the as-fabricated (no temper or treatment) condition. 44100 is the EN numeric designation for this material. AISi12(b) is the EN chemical designation.

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

The graph bars on the material properties cards below compare EN AC-44100 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

59

Elastic (Young's, Tensile) Modulus

72 GPa 10 x 106 psi

Elongation at Break

4.9 %

Fatigue Strength

64 MPa 9.2 x 103 psi

Poisson's Ratio

0.33

Shear Modulus

27 GPa 3.9 x 106 psi

Tensile Strength: Ultimate (UTS)

180 MPa 25 x 103 psi

Tensile Strength: Yield (Proof)

87 MPa 13 x 103 psi

Thermal Properties

Latent Heat of Fusion

570 J/g

Maximum Temperature: Mechanical

170 °C 340 °F

Melting Completion (Liquidus)

590 °C 1090 °F

Melting Onset (Solidus)

580 °C 1080 °F

Specific Heat Capacity

900 J/kg-K 0.22 BTU/lb-°F

Thermal Conductivity

130 W/m-K 77 BTU/h-ft-°F

Thermal Expansion

21 µm/m-K

Electrical Properties

Electrical Conductivity: Equal Volume

34 % IACS

Electrical Conductivity: Equal Weight (Specific)

120 % IACS

Otherwise Unclassified Properties

Base Metal Price

9.5 % relative

Density

2.5 g/cm3 160 lb/ft3

Embodied Carbon

7.7 kg CO2/kg material

Embodied Energy

140 MJ/kg 62 x 103 BTU/lb

Embodied Water

1050 L/kg 130 gal/lb

Common Calculations

Resilience: Ultimate (Unit Rupture Work)

7.1 MJ/m3

Resilience: Unit (Modulus of Resilience)

53 kJ/m3

Stiffness to Weight: Axial

16 points

Stiffness to Weight: Bending

55 points

Strength to Weight: Axial

19 points

Strength to Weight: Bending

27 points

Thermal Diffusivity

58 mm2/s

Thermal Shock Resistance

8.2 points

Alloy Composition

Among cast aluminum alloys, the composition of EN AC-44100 aluminum is notable for containing a comparatively high amount of silicon (Si) and including lead (Pb). Silicon is used to improve casting fluidity and lower melting temperature. It also has a strengthening effect. Lead is used to improve machinability at the cost of toxicity and a decrease in weldability.

Aluminum (Al) 84.4 to 89.5
Silicon (Si) 10.5 to 13.5
Iron (Fe) 0 to 0.65
Manganese (Mn) 0 to 0.55
Titanium (Ti) 0 to 0.2
Zinc (Zn) 0 to 0.15
Copper (Cu) 0 to 0.15
Nickel (Ni) 0 to 0.1
Lead (Pb) 0 to 0.1
Magnesium (Mg) 0 to 0.1
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

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