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EN AC-51200 (52100-F, AIMg9) Cast Aluminum

EN AC-51200 aluminum is an aluminum alloy formulated for casting. Cited properties are appropriate for the as-fabricated (no temper or treatment) condition. 51200 is the EN numeric designation for this material. AIMg9 is the EN chemical designation.

It has the lowest electrical conductivity among Euronorm (EN) cast aluminums. In addition, it has the lowest thermal conductivity and a moderately low tensile strength.

The graph bars on the material properties cards below compare EN AC-51200 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

67 GPa 9.7 x 106 psi

Elongation at Break

1.1 %

Fatigue Strength

100 MPa 15 x 103 psi

Poisson's Ratio

0.33

Shear Modulus

25 GPa 3.7 x 106 psi

Tensile Strength: Ultimate (UTS)

220 MPa 32 x 103 psi

Tensile Strength: Yield (Proof)

150 MPa 21 x 103 psi

Thermal Properties

Latent Heat of Fusion

410 J/g

Maximum Temperature: Mechanical

170 °C 340 °F

Melting Completion (Liquidus)

640 °C 1180 °F

Melting Onset (Solidus)

570 °C 1060 °F

Specific Heat Capacity

910 J/kg-K 0.22 BTU/lb-°F

Thermal Conductivity

92 W/m-K 53 BTU/h-ft-°F

Thermal Expansion

23 µm/m-K

Electrical Properties

Electrical Conductivity: Equal Volume

22 % IACS

Electrical Conductivity: Equal Weight (Specific)

74 % IACS

Otherwise Unclassified Properties

Base Metal Price

9.5 % relative

Density

2.6 g/cm3 160 lb/ft3

Embodied Carbon

9.6 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)

2.2 MJ/m3

Resilience: Unit (Modulus of Resilience)

160 kJ/m3

Stiffness to Weight: Axial

14 points

Stiffness to Weight: Bending

51 points

Strength to Weight: Axial

24 points

Strength to Weight: Bending

31 points

Thermal Diffusivity

39 mm2/s

Thermal Shock Resistance

10 points

Alloy Composition

Among cast aluminum alloys, the composition of EN AC-51200 aluminum is notable for containing a comparatively high amount of magnesium (Mg) and including lead (Pb). Magnesium promotes hardenability through both heat treatment and strain hardening mechanisms. It also increases susceptibility to intergranular corrosion. Lead is used to improve machinability at the cost of toxicity and a decrease in weldability.

Aluminum (Al) 84.5 to 92
Magnesium (Mg) 8.0 to 10.5
Silicon (Si) 0 to 2.5
Iron (Fe) 0 to 1.0
Manganese (Mn) 0 to 0.55
Zinc (Zn) 0 to 0.25
Titanium (Ti) 0 to 0.2
Nickel (Ni) 0 to 0.1
Tin (Sn) 0 to 0.1
Lead (Pb) 0 to 0.1
Copper (Cu) 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

Iron in Aluminium Alloys: Impurity and Alloying Element, N. A. Belov et al., 2002