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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.

Aluminum (Al) 87.9 to 90.5
Magnesium (Mg) 9.5 to 10.6
Iron (Fe) 0 to 0.3
Silicon (Si) 0 to 0.25
Titanium (Ti) 0 to 0.25
Copper (Cu) 0 to 0.25
Manganese (Mn) 0 to 0.15
Zinc (Zn) 0 to 0.15
Residuals 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