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.
| Al | 91.5 to 93.6 | |
| Mg | 6.2 to 7.5 | |
| Mn | 0.1 to 0.25 | |
| Ti | 0.1 to 0.25 | |
| Si | 0 to 0.15 | |
| Fe | 0 to 0.15 | |
| Cu | 0 to 0.050 | |
| Be | 0.0030 to 0.0070 | |
| B | 0 to 0.0050 | |
| 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 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