EN AC-71100 (71100-T1, AIZn10Si8Mg) Cast Aluminum
EN AC-71100 aluminum is an aluminum alloy formulated for casting. Cited properties are appropriate for the T1 temper. To achieve this temper, the metal is naturally aged until it meets standard mechanical property requirements. 71100 is the EN numeric designation for this material. AIZn10Si8Mg is the EN chemical designation.
It has a fairly low melting temperature and a moderately high density among Euronorm (EN) cast aluminums.
The graph bars on the material properties cards below compare EN AC-71100 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
110
Elastic (Young's, Tensile) Modulus
72 GPa 10 x 106 psi
Elongation at Break
1.1 %
Fatigue Strength
150 MPa 22 x 103 psi
Poisson's Ratio
0.32
Shear Modulus
27 GPa 4.0 x 106 psi
Tensile Strength: Ultimate (UTS)
260 MPa 38 x 103 psi
Tensile Strength: Yield (Proof)
230 MPa 33 x 103 psi
Thermal Properties
Latent Heat of Fusion
490 J/g
Maximum Temperature: Mechanical
170 °C 340 °F
Melting Completion (Liquidus)
580 °C 1070 °F
Melting Onset (Solidus)
520 °C 960 °F
Specific Heat Capacity
860 J/kg-K 0.2 BTU/lb-°F
Thermal Expansion
22 µm/m-K
Electrical Properties
Electrical Conductivity: Equal Volume
32 % IACS
Electrical Conductivity: Equal Weight (Specific)
97 % IACS
Otherwise Unclassified Properties
Base Metal Price
9.5 % relative
Density
2.9 g/cm3 180 lb/ft3
Embodied Carbon
7.4 kg CO2/kg material
Embodied Energy
140 MJ/kg 59 x 103 BTU/lb
Embodied Water
1010 L/kg 120 gal/lb
Common Calculations
Resilience: Ultimate (Unit Rupture Work)
2.8 MJ/m3
Resilience: Unit (Modulus of Resilience)
360 kJ/m3
Stiffness to Weight: Axial
14 points
Stiffness to Weight: Bending
47 points
Strength to Weight: Axial
25 points
Strength to Weight: Bending
31 points
Thermal Shock Resistance
12 points
Alloy Composition
Among cast aluminum alloys, the composition of EN AC-71100 aluminum is notable for containing a comparatively high amount of zinc (Zn). Zinc is used to achieve significant increases in strength, at the cost of increased susceptibility to stress corrosion cracking. Among other things, this limits weldability.
| Al | 78.7 to 83.3 | |
| Zn | 9.0 to 10.5 | |
| Si | 7.5 to 9.5 | |
| Mg | 0.2 to 0.5 | |
| Fe | 0 to 0.3 | |
| Mn | 0 to 0.15 | |
| Ti | 0 to 0.15 | |
| Cu | 0 to 0.1 | |
| res. | 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
Handbook of Aluminum vol. 2: Alloy Production and Materials Manufacturing, George Totten and D. Scott MacKenzie (editors), 2003