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242.0-T2 Cast Aluminum

242.0-T2 aluminum is 242.0 aluminum in the T2 temper. It has the second lowest strength compared to the other variants of 242.0 aluminum. The graph bars on the material properties cards below compare 242.0-T2 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

70

Elastic (Young's, Tensile) Modulus

73 GPa 11 x 106 psi

Elongation at Break

1.0 %

Fatigue Strength

55 MPa 8.0 x 103 psi

Poisson's Ratio

0.33

Shear Modulus

27 GPa 4.0 x 106 psi

Shear Strength

150 MPa 21 x 103 psi

Tensile Strength: Ultimate (UTS)

190 MPa 27 x 103 psi

Tensile Strength: Yield (Proof)

130 MPa 18 x 103 psi

Thermal Properties

Latent Heat of Fusion

390 J/g

Maximum Temperature: Mechanical

210 °C 400 °F

Melting Completion (Liquidus)

640 °C 1180 °F

Melting Onset (Solidus)

530 °C 990 °F

Solidification (Pattern Maker's) Shrinkage

1.3 %

Specific Heat Capacity

870 J/kg-K 0.21 BTU/lb-°F

Thermal Conductivity

170 W/m-K 97 BTU/h-ft-°F

Thermal Expansion

22 µm/m-K

Electrical Properties

Electrical Conductivity: Equal Volume

44 % IACS

Electrical Conductivity: Equal Weight (Specific)

130 % IACS

Otherwise Unclassified Properties

Base Metal Price

12 % relative

Calomel Potential

-650 mV

Density

3.1 g/cm3 190 lb/ft3

Embodied Carbon

8.3 kg CO2/kg material

Embodied Energy

150 MJ/kg 64 x 103 BTU/lb

Embodied Water

1130 L/kg 130 gal/lb

Common Calculations

Resilience: Ultimate (Unit Rupture Work)

1.7 MJ/m3

Resilience: Unit (Modulus of Resilience)

110 kJ/m3

Stiffness to Weight: Axial

13 points

Stiffness to Weight: Bending

45 points

Strength to Weight: Axial

17 points

Strength to Weight: Bending

23 points

Thermal Diffusivity

62 mm2/s

Thermal Shock Resistance

8.1 points

Alloy Composition

Aluminum (Al)Al 88.4 to 93.6
Copper (Cu)Cu 3.5 to 4.5
Nickel (Ni)Ni 1.7 to 2.3
Magnesium (Mg)Mg 1.2 to 1.8
Iron (Fe)Fe 0 to 1.0
Silicon (Si)Si 0 to 0.7
Manganese (Mn)Mn 0 to 0.35
Zinc (Zn)Zn 0 to 0.35
Chromium (Cr)Cr 0 to 0.25
Titanium (Ti)Ti 0 to 0.25
Residualsres. 0 to 0.15

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

Followup Questions

Further Reading

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