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319.0 (SC64D, A03190) Cast Aluminum

319.0 aluminum is an aluminum alloy formulated for casting. 319.0 is the Aluminum Association (AA) designation for this material. A03190 is the UNS number. Additionally, the SAE designation is 326. The British Standard (BS) designation is LM4. And the AFNOR (French) designation is A-S5U. Older literature may refer to this material as ASTM SC64D, but this is now discouraged.

The properties of 319.0 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 319.0 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

78 to 84

Elastic (Young's, Tensile) Modulus

72 GPa 10 x 106 psi

Elongation at Break

1.8 to 2.0 %

Fatigue Strength

76 to 80 MPa 11 to 12 x 103 psi

Poisson's Ratio

0.33

Shear Modulus

27 GPa 3.9 x 106 psi

Shear Strength

170 to 210 MPa 24 to 30 x 103 psi

Tensile Strength: Ultimate (UTS)

190 to 240 MPa 27 to 35 x 103 psi

Tensile Strength: Yield (Proof)

110 to 180 MPa 16 to 26 x 103 psi

Thermal Properties

Latent Heat of Fusion

480 J/g

Maximum Temperature: Mechanical

170 °C 340 °F

Melting Completion (Liquidus)

600 °C 1120 °F

Melting Onset (Solidus)

540 °C 1000 °F

Solidification (Pattern Maker's) Shrinkage

1.3 %

Specific Heat Capacity

880 J/kg-K 0.21 BTU/lb-°F

Thermal Conductivity

110 W/m-K 65 BTU/h-ft-°F

Thermal Expansion

22 µm/m-K

Electrical Properties

Electrical Conductivity: Equal Volume

27 % IACS

Electrical Conductivity: Equal Weight (Specific)

84 % IACS

Otherwise Unclassified Properties

Base Metal Price

10 % relative

Density

2.9 g/cm3 180 lb/ft3

Embodied Carbon

7.7 kg CO2/kg material

Embodied Energy

140 MJ/kg 62 x 103 BTU/lb

Embodied Water

1080 L/kg 130 gal/lb

Common Calculations

Resilience: Ultimate (Unit Rupture Work)

3.3 to 3.9 MJ/m3

Resilience: Unit (Modulus of Resilience)

88 to 220 kJ/m3

Stiffness to Weight: Axial

14 points

Stiffness to Weight: Bending

48 points

Strength to Weight: Axial

18 to 24 points

Strength to Weight: Bending

25 to 30 points

Thermal Diffusivity

44 mm2/s

Thermal Shock Resistance

8.6 to 11 points

Alloy Composition

Among cast aluminum alloys, the composition of 319.0 aluminum is notable for containing a comparatively high amount of copper (Cu). Copper is used to improve strength. This comes at the cost of a decrease in corrosion resistance and weldability.

Aluminum (Al) 85.8 to 91.5
Silicon (Si) 5.5 to 6.5
Copper (Cu) 3.0 to 4.0
Iron (Fe) 0 to 1.0
Zinc (Zn) 0 to 1.0
Manganese (Mn) 0 to 0.5
Nickel (Ni) 0 to 0.35
Titanium (Ti) 0 to 0.25
Magnesium (Mg) 0 to 0.1
Residuals 0 to 0.5

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

Handbook of Aluminum vol. 2: Alloy Production and Materials Manufacturing, George Totten and D. Scott MacKenzie (editors), 2003

Advanced Materials in Automotive Engineering, Jason Rowe (editor), 2012

Properties and Selection: Nonferrous Alloys and Special-Purpose Materials, ASM Handbook vol. 2, ASM International, 1993