# 206.0-T4 Cast Aluminum

206.0-T4 aluminum is 206.0 aluminum in the T4 temper. To achieve this temper, the metal is solution heat-treated and naturally aged. It has the lowest strength and lowest ductility compared to the other variants of 206.0 aluminum.

The graph bars on the material properties cards below compare 206.0-T4 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

95

Elastic (Young's, Tensile) Modulus

71 *GPa* 10 *x 10 ^{6} psi*

Elongation at Break

8.4 *%*

Fatigue Strength

88 *MPa* 13 *x 10 ^{3} psi*

Impact Strength: V-Notched Charpy

9.5 *J* 7.0 *ft-lb*

Poisson's Ratio

0.33

Shear Modulus

27 *GPa* 3.9 *x 10 ^{6} psi*

Tensile Strength: Ultimate (UTS)

330 *MPa* 47 *x 10 ^{3} psi*

Tensile Strength: Yield (Proof)

190 *MPa* 28 *x 10 ^{3} 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/cm ^{3}* 190

*lb/ft*

^{3}Embodied Carbon

8.0 *kg CO _{2}/kg material*

Embodied Energy

150 *MJ/kg* 64 *x 10 ^{3} BTU/lb*

Embodied Water

1150 *L/kg* 140 *gal/lb*

## Common Calculations

Resilience: Ultimate (Unit Rupture Work)

24 *MJ/m ^{3}*

Resilience: Unit (Modulus of Resilience)

270 *kJ/m ^{3}*

Stiffness to Weight: Axial

13 *points*

Stiffness to Weight: Bending

46 *points*

Strength to Weight: Axial

30 *points*

Strength to Weight: Bending

35 *points*

Thermal Diffusivity

46 *mm ^{2}/s*

Thermal Shock Resistance

17 *points*

## Alloy Composition

Al | 93.3 to 95.3 | |

Cu | 4.2 to 5.0 | |

Mn | 0.2 to 0.5 | |

Mg | 0.15 to 0.35 | |

Ti | 0.15 to 0.3 | |

Fe | 0 to 0.15 | |

Si | 0 to 0.1 | |

Zn | 0 to 0.1 | |

Ni | 0 to 0.050 | |

Sn | 0 to 0.050 | |

res. | 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