# Half-Hard (H02) C63800 Bronze

H02 C63800 bronze is C63800 bronze in the H02 (half hard) temper. The graph bars on the material properties cards below compare H02 C63800 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* 17 *x 10 ^{6} psi*

Elongation at Break

19 *%*

Poisson's Ratio

0.34

Rockwell B Hardness

97

Rockwell Superficial 30T Hardness

80

Shear Modulus

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

Shear Strength

460 *MPa* 66 *x 10 ^{3} psi*

Tensile Strength: Ultimate (UTS)

730 *MPa* 110 *x 10 ^{3} psi*

Tensile Strength: Yield (Proof)

380 *MPa* 55 *x 10 ^{3} psi*

## Thermal Properties

Latent Heat of Fusion

240 *J/g*

Maximum Temperature: Mechanical

200 *°C* 400 *°F*

Melting Completion (Liquidus)

1030 *°C* 1880 *°F*

Melting Onset (Solidus)

1000 *°C* 1830 *°F*

Specific Heat Capacity

410 *J/kg-K* 0.1 *BTU/lb-°F*

Thermal Conductivity

40 *W/m-K* 23 *BTU/h-ft-°F*

Thermal Expansion

17 *µm/m-K*

## Electrical Properties

Electrical Conductivity: Equal Volume

10 *% IACS*

Electrical Conductivity: Equal Weight (Specific)

10 *% IACS*

## Otherwise Unclassified Properties

Base Metal Price

30 *% relative*

Density

8.6 *g/cm ^{3}* 540

*lb/ft*

^{3}Embodied Carbon

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

Embodied Energy

45 *MJ/kg* 19 *x 10 ^{3} BTU/lb*

Embodied Water

330 *L/kg* 39 *gal/lb*

## Common Calculations

Resilience: Ultimate (Unit Rupture Work)

120 *MJ/m ^{3}*

Resilience: Unit (Modulus of Resilience)

620 *kJ/m ^{3}*

Stiffness to Weight: Axial

7.4 *points*

Stiffness to Weight: Bending

19 *points*

Strength to Weight: Axial

24 *points*

Strength to Weight: Bending

21 *points*

Thermal Diffusivity

11 *mm ^{2}/s*

Thermal Shock Resistance

26 *points*

## Alloy Composition

Cu | 92.4 to 95.8 | |

Al | 2.5 to 3.1 | |

Si | 1.5 to 2.1 | |

Co | 0.25 to 0.55 | |

Zn | 0 to 0.8 | |

Ni | 0 to 0.2 | |

Fe | 0 to 0.2 | |

Mn | 0 to 0.1 | |

Pb | 0 to 0.050 | |

res. | 0 to 0.5 |

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

## Followup Questions

## Further Reading

ASTM B422: Standard Specification for Copper-Aluminum-Silicon-Cobalt Alloy, Copper-Nickel-Silicon-Magnesium Alloy, Copper-Nickel-Silicon Alloy, Copper-Nickel-Aluminum-Magnesium Alloy, and Copper- Nickel-Tin Alloy Sheet and Strip

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

CRC Materials Science and Engineering Handbook, 4th ed., James F. Shackelford et al. (editors), 2015