705.0-T1 Cast Aluminum
705.0-T1 aluminum is 705.0 aluminum in the T1 temper. To achieve this temper, the metal is naturally aged until it meets standard mechanical property requirements. The graph bars on the material properties cards below compare 705.0-T1 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
65
Elastic (Young's, Tensile) Modulus
69 GPa 10 x 106 psi
Elongation at Break
8.4 %
Fatigue Strength
98 MPa 14 x 103 psi
Poisson's Ratio
0.33
Shear Modulus
26 GPa 3.8 x 106 psi
Tensile Strength: Ultimate (UTS)
260 MPa 38 x 103 psi
Tensile Strength: Yield (Proof)
130 MPa 19 x 103 psi
Thermal Properties
Latent Heat of Fusion
390 J/g
Maximum Temperature: Mechanical
180 °C 350 °F
Melting Completion (Liquidus)
640 °C 1180 °F
Melting Onset (Solidus)
610 °C 1130 °F
Solidification (Pattern Maker's) Shrinkage
1.6 %
Specific Heat Capacity
890 J/kg-K 0.21 BTU/lb-°F
Thermal Conductivity
140 W/m-K 79 BTU/h-ft-°F
Thermal Expansion
24 µm/m-K
Electrical Properties
Electrical Conductivity: Equal Volume
34 % IACS
Electrical Conductivity: Equal Weight (Specific)
110 % IACS
Otherwise Unclassified Properties
Base Metal Price
9.5 % relative
Density
2.8 g/cm3 170 lb/ft3
Embodied Carbon
8.4 kg CO2/kg material
Embodied Energy
150 MJ/kg 66 x 103 BTU/lb
Embodied Water
1170 L/kg 140 gal/lb
Common Calculations
Resilience: Ultimate (Unit Rupture Work)
18 MJ/m3
Resilience: Unit (Modulus of Resilience)
130 kJ/m3
Stiffness to Weight: Axial
14 points
Stiffness to Weight: Bending
49 points
Strength to Weight: Axial
26 points
Strength to Weight: Bending
32 points
Thermal Diffusivity
55 mm2/s
Thermal Shock Resistance
11 points
Alloy Composition
| Al | 92.3 to 98.6 | |
| Zn | 0 to 3.3 | |
| Mg | 1.4 to 1.8 | |
| Fe | 0 to 0.8 | |
| Mn | 0 to 0.6 | |
| Cr | 0 to 0.4 | |
| Ti | 0 to 0.25 | |
| Si | 0 to 0.2 | |
| Cu | 0 to 0.2 | |
| 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
Aluminum: Properties and Physical Metallurgy, John E. Hatch (editor), 1984
ASM Specialty Handbook: Aluminum and Aluminum Alloys, J. R. Davis (editor), 1993