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
| Al | 93.3 to 95.7 | |
| Cu | 4.0 to 5.0 | |
| Mn | 0.2 to 0.5 | |
| Mg | 0.15 to 0.5 | |
| Fe | 0 to 0.2 | |
| Si | 0 to 0.1 | |
| Ti | 0 to 0.1 | |
| Zn | 0 to 0.1 | |
| Ni | 0 to 0.050 | |
| Sn | 0 to 0.030 | |
| Pb | 0 to 0.030 | |
| res. | 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