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EN AC-51100 (51100-F, AIMg3) Cast Aluminum

EN AC-51100 aluminum is an aluminum alloy formulated for casting. Cited properties are appropriate for the as-fabricated (no temper or treatment) condition. 51100 is the EN numeric designation for this material. AIMg3 is the EN chemical designation.

It has the lowest tensile strength among Euronorm (EN) cast aluminums. In addition, it has a very high melting temperature and a moderately high ductility.

The graph bars on the material properties cards below compare EN AC-51100 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

57

Elastic (Young's, Tensile) Modulus

68 GPa 9.9 x 106 psi

Elongation at Break

4.5 %

Fatigue Strength

58 MPa 8.4 x 103 psi

Poisson's Ratio

0.33

Shear Modulus

26 GPa 3.7 x 106 psi

Tensile Strength: Ultimate (UTS)

160 MPa 24 x 103 psi

Tensile Strength: Yield (Proof)

80 MPa 12 x 103 psi

Thermal Properties

Latent Heat of Fusion

400 J/g

Maximum Temperature: Mechanical

170 °C 340 °F

Melting Completion (Liquidus)

640 °C 1190 °F

Melting Onset (Solidus)

620 °C 1150 °F

Specific Heat Capacity

900 J/kg-K 0.22 BTU/lb-°F

Thermal Conductivity

130 W/m-K 75 BTU/h-ft-°F

Thermal Expansion

23 µm/m-K

Electrical Properties

Electrical Conductivity: Equal Volume

34 % IACS

Electrical Conductivity: Equal Weight (Specific)

110 % IACS

Otherwise Unclassified Properties

Base Metal Price

9.5 % relative

Density

2.7 g/cm3 170 lb/ft3

Embodied Carbon

8.7 kg CO2/kg material

Embodied Energy

150 MJ/kg 66 x 103 BTU/lb

Embodied Water

1180 L/kg 140 gal/lb

Common Calculations

Resilience: Ultimate (Unit Rupture Work)

6.0 MJ/m3

Resilience: Unit (Modulus of Resilience)

47 kJ/m3

Stiffness to Weight: Axial

14 points

Stiffness to Weight: Bending

51 points

Strength to Weight: Axial

17 points

Strength to Weight: Bending

25 points

Thermal Diffusivity

53 mm2/s

Thermal Shock Resistance

7.3 points

Alloy Composition

Among cast aluminum alloys, the composition of EN AC-51100 aluminum is notable for containing a comparatively high amount of magnesium (Mg). Magnesium promotes hardenability through both heat treatment and strain hardening mechanisms. It also increases susceptibility to intergranular corrosion.

Aluminum (Al) 94.5 to 97.5
Magnesium (Mg) 2.5 to 3.5
Silicon (Si) 0 to 0.55
Iron (Fe) 0 to 0.55
Manganese (Mn) 0 to 0.45
Titanium (Ti) 0 to 0.2
Zinc (Zn) 0 to 0.1
Copper (Cu) 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

CRC Materials Science and Engineering Handbook, 4th ed., James F. Shackelford et al. (editors), 2015