520.0 (520.0-T4, formerly 220.0, LM10, G10A, A05200) Cast Aluminum
520.0 aluminum is an aluminum alloy formulated for casting. Cited properties are appropriate for the T4 temper. To achieve this temper, the metal is solution heat-treated and naturally aged. 520.0 is the Aluminum Association (AA) designation for this material. LM10 is the British Standard (BS) designation. A05200 is the UNS number. Additionally, the SAE designation is 324. Older literature may refer to this material as ASTM G10A, but this is now discouraged.
It has the lowest thermal conductivity among the ANSI/AA cast aluminums in the database.
The graph bars on the material properties cards below compare 520.0 aluminum to: ANSI/AA 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
75
Elastic (Young's, Tensile) Modulus
66 GPa 9.6 x 106 psi
Elongation at Break
14 %
Fatigue Strength
55 MPa 8.0 x 103 psi
Poisson's Ratio
0.33
Shear Modulus
25 GPa 3.6 x 106 psi
Shear Strength
230 MPa 34 x 103 psi
Tensile Strength: Ultimate (UTS)
330 MPa 48 x 103 psi
Tensile Strength: Yield (Proof)
170 MPa 25 x 103 psi
Thermal Properties
Latent Heat of Fusion
390 J/g
Maximum Temperature: Mechanical
170 °C 340 °F
Melting Completion (Liquidus)
600 °C 1110 °F
Melting Onset (Solidus)
480 °C 890 °F
Solidification (Pattern Maker's) Shrinkage
0.8 %
Specific Heat Capacity
910 J/kg-K 0.22 BTU/lb-°F
Thermal Conductivity
87 W/m-K 51 BTU/h-ft-°F
Thermal Expansion
25 µm/m-K
Electrical Properties
Electrical Conductivity: Equal Volume
21 % IACS
Electrical Conductivity: Equal Weight (Specific)
72 % IACS
Otherwise Unclassified Properties
Base Metal Price
9.5 % relative
Density
2.6 g/cm3 160 lb/ft3
Embodied Carbon
9.8 kg CO2/kg material
Embodied Energy
160 MJ/kg 67 x 103 BTU/lb
Embodied Water
1170 L/kg 140 gal/lb
Common Calculations
Resilience: Ultimate (Unit Rupture Work)
39 MJ/m3
Resilience: Unit (Modulus of Resilience)
230 kJ/m3
Stiffness to Weight: Axial
14 points
Stiffness to Weight: Bending
52 points
Strength to Weight: Axial
35 points
Strength to Weight: Bending
41 points
Thermal Diffusivity
37 mm2/s
Thermal Shock Resistance
14 points
Alloy Composition
Among cast aluminum alloys, the composition of 520.0 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 | 87.9 to 90.5 | |
| Mg | 9.5 to 10.6 | |
| Fe | 0 to 0.3 | |
| Si | 0 to 0.25 | |
| Ti | 0 to 0.25 | |
| Cu | 0 to 0.25 | |
| Mn | 0 to 0.15 | |
| Zn | 0 to 0.15 | |
| res. | 0 to 0.15 |
All values are % weight. Ranges represent what is permitted under applicable standards.
Followup Questions
Similar Alloys
Further Reading
ASTM B618: Standard Specification for Aluminum-Alloy Investment Castings
ASTM B26: Standard Specification for Aluminum-Alloy Sand Castings
Properties and Selection: Nonferrous Alloys and Special-Purpose Materials, ASM Handbook vol. 2, ASM International, 1993