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A356.0 (SG70B, A13560) Cast Aluminum

A356.0 aluminum is an aluminum alloy formulated for casting. A356.0 is the Aluminum Association (AA) designation for this material. A13560 is the UNS number. Additionally, the SAE designation is 336. And the AFNOR (French) designation is A-S7G. Older literature may refer to this material as SG70B, but this is now discouraged.

This material originally entered the market in 1955.

The properties of A356.0 aluminum include five 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 A356.0 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

Elastic (Young's, Tensile) Modulus

70 GPa 10 x 106 psi

Elongation at Break

3.0 to 6.0 %

Fatigue Strength

50 to 90 MPa 7.2 to 13 x 103 psi

Poisson's Ratio

0.33

Shear Modulus

26 GPa 3.8 x 106 psi

Tensile Strength: Ultimate (UTS)

160 to 270 MPa 23 to 39 x 103 psi

Tensile Strength: Yield (Proof)

83 to 200 MPa 12 to 30 x 103 psi

Thermal Properties

Latent Heat of Fusion

500 J/g

Maximum Temperature: Mechanical

170 °C 340 °F

Melting Completion (Liquidus)

610 °C 1130 °F

Melting Onset (Solidus)

570 °C 1060 °F

Solidification (Pattern Maker's) Shrinkage

1.3 %

Specific Heat Capacity

900 J/kg-K 0.22 BTU/lb-°F

Thermal Conductivity

150 W/m-K 87 BTU/h-ft-°F

Thermal Expansion

21 µm/m-K

Electrical Properties

Electrical Conductivity: Equal Volume

40 % IACS

Electrical Conductivity: Equal Weight (Specific)

140 % IACS

Otherwise Unclassified Properties

Base Metal Price

9.5 % relative

Density

2.6 g/cm3 160 lb/ft3

Embodied Carbon

8.0 kg CO2/kg material

Embodied Energy

150 MJ/kg 64 x 103 BTU/lb

Embodied Water

1110 L/kg 130 gal/lb

Common Calculations

Resilience: Ultimate (Unit Rupture Work)

4.8 to 15 MJ/m3

Resilience: Unit (Modulus of Resilience)

49 to 300 kJ/m3

Stiffness to Weight: Axial

15 points

Stiffness to Weight: Bending

53 points

Strength to Weight: Axial

17 to 29 points

Strength to Weight: Bending

25 to 36 points

Thermal Diffusivity

64 mm2/s

Thermal Shock Resistance

7.6 to 13 points

Alloy Composition

Among cast aluminum alloys, the composition of A356.0 aluminum is notable for containing a comparatively high amount of silicon (Si). Silicon is used to improve casting fluidity and lower melting temperature. It also has a strengthening effect.

Aluminum (Al) 91.1 to 93.3
Silicon (Si) 6.5 to 7.5
Magnesium (Mg) 0.25 to 0.45
Iron (Fe) 0 to 0.2
Titanium (Ti) 0 to 0.2
Copper (Cu) 0 to 0.2
Manganese (Mn) 0 to 0.1
Zinc (Zn) 0 to 0.1
Residuals 0 to 0.15

All values are % weight. Ranges represent what is permitted under applicable standards.

Followup Questions

Similar Alloys

Further Reading

ASTM B686: Standard Specification for Aluminum Alloy Castings, High-Strength

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

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