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EN AC-51500 (51500-F, AIMg5Si2Mn) Cast Aluminum

EN AC-51500 aluminum is an aluminum alloy formulated for casting. Cited properties are appropriate for the as-fabricated (no temper or treatment) condition. 51500 is the EN numeric designation for this material. AIMg5Si2Mn is the EN chemical designation.

It has a fairly low electrical conductivity among Euronorm (EN) cast aluminums. In addition, it has a moderately low thermal conductivity and a fairly high ductility.

The graph bars on the material properties cards below compare EN AC-51500 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

80

Elastic (Young's, Tensile) Modulus

68 GPa 9.9 x 106 psi

Elongation at Break

5.6 %

Fatigue Strength

120 MPa 17 x 103 psi

Poisson's Ratio

0.33

Shear Modulus

26 GPa 3.7 x 106 psi

Tensile Strength: Ultimate (UTS)

280 MPa 41 x 103 psi

Tensile Strength: Yield (Proof)

160 MPa 23 x 103 psi

Thermal Properties

Latent Heat of Fusion

430 J/g

Maximum Temperature: Mechanical

170 °C 340 °F

Melting Completion (Liquidus)

630 °C 1170 °F

Melting Onset (Solidus)

590 °C 1100 °F

Specific Heat Capacity

910 J/kg-K 0.22 BTU/lb-°F

Thermal Conductivity

120 W/m-K 67 BTU/h-ft-°F

Thermal Expansion

23 µm/m-K

Electrical Properties

Electrical Conductivity: Equal Volume

26 % IACS

Electrical Conductivity: Equal Weight (Specific)

88 % IACS

Otherwise Unclassified Properties

Base Metal Price

9.5 % relative

Density

2.6 g/cm3 160 lb/ft3

Embodied Carbon

9.0 kg CO2/kg material

Embodied Energy

150 MJ/kg 66 x 103 BTU/lb

Embodied Water

1150 L/kg 140 gal/lb

Common Calculations

Resilience: Ultimate (Unit Rupture Work)

13 MJ/m3

Resilience: Unit (Modulus of Resilience)

190 kJ/m3

Stiffness to Weight: Axial

14 points

Stiffness to Weight: Bending

52 points

Strength to Weight: Axial

29 points

Strength to Weight: Bending

36 points

Thermal Diffusivity

49 mm2/s

Thermal Shock Resistance

13 points

Alloy Composition

Among cast aluminum alloys, the composition of EN AC-51500 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) 89.8 to 93.1
Magnesium (Mg) 4.7 to 6.0
Silicon (Si) 1.8 to 2.6
Manganese (Mn) 0.4 to 0.8
Iron (Fe) 0 to 0.25
Titanium (Ti) 0 to 0.25
Zinc (Zn) 0 to 0.070
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

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