707.0-T1 Cast Aluminum
707.0-T1 aluminum is 707.0 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 707.0-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
85
Elastic (Young's, Tensile) Modulus
70 GPa 10 x 106 psi
Elongation at Break
3.4 %
Fatigue Strength
130 MPa 18 x 103 psi
Poisson's Ratio
0.33
Shear Modulus
26 GPa 3.8 x 106 psi
Tensile Strength: Ultimate (UTS)
290 MPa 42 x 103 psi
Tensile Strength: Yield (Proof)
190 MPa 27 x 103 psi
Thermal Properties
Latent Heat of Fusion
380 J/g
Maximum Temperature: Mechanical
180 °C 360 °F
Melting Completion (Liquidus)
630 °C 1170 °F
Melting Onset (Solidus)
600 °C 1110 °F
Solidification (Pattern Maker's) Shrinkage
1.6 %
Specific Heat Capacity
880 J/kg-K 0.21 BTU/lb-°F
Thermal Conductivity
150 W/m-K 85 BTU/h-ft-°F
Thermal Expansion
24 µm/m-K
Electrical Properties
Electrical Conductivity: Equal Volume
37 % IACS
Electrical Conductivity: Equal Weight (Specific)
110 % IACS
Otherwise Unclassified Properties
Base Metal Price
9.5 % relative
Density
2.9 g/cm3 180 lb/ft3
Embodied Carbon
8.3 kg CO2/kg material
Embodied Energy
150 MJ/kg 64 x 103 BTU/lb
Embodied Water
1140 L/kg 140 gal/lb
Common Calculations
Resilience: Ultimate (Unit Rupture Work)
8.6 MJ/m3
Resilience: Unit (Modulus of Resilience)
250 kJ/m3
Stiffness to Weight: Axial
13 points
Stiffness to Weight: Bending
47 points
Strength to Weight: Axial
28 points
Strength to Weight: Bending
34 points
Thermal Diffusivity
58 mm2/s
Thermal Shock Resistance
12 points
Alloy Composition
| Al | 90.5 to 93.6 | |
| Zn | 4.0 to 4.5 | |
| Mg | 1.8 to 2.4 | |
| Mn | 0.4 to 0.6 | |
| Fe | 0 to 0.8 | |
| Cr | 0.2 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
Properties and Selection: Nonferrous Alloys and Special-Purpose Materials, ASM Handbook vol. 2, ASM International, 1993
CRC Materials Science and Engineering Handbook, 4th ed., James F. Shackelford et al. (editors), 2015