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383.0 (383.0-F, SC102A, A03830) Cast Aluminum

383.0 aluminum is an aluminum alloy formulated for casting. Cited properties are appropriate for the as-fabricated (no temper or treatment) condition. 383.0 is the Aluminum Association (AA) designation for this material. 383 is the SAE designation. And A03830 is the UNS number. Older literature may refer to this material as ASTM SC102 or ASTM SC102A.

The graph bars on the material properties cards below compare 383.0 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

75

Elastic (Young's, Tensile) Modulus

73 GPa 11 x 106 psi

Elongation at Break

3.5 %

Fatigue Strength

150 MPa 21 x 103 psi

Impact Strength: V-Notched Charpy

4.0 J 3.0 ft-lb

Poisson's Ratio

0.33

Shear Modulus

28 GPa 4.0 x 106 psi

Tensile Strength: Ultimate (UTS)

280 MPa 40 x 103 psi

Tensile Strength: Yield (Proof)

150 MPa 22 x 103 psi

Thermal Properties

Latent Heat of Fusion

540 J/g

Maximum Temperature: Mechanical

170 °C 340 °F

Melting Completion (Liquidus)

580 °C 1080 °F

Melting Onset (Solidus)

540 °C 1000 °F

Specific Heat Capacity

880 J/kg-K 0.21 BTU/lb-°F

Thermal Conductivity

96 W/m-K 56 BTU/h-ft-°F

Thermal Expansion

21 µm/m-K

Electrical Properties

Electrical Conductivity: Equal Volume

23 % IACS

Electrical Conductivity: Equal Weight (Specific)

74 % IACS

Otherwise Unclassified Properties

Base Metal Price

10 % relative

Calomel Potential

-690 mV

Density

2.8 g/cm3 170 lb/ft3

Embodied Carbon

7.5 kg CO2/kg material

Embodied Energy

140 MJ/kg 60 x 103 BTU/lb

Embodied Water

1030 L/kg 120 gal/lb

Common Calculations

Resilience: Ultimate (Unit Rupture Work)

8.2 MJ/m3

Resilience: Unit (Modulus of Resilience)

150 kJ/m3

Stiffness to Weight: Axial

15 points

Stiffness to Weight: Bending

50 points

Strength to Weight: Axial

28 points

Strength to Weight: Bending

34 points

Thermal Diffusivity

39 mm2/s

Thermal Shock Resistance

13 points

Alloy Composition

Among cast aluminum alloys, the composition of 383.0 aluminum is notable for containing comparatively high amounts of silicon (Si) and zinc (Zn). Silicon is used to improve casting fluidity and lower melting temperature. It also has a strengthening effect. 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.

Aluminum (Al) 79.7 to 88.5
Silicon (Si) 9.5 to 11.5
Copper (Cu) 2.0 to 3.0
Zinc (Zn) 0 to 3.0
Iron (Fe) 0 to 1.3
Manganese (Mn) 0 to 0.5
Nickel (Ni) 0 to 0.3
Tin (Sn) 0 to 0.15
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 B85: Standard Specification for Aluminum-Alloy Die Castings

Iron in Aluminium Alloys: Impurity and Alloying Element, N. A. Belov et al., 2002

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

ASM Specialty Handbook: Aluminum and Aluminum Alloys, J. R. Davis (editor), 1993