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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.

Aluminum (Al)Al 87.6 to 92.4
Zinc (Zn)Zn 7.0 to 8.0
Copper (Cu)Cu 0.4 to 1.0
Iron (Fe)Fe 0 to 1.1
Magnesium (Mg)Mg 0.2 to 0.5
Manganese (Mn)Mn 0 to 0.6
Chromium (Cr)Cr 0 to 0.35
Silicon (Si)Si 0 to 0.25
Titanium (Ti)Ti 0 to 0.25
Nickel (Ni)Ni 0 to 0.15
Residualsres. 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