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535.0 (535.0-F, GM70B, A05350) Cast Aluminum

535.0 aluminum is an aluminum alloy formulated for casting. Cited properties are appropriate for the as-fabricated (no temper or treatment) condition. 535.0 is the Aluminum Association (AA) designation for this material. A05350 is the UNS number. Older literature may refer to this material as ASTM GM70B, but this is now discouraged.

The graph bars on the material properties cards below compare 535.0 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

70

Elastic (Young's, Tensile) Modulus

67 GPa 9.7 x 106 psi

Elongation at Break

10 %

Fatigue Strength

70 MPa 10 x 103 psi

Poisson's Ratio

0.33

Shear Modulus

25 GPa 3.6 x 106 psi

Shear Strength

190 MPa 28 x 103 psi

Tensile Strength: Ultimate (UTS)

270 MPa 39 x 103 psi

Tensile Strength: Yield (Proof)

140 MPa 21 x 103 psi

Thermal Properties

Latent Heat of Fusion

390 J/g

Maximum Temperature: Mechanical

170 °C 340 °F

Melting Completion (Liquidus)

630 °C 1170 °F

Melting Onset (Solidus)

570 °C 1060 °F

Solidification (Pattern Maker's) Shrinkage

1.3 %

Specific Heat Capacity

910 J/kg-K 0.22 BTU/lb-°F

Thermal Conductivity

100 W/m-K 58 BTU/h-ft-°F

Thermal Expansion

24 µm/m-K

Electrical Properties

Electrical Conductivity: Equal Volume

23 % IACS

Electrical Conductivity: Equal Weight (Specific)

79 % IACS

Otherwise Unclassified Properties

Base Metal Price

9.5 % relative

Density

2.6 g/cm3 160 lb/ft3

Embodied Carbon

9.4 kg CO2/kg material

Embodied Energy

160 MJ/kg 67 x 103 BTU/lb

Embodied Water

1180 L/kg 140 gal/lb

Common Calculations

Resilience: Ultimate (Unit Rupture Work)

24 MJ/m3

Resilience: Unit (Modulus of Resilience)

150 kJ/m3

Stiffness to Weight: Axial

14 points

Stiffness to Weight: Bending

51 points

Strength to Weight: Axial

28 points

Strength to Weight: Bending

35 points

Thermal Diffusivity

42 mm2/s

Thermal Shock Resistance

12 points

Alloy Composition

Among cast aluminum alloys, the composition of 535.0 aluminum is notable for including boron (B) and beryllium (Be). Boron is used as a grain refiner, and to improve electrical conductivity. Beryllium is used to reduce oxidation at elevated temperatures, at the cost of substantial toxicity.

Aluminum (Al) 91.5 to 93.6
Magnesium (Mg) 6.2 to 7.5
Manganese (Mn) 0.1 to 0.25
Titanium (Ti) 0.1 to 0.25
Silicon (Si) 0 to 0.15
Iron (Fe) 0 to 0.15
Copper (Cu) 0 to 0.050
Beryllium (Be) 0.0030 to 0.0070
Boron (B) 0 to 0.0050
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 B108: Standard Specification for Aluminum-Alloy Permanent Mold Castings

ASTM B26: Standard Specification for Aluminum-Alloy Sand Castings

Handbook of Aluminum Bonding Technology and Data, J. D. Minford, 1993

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