328.0-T6 Cast Aluminum
328.0-T6 aluminum is 328.0 aluminum in the T6 temper. To achieve this temper, the metal is solution heat-treated and artificially aged until it meets standard mechanical property requirements. The graph bars on the material properties cards below compare 328.0-T6 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
82
Elastic (Young's, Tensile) Modulus
72 GPa 10 x 106 psi
Elongation at Break
2.1 %
Fatigue Strength
55 MPa 8.0 x 103 psi
Poisson's Ratio
0.33
Shear Modulus
27 GPa 3.9 x 106 psi
Shear Strength
190 MPa 28 x 103 psi
Tensile Strength: Ultimate (UTS)
270 MPa 40 x 103 psi
Tensile Strength: Yield (Proof)
170 MPa 25 x 103 psi
Thermal Properties
Latent Heat of Fusion
510 J/g
Maximum Temperature: Mechanical
180 °C 350 °F
Melting Completion (Liquidus)
620 °C 1140 °F
Melting Onset (Solidus)
560 °C 1050 °F
Solidification (Pattern Maker's) Shrinkage
1.3 %
Specific Heat Capacity
890 J/kg-K 0.21 BTU/lb-°F
Thermal Conductivity
120 W/m-K 70 BTU/h-ft-°F
Thermal Expansion
22 µm/m-K
Electrical Properties
Electrical Conductivity: Equal Volume
30 % IACS
Electrical Conductivity: Equal Weight (Specific)
99 % IACS
Otherwise Unclassified Properties
Base Metal Price
10 % relative
Density
2.7 g/cm3 170 lb/ft3
Embodied Carbon
7.8 kg CO2/kg material
Embodied Energy
140 MJ/kg 62 x 103 BTU/lb
Embodied Water
1070 L/kg 130 gal/lb
Common Calculations
Resilience: Ultimate (Unit Rupture Work)
5.0 MJ/m3
Resilience: Unit (Modulus of Resilience)
200 kJ/m3
Stiffness to Weight: Axial
15 points
Stiffness to Weight: Bending
51 points
Strength to Weight: Axial
28 points
Strength to Weight: Bending
34 points
Thermal Diffusivity
50 mm2/s
Thermal Shock Resistance
12 points
Alloy Composition
| Al | 84.5 to 91.1 | |
| Si | 7.5 to 8.5 | |
| Cu | 1.0 to 2.0 | |
| Zn | 0 to 1.5 | |
| Fe | 0 to 1.0 | |
| Mn | 0.2 to 0.6 | |
| Mg | 0.2 to 0.6 | |
| Cr | 0 to 0.35 | |
| Ni | 0 to 0.25 | |
| Ti | 0 to 0.25 | |
| res. | 0 to 0.5 |
All values are % weight. Ranges represent what is permitted under applicable standards.
Followup Questions
Further Reading
ASTM B618: Standard Specification for Aluminum-Alloy Investment Castings
ASTM B26: Standard Specification for Aluminum-Alloy Sand Castings
Iron in Aluminium Alloys: Impurity and Alloying Element, N. A. Belov et al., 2002
Handbook of Aluminum Bonding Technology and Data, J. D. Minford, 1993