713.0 (ZC81A, A07130) Cast Aluminum
713.0 aluminum is an aluminum alloy formulated for casting. 713.0 is the Aluminum Association (AA) designation for this material. A07130 is the UNS number. Additionally, the SAE designation is 315. Older literature may refer to this material as ASTM ZC81A, but this is now discouraged.
The properties of 713.0 aluminum include three common variations. This page shows summary ranges across all of them. For more specific values, follow the links immediately below. The graph bars on the material properties cards further below compare 713.0 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
74 to 75
Elastic (Young's, Tensile) Modulus
71 GPa 10 x 106 psi
Elongation at Break
3.9 to 4.3 %
Fatigue Strength
63 to 120 MPa 9.1 to 17 x 103 psi
Poisson's Ratio
0.32
Shear Modulus
27 GPa 3.9 x 106 psi
Shear Strength
180 MPa 26 x 103 psi
Tensile Strength: Ultimate (UTS)
240 to 260 MPa 35 to 37 x 103 psi
Tensile Strength: Yield (Proof)
170 MPa 25 x 103 psi
Thermal Properties
Latent Heat of Fusion
370 J/g
Maximum Temperature: Mechanical
180 °C 350 °F
Melting Completion (Liquidus)
630 °C 1170 °F
Melting Onset (Solidus)
610 °C 1130 °F
Solidification (Pattern Maker's) Shrinkage
1.6 %
Specific Heat Capacity
860 J/kg-K 0.2 BTU/lb-°F
Thermal Conductivity
150 W/m-K 86 BTU/h-ft-°F
Thermal Expansion
24 µm/m-K
Electrical Properties
Electrical Conductivity: Equal Volume
35 % IACS
Electrical Conductivity: Equal Weight (Specific)
100 % IACS
Otherwise Unclassified Properties
Base Metal Price
9.5 % relative
Density
3.1 g/cm3 190 lb/ft3
Embodied Carbon
7.8 kg CO2/kg material
Embodied Energy
150 MJ/kg 63 x 103 BTU/lb
Embodied Water
1110 L/kg 130 gal/lb
Common Calculations
Resilience: Ultimate (Unit Rupture Work)
8.7 to 9.9 MJ/m3
Resilience: Unit (Modulus of Resilience)
210 to 220 kJ/m3
Stiffness to Weight: Axial
13 points
Stiffness to Weight: Bending
45 points
Strength to Weight: Axial
22 to 23 points
Strength to Weight: Bending
28 to 29 points
Thermal Diffusivity
57 mm2/s
Thermal Shock Resistance
10 to 11 points
Alloy Composition
Among cast aluminum alloys, the composition of 713.0 aluminum is notable for containing a comparatively high amount of zinc (Zn) and including chromium (Cr). Zinc is used to achieve significant increases in strength, at the cost of increased susceptibility to stress corrosion cracking. Among other things, this limits weldability. Chromium is used to limit grain growth during hot working or heat treatment, which improves ductility and toughness. Chromium also reduces the alloy's susceptibility to stress corrosion cracking. If the alloy is anodized, the presence of chromium will tend to add a yellow tint to the film.
| Al | 87.6 to 92.4 | |
| Zn | 7.0 to 8.0 | |
| Cu | 0.4 to 1.0 | |
| Fe | 0 to 1.1 | |
| Mg | 0.2 to 0.5 | |
| Mn | 0 to 0.6 | |
| Cr | 0 to 0.35 | |
| Si | 0 to 0.25 | |
| Ti | 0 to 0.25 | |
| Ni | 0 to 0.15 | |
| res. | 0 to 0.25 |
All values are % weight. Ranges represent what is permitted under applicable standards.
Followup Questions
Similar Alloys
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
Iron in Aluminium Alloys: Impurity and Alloying Element, N. A. Belov et al., 2002
Properties and Selection: Nonferrous Alloys and Special-Purpose Materials, ASM Handbook vol. 2, ASM International, 1993