# UNS C62500 Aluminum-Iron Bronze

C62500 bronze is a bronze formulated for primary forming into wrought products. Cited properties are appropriate for the M30 (as hot extruded) condition. It has the lowest ductility among wrought bronzes. In addition, it has the highest heat capacity and a fairly high melting temperature.

The graph bars on the material properties cards below compare C62500 bronze to: wrought bronzes (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

110 *GPa* 16 *x 10 ^{6} psi*

Elongation at Break

1.0 *%*

Fatigue Strength

460 *MPa* 67 *x 10 ^{3} psi*

Poisson's Ratio

0.34

Rockwell B Hardness

29

Shear Modulus

42 *GPa* 6.2 *x 10 ^{6} psi*

Shear Strength

410 *MPa* 60 *x 10 ^{3} psi*

Tensile Strength: Ultimate (UTS)

690 *MPa* 100 *x 10 ^{3} psi*

Tensile Strength: Yield (Proof)

410 *MPa* 60 *x 10 ^{3} psi*

## Thermal Properties

Latent Heat of Fusion

230 *J/g*

Maximum Temperature: Mechanical

230 *°C* 450 *°F*

Melting Completion (Liquidus)

1050 *°C* 1930 *°F*

Melting Onset (Solidus)

1050 *°C* 1920 *°F*

Specific Heat Capacity

460 *J/kg-K* 0.11 *BTU/lb-°F*

Thermal Conductivity

47 *W/m-K* 27 *BTU/h-ft-°F*

Thermal Expansion

18 *µm/m-K*

## Electrical Properties

Electrical Conductivity: Equal Volume

10 *% IACS*

Electrical Conductivity: Equal Weight (Specific)

11 *% IACS*

## Otherwise Unclassified Properties

Base Metal Price

26 *% relative*

Density

8.1 *g/cm ^{3}* 500

*lb/ft*

^{3}Embodied Carbon

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

Embodied Energy

55 *MJ/kg* 24 *x 10 ^{3} BTU/lb*

Embodied Water

410 *L/kg* 49 *gal/lb*

## Common Calculations

Resilience: Ultimate (Unit Rupture Work)

6.0 *MJ/m ^{3}*

Resilience: Unit (Modulus of Resilience)

750 *kJ/m ^{3}*

Stiffness to Weight: Axial

7.8 *points*

Stiffness to Weight: Bending

20 *points*

Strength to Weight: Axial

24 *points*

Strength to Weight: Bending

22 *points*

Thermal Diffusivity

13 *mm ^{2}/s*

Thermal Shock Resistance

24 *points*

## Alloy Composition

Among wrought copper alloys, the composition of C62500 bronze is notable for including aluminum (Al) and containing a comparatively high amount of iron (Fe). Aluminum is used to add strength and oxidation resistance. Iron is used to increase strength inexpensively.

Cu | 78.5 to 84 | |

Al | 12.5 to 13.5 | |

Fe | 3.5 to 5.5 | |

Mn | 0 to 2.0 | |

res. | 0 to 0.5 |

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