# EN AC-21200-T7 Cast Aluminum

EN AC-21200-T7 is EN AC-21200 aluminum in the T7 temper. To achieve this temper, the metal is solution heat-treated and stabilized by artificial overaging. The graph bars on the material properties cards below compare EN AC-21200-T7 to: Euronorm (EN) 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

130

Elastic (Young's, Tensile) Modulus

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

Elongation at Break

3.9 *%*

Fatigue Strength

130 *MPa* 19 *x 10 ^{3} psi*

Poisson's Ratio

0.33

Shear Modulus

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

Tensile Strength: Ultimate (UTS)

440 *MPa* 63 *x 10 ^{3} psi*

Tensile Strength: Yield (Proof)

360 *MPa* 52 *x 10 ^{3} psi*

## Thermal Properties

Latent Heat of Fusion

390 *J/g*

Maximum Temperature: Mechanical

170 *°C* 340 *°F*

Melting Completion (Liquidus)

660 *°C* 1230 *°F*

Melting Onset (Solidus)

550 *°C* 1020 *°F*

Specific Heat Capacity

880 *J/kg-K* 0.21 *BTU/lb-°F*

Thermal Conductivity

130 *W/m-K* 74 *BTU/h-ft-°F*

Thermal Expansion

23 *µm/m-K*

## Electrical Properties

Electrical Conductivity: Equal Volume

34 *% IACS*

Electrical Conductivity: Equal Weight (Specific)

100 *% IACS*

## Otherwise Unclassified Properties

Base Metal Price

10 *% relative*

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)

16 *MJ/m ^{3}*

Resilience: Unit (Modulus of Resilience)

930 *kJ/m ^{3}*

Stiffness to Weight: Axial

13 *points*

Stiffness to Weight: Bending

46 *points*

Strength to Weight: Axial

40 *points*

Strength to Weight: Bending

43 *points*

Thermal Diffusivity

49 *mm ^{2}/s*

Thermal Shock Resistance

19 *points*

## Alloy Composition

Al | 93.3 to 95.7 | |

Cu | 4.0 to 5.0 | |

Mn | 0.2 to 0.5 | |

Mg | 0.15 to 0.5 | |

Fe | 0 to 0.2 | |

Si | 0 to 0.1 | |

Ti | 0 to 0.1 | |

Zn | 0 to 0.1 | |

Ni | 0 to 0.050 | |

Sn | 0 to 0.030 | |

Pb | 0 to 0.030 | |

res. | 0 to 0.1 |

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

## Followup Questions

## Further Reading

EN 1706: Aluminium and aluminium alloys. Castings. Chemical composition and mechanical properties

Handbook of Aluminum vol. 2: Alloy Production and Materials Manufacturing, George Totten and D. Scott MacKenzie (editors), 2003