EN AC-51100 (51100-F, AIMg3) Cast Aluminum
EN AC-51100 aluminum is an aluminum alloy formulated for casting. Cited properties are appropriate for the as-fabricated (no temper or treatment) condition. 51100 is the EN numeric designation for this material. AIMg3 is the EN chemical designation.
It has the lowest tensile strength among Euronorm (EN) cast aluminums. In addition, it has a very high melting temperature and a moderately high ductility.
The graph bars on the material properties cards below compare EN AC-51100 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
57
Elastic (Young's, Tensile) Modulus
68 GPa 9.9 x 106 psi
Elongation at Break
4.5 %
Fatigue Strength
58 MPa 8.4 x 103 psi
Poisson's Ratio
0.33
Shear Modulus
26 GPa 3.7 x 106 psi
Tensile Strength: Ultimate (UTS)
160 MPa 24 x 103 psi
Tensile Strength: Yield (Proof)
80 MPa 12 x 103 psi
Thermal Properties
Latent Heat of Fusion
400 J/g
Maximum Temperature: Mechanical
170 °C 340 °F
Melting Completion (Liquidus)
640 °C 1190 °F
Melting Onset (Solidus)
620 °C 1150 °F
Specific Heat Capacity
900 J/kg-K 0.22 BTU/lb-°F
Thermal Conductivity
130 W/m-K 75 BTU/h-ft-°F
Thermal Expansion
23 µm/m-K
Electrical Properties
Electrical Conductivity: Equal Volume
34 % IACS
Electrical Conductivity: Equal Weight (Specific)
110 % IACS
Otherwise Unclassified Properties
Base Metal Price
9.5 % relative
Density
2.7 g/cm3 170 lb/ft3
Embodied Carbon
8.7 kg CO2/kg material
Embodied Energy
150 MJ/kg 66 x 103 BTU/lb
Embodied Water
1180 L/kg 140 gal/lb
Common Calculations
Resilience: Ultimate (Unit Rupture Work)
6.0 MJ/m3
Resilience: Unit (Modulus of Resilience)
47 kJ/m3
Stiffness to Weight: Axial
14 points
Stiffness to Weight: Bending
51 points
Strength to Weight: Axial
17 points
Strength to Weight: Bending
25 points
Thermal Diffusivity
53 mm2/s
Thermal Shock Resistance
7.3 points
Alloy Composition
Among cast aluminum alloys, the composition of EN AC-51100 aluminum is notable for containing a comparatively high amount of magnesium (Mg). Magnesium promotes hardenability through both heat treatment and strain hardening mechanisms. It also increases susceptibility to intergranular corrosion.
| Al | 94.5 to 97.5 | |
| Mg | 2.5 to 3.5 | |
| Si | 0 to 0.55 | |
| Fe | 0 to 0.55 | |
| Mn | 0 to 0.45 | |
| Ti | 0 to 0.2 | |
| Zn | 0 to 0.1 | |
| Cu | 0 to 0.050 | |
| 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
Aluminum: Properties and Physical Metallurgy, John E. Hatch (editor), 1984
CRC Materials Science and Engineering Handbook, 4th ed., James F. Shackelford et al. (editors), 2015