# Drawn and Stress Relieved (HR50) C63000 Bronze

HR50 C63000 bronze is C63000 bronze in the HR50 (drawn and stress relieved) condition. It has the second highest strength and lowest ductility compared to the other variants of C63000 bronze. The graph bars on the material properties cards below compare HR50 C63000 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

120 *GPa* 17 *x 10 ^{6} psi*

Elongation at Break

7.9 *%*

Poisson's Ratio

0.34

Shear Modulus

44 *GPa* 6.3 *x 10 ^{6} psi*

Shear Strength

420 *MPa* 61 *x 10 ^{3} psi*

Tensile Strength: Ultimate (UTS)

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

Tensile Strength: Yield (Proof)

360 *MPa* 52 *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)

1040 *°C* 1900 *°F*

Specific Heat Capacity

440 *J/kg-K* 0.11 *BTU/lb-°F*

Thermal Conductivity

39 *W/m-K* 23 *BTU/h-ft-°F*

Thermal Expansion

18 *µm/m-K*

## Electrical Properties

Electrical Conductivity: Equal Volume

7.0 *% IACS*

Electrical Conductivity: Equal Weight (Specific)

7.6 *% IACS*

## Otherwise Unclassified Properties

Base Metal Price

29 *% relative*

Density

8.2 *g/cm ^{3}* 510

*lb/ft*

^{3}Embodied Carbon

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

Embodied Energy

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

Embodied Water

390 *L/kg* 46 *gal/lb*

## Common Calculations

Resilience: Ultimate (Unit Rupture Work)

47 *MJ/m ^{3}*

Resilience: Unit (Modulus of Resilience)

550 *kJ/m ^{3}*

Stiffness to Weight: Axial

7.9 *points*

Stiffness to Weight: Bending

20 *points*

Strength to Weight: Axial

24 *points*

Strength to Weight: Bending

22 *points*

Thermal Diffusivity

11 *mm ^{2}/s*

Thermal Shock Resistance

25 *points*

## Alloy Composition

Cu | 76.8 to 85 | |

Al | 9.0 to 11 | |

Ni | 4.0 to 5.5 | |

Fe | 2.0 to 4.0 | |

Mn | 0 to 1.5 | |

Zn | 0 to 0.3 | |

Si | 0 to 0.25 | |

Sn | 0 to 0.2 | |

res. | 0 to 0.5 |

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

## Followup Questions

## Further Reading

ASTM B150: Standard Specification for Aluminum Bronze Rod, Bar, and Shapes

ASTM B124: Standard Specification for Copper and Copper Alloy Forging Rod, Bar, and Shapes

ASTM B283: Standard Specification for Copper and Copper-Alloy Die Forgings (Hot-Pressed)

ASM Specialty Handbook: Copper and Copper Alloys, J. R. Davis (editor), 2001