355.0-T51 Cast Aluminum
355.0-T51 aluminum is 355.0 aluminum in the T51 temper. To achieve this temper, the metal is artificially underaged. The degree of underaging is different from T53 and T54. It has the lowest strength compared to the other variants of 355.0 aluminum.
The graph bars on the material properties cards below compare 355.0-T51 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
72
Elastic (Young's, Tensile) Modulus
71 GPa 10 x 106 psi
Elongation at Break
1.5 %
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
150 MPa 22 x 103 psi
Tensile Strength: Ultimate (UTS)
200 MPa 29 x 103 psi
Tensile Strength: Yield (Proof)
150 MPa 21 x 103 psi
Thermal Properties
Latent Heat of Fusion
470 J/g
Maximum Temperature: Mechanical
180 °C 350 °F
Melting Completion (Liquidus)
620 °C 1150 °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
170 W/m-K 97 BTU/h-ft-°F
Thermal Expansion
22 µm/m-K
Electrical Properties
Electrical Conductivity: Equal Volume
43 % IACS
Electrical Conductivity: Equal Weight (Specific)
140 % 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)
2.7 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
20 points
Strength to Weight: Bending
28 points
Thermal Diffusivity
69 mm2/s
Thermal Shock Resistance
9.1 points
Alloy Composition
| Al | 90.3 to 94.1 | |
| Si | 4.5 to 5.5 | |
| Cu | 1.0 to 1.5 | |
| Mg | 0.4 to 0.6 | |
| Fe | 0 to 0.6 | |
| Mn | 0 to 0.5 | |
| Zn | 0 to 0.35 | |
| Cr | 0 to 0.25 | |
| Ti | 0 to 0.25 | |
| res. | 0 to 0.15 |
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 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
ASM Specialty Handbook: Aluminum and Aluminum Alloys, J. R. Davis (editor), 1993