C355.0-T61 Cast Aluminum
C355.0-T61 aluminum is C355.0 aluminum in the T61 temper. To achieve this temper, the metal is solution heat-treated and artificially underaged. The degree of underaging is different from T64 and T65.
The graph bars on the material properties cards below compare C355.0-T61 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
86
Elastic (Young's, Tensile) Modulus
70 GPa 10 x 106 psi
Elongation at Break
2.7 %
Fatigue Strength
76 MPa 11 x 103 psi
Poisson's Ratio
0.33
Shear Modulus
26 GPa 3.8 x 106 psi
Tensile Strength: Ultimate (UTS)
310 MPa 44 x 103 psi
Tensile Strength: Yield (Proof)
230 MPa 34 x 103 psi
Thermal Properties
Latent Heat of Fusion
470 J/g
Maximum Temperature: Mechanical
170 °C 340 °F
Melting Completion (Liquidus)
620 °C 1150 °F
Melting Onset (Solidus)
570 °C 1050 °F
Solidification (Pattern Maker's) Shrinkage
1.3 %
Specific Heat Capacity
900 J/kg-K 0.21 BTU/lb-°F
Thermal Conductivity
150 W/m-K 84 BTU/h-ft-°F
Thermal Expansion
22 µm/m-K
Electrical Properties
Electrical Conductivity: Equal Volume
39 % IACS
Electrical Conductivity: Equal Weight (Specific)
130 % IACS
Otherwise Unclassified Properties
Base Metal Price
9.5 % relative
Density
2.7 g/cm3 170 lb/ft3
Embodied Carbon
8.0 kg CO2/kg material
Embodied Energy
150 MJ/kg 64 x 103 BTU/lb
Embodied Water
1120 L/kg 130 gal/lb
Common Calculations
Resilience: Ultimate (Unit Rupture Work)
7.5 MJ/m3
Resilience: Unit (Modulus of Resilience)
380 kJ/m3
Stiffness to Weight: Axial
14 points
Stiffness to Weight: Bending
51 points
Strength to Weight: Axial
32 points
Strength to Weight: Bending
37 points
Thermal Diffusivity
60 mm2/s
Thermal Shock Resistance
14 points
Alloy Composition
| Al | 91.7 to 94.1 | |
| Si | 4.5 to 5.5 | |
| Cu | 1.0 to 1.5 | |
| Mg | 0.4 to 0.6 | |
| Fe | 0 to 0.2 | |
| Ti | 0 to 0.2 | |
| Mn | 0 to 0.1 | |
| Zn | 0 to 0.1 | |
| res. | 0 to 0.15 |
All values are % weight. Ranges represent what is permitted under applicable standards.
Followup Questions
Further Reading
ASTM B686: Standard Specification for Aluminum Alloy Castings, High-Strength
ASTM B108: Standard Specification for Aluminum-Alloy Permanent Mold Castings
ASTM B26: Standard Specification for Aluminum-Alloy Sand Castings
Aluminum: Properties and Physical Metallurgy, John E. Hatch (editor), 1984
ASM Specialty Handbook: Aluminum and Aluminum Alloys, J. R. Davis (editor), 1993