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206.0-T7 Cast Aluminum

206.0-T7 aluminum is 206.0 aluminum in the T7 temper. To achieve this temper, the metal is solution heat-treated and stabilized by artificial overaging. It has the highest strength and highest ductility compared to the other variants of 206.0 aluminum.

The graph bars on the material properties cards below compare 206.0-T7 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

Compressive (Crushing) Strength

370 MPa 54 x 103 psi

Elastic (Young's, Tensile) Modulus

71 GPa 10 x 106 psi

Elongation at Break

12 %

Fatigue Strength

210 MPa 30 x 103 psi

Fracture Toughness

43 MPa-m1/2 39 x 103 psi-in1/2

Impact Strength: V-Notched Charpy

9.5 J 7.0 ft-lb

Poisson's Ratio

0.33

Reduction in Area

26 %

Shear Modulus

27 GPa 3.9 x 106 psi

Shear Strength

260 MPa 37 x 103 psi

Tensile Strength: Ultimate (UTS)

440 MPa 63 x 103 psi

Tensile Strength: Yield (Proof)

350 MPa 50 x 103 psi

Thermal Properties

Latent Heat of Fusion

390 J/g

Maximum Temperature: Mechanical

170 °C 340 °F

Melting Completion (Liquidus)

650 °C 1200 °F

Melting Onset (Solidus)

570 °C 1060 °F

Specific Heat Capacity

880 J/kg-K 0.21 BTU/lb-°F

Thermal Conductivity

120 W/m-K 70 BTU/h-ft-°F

Thermal Expansion

19 µm/m-K

Electrical Properties

Electrical Conductivity: Equal Volume

33 % IACS

Electrical Conductivity: Equal Weight (Specific)

99 % IACS

Otherwise Unclassified Properties

Base Metal Price

11 % relative

Calomel Potential

-680 mV

Density

3.0 g/cm3 190 lb/ft3

Embodied Carbon

8.0 kg CO2/kg material

Embodied Energy

150 MJ/kg 64 x 103 BTU/lb

Embodied Water

1150 L/kg 140 gal/lb

Common Calculations

Resilience: Ultimate (Unit Rupture Work)

49 MJ/m3

Resilience: Unit (Modulus of Resilience)

840 kJ/m3

Stiffness to Weight: Axial

13 points

Stiffness to Weight: Bending

46 points

Strength to Weight: Axial

40 points

Strength to Weight: Bending

42 points

Thermal Diffusivity

46 mm2/s

Thermal Shock Resistance

23 points

Alloy Composition

Aluminum (Al)Al 93.3 to 95.3
Copper (Cu)Cu 4.2 to 5.0
Manganese (Mn)Mn 0.2 to 0.5
Magnesium (Mg)Mg 0.15 to 0.35
Titanium (Ti)Ti 0.15 to 0.3
Iron (Fe)Fe 0 to 0.15
Silicon (Si)Si 0 to 0.1
Zinc (Zn)Zn 0 to 0.1
Nickel (Ni)Ni 0 to 0.050
Tin (Sn)Sn 0 to 0.050
Residualsres. 0 to 0.15

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

Followup Questions

Further Reading

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

Aluminum: Properties and Physical Metallurgy, John E. Hatch (editor), 1984

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