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EN AC-21200-T7 Cast Aluminum

EN AC-21200-T7 is EN AC-21200 aluminum in the T7 temper. To achieve this temper, the metal is solution heat-treated and stabilized by artificial overaging. The graph bars on the material properties cards below compare EN AC-21200-T7 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

130

Elastic (Young's, Tensile) Modulus

71 GPa 10 x 106 psi

Elongation at Break

3.9 %

Fatigue Strength

130 MPa 19 x 103 psi

Poisson's Ratio

0.33

Shear Modulus

27 GPa 3.9 x 106 psi

Tensile Strength: Ultimate (UTS)

440 MPa 63 x 103 psi

Tensile Strength: Yield (Proof)

360 MPa 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 MJ/m3

Resilience: Unit (Modulus of Resilience)

930 kJ/m3

Stiffness to Weight: Axial

13 points

Stiffness to Weight: Bending

46 points

Strength to Weight: Axial

40 points

Strength to Weight: Bending

43 points

Thermal Diffusivity

49 mm2/s

Thermal Shock Resistance

19 points

Alloy Composition

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

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