# TM08 Mill Hardened C72900 Copper-Nickel

TM08 C72900 copper-nickel is C72900 copper-nickel in the TM08 (mill hardened to maximum) temper. It has the lowest ductility compared to the other variants of C72900 copper-nickel. The graph bars on the material properties cards below compare TM08 C72900 copper-nickel to: wrought copper-nickels (top), all copper 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

120 *GPa* 18 *x 10 ^{6} psi*

Elongation at Break

6.0 *%*

Poisson's Ratio

0.34

Shear Modulus

45 *GPa* 6.6 *x 10 ^{6} psi*

Shear Strength

550 *MPa* 80 *x 10 ^{3} psi*

Tensile Strength: Ultimate (UTS)

940 *MPa* 140 *x 10 ^{3} psi*

Tensile Strength: Yield (Proof)

840 *MPa* 120 *x 10 ^{3} psi*

## Thermal Properties

Latent Heat of Fusion

210 *J/g*

Maximum Temperature: Mechanical

210 *°C* 400 *°F*

Melting Completion (Liquidus)

1120 *°C* 2040 *°F*

Melting Onset (Solidus)

950 *°C* 1740 *°F*

Specific Heat Capacity

380 *J/kg-K* 0.091 *BTU/lb-°F*

Thermal Conductivity

29 *W/m-K* 17 *BTU/h-ft-°F*

Thermal Expansion

17 *µm/m-K*

## Electrical Properties

Electrical Conductivity: Equal Volume

7.8 *% IACS*

Electrical Conductivity: Equal Weight (Specific)

8.0 *% IACS*

## Otherwise Unclassified Properties

Base Metal Price

39 *% relative*

Density

8.8 *g/cm ^{3}* 550

*lb/ft*

^{3}Embodied Carbon

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

Embodied Energy

72 *MJ/kg* 31 *x 10 ^{3} BTU/lb*

Embodied Water

360 *L/kg* 43 *gal/lb*

## Common Calculations

Resilience: Ultimate (Unit Rupture Work)

55 *MJ/m ^{3}*

Resilience: Unit (Modulus of Resilience)

2940 *kJ/m ^{3}*

Stiffness to Weight: Axial

7.6 *points*

Stiffness to Weight: Bending

19 *points*

Strength to Weight: Axial

30 *points*

Strength to Weight: Bending

24 *points*

Thermal Diffusivity

8.6 *mm ^{2}/s*

Thermal Shock Resistance

33 *points*

## Alloy Composition

Cu | 74.1 to 78 | |

Ni | 14.5 to 15.5 | |

Sn | 7.5 to 8.5 | |

Fe | 0 to 0.5 | |

Zn | 0 to 0.5 | |

Mn | 0 to 0.3 | |

Mg | 0 to 0.15 | |

Nb | 0 to 0.1 | |

Pb | 0 to 0.020 | |

res. | 0 to 0.3 |

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