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EN AC-21200 (AICu4MnMg) Cast Aluminum

EN AC-21200 aluminum is an aluminum alloy formulated for casting. 21200 is the EN numeric designation for this material. AICu4MnMg is the EN chemical designation.

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

The properties of EN AC-21200 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-21200 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

120 to 130

Elastic (Young's, Tensile) Modulus

71 GPa 10 x 106 psi

Elongation at Break

3.9 to 6.2 %

Fatigue Strength

110 to 130 MPa 17 to 19 x 103 psi

Poisson's Ratio

0.33

Shear Modulus

27 GPa 3.9 x 106 psi

Tensile Strength: Ultimate (UTS)

410 to 440 MPa 59 to 63 x 103 psi

Tensile Strength: Yield (Proof)

270 to 360 MPa 38 to 52 x 103 psi

Thermal Properties

Latent Heat of Fusion

390 J/g

Maximum Temperature: Mechanical

170 °C 340 °F

Melting Completion (Liquidus)

660 °C 1230 °F

Melting Onset (Solidus)

550 °C 1020 °F

Specific Heat Capacity

880 J/kg-K 0.21 BTU/lb-°F

Thermal Conductivity

130 W/m-K 74 BTU/h-ft-°F

Thermal Expansion

23 µm/m-K

Electrical Properties

Electrical Conductivity: Equal Volume

34 % IACS

Electrical Conductivity: Equal Weight (Specific)

100 % IACS

Otherwise Unclassified Properties

Base Metal Price

10 % relative

Density

3.0 g/cm3 190 lb/ft3

Embodied Carbon

8.0 kg CO2/kg material

Embodied Energy

150 MJ/kg 64 x 103 BTU/lb

Embodied Water

1150 L/kg 140 gal/lb

Common Calculations

Resilience: Ultimate (Unit Rupture Work)

16 to 22 MJ/m3

Resilience: Unit (Modulus of Resilience)

500 to 930 kJ/m3

Stiffness to Weight: Axial

13 points

Stiffness to Weight: Bending

46 points

Strength to Weight: Axial

38 to 40 points

Strength to Weight: Bending

41 to 43 points

Thermal Diffusivity

49 mm2/s

Thermal Shock Resistance

18 to 19 points

Alloy Composition

Among cast aluminum alloys, the composition of EN AC-21200 aluminum is notable for containing a comparatively high amount of copper (Cu) and including lead (Pb). Copper is used to improve strength. This comes at the cost of a decrease in corrosion resistance and weldability. Lead is used to improve machinability at the cost of toxicity and a decrease in weldability.

Aluminum (Al) 93.3 to 95.7
Copper (Cu) 4.0 to 5.0
Manganese (Mn) 0.2 to 0.5
Magnesium (Mg) 0.15 to 0.5
Iron (Fe) 0 to 0.2
Silicon (Si) 0 to 0.1
Titanium (Ti) 0 to 0.1
Zinc (Zn) 0 to 0.1
Nickel (Ni) 0 to 0.050
Tin (Sn) 0 to 0.030
Lead (Pb) 0 to 0.030
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