# Super-Spring (H14) C65400 Bronze

H14 C65400 bronze is C65400 bronze in the H14 (super spring) temper. It has the highest strength compared to the other variants of C65400 bronze. The graph bars on the material properties cards below compare H14 C65400 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*

Poisson's Ratio

0.34

Rockwell B Hardness

120

Rockwell Superficial 30T Hardness

91

Shear Modulus

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

Tensile Strength: Ultimate (UTS)

1060 *MPa* 150 *x 10 ^{3} psi*

## Thermal Properties

Latent Heat of Fusion

260 *J/g*

Maximum Temperature: Mechanical

200 *°C* 380 *°F*

Melting Completion (Liquidus)

1020 *°C* 1860 *°F*

Melting Onset (Solidus)

960 *°C* 1750 *°F*

Specific Heat Capacity

400 *J/kg-K* 0.1 *BTU/lb-°F*

Thermal Conductivity

36 *W/m-K* 21 *BTU/h-ft-°F*

Thermal Expansion

17 *µm/m-K*

## Electrical Properties

Electrical Conductivity: Equal Volume

7.0 *% IACS*

Electrical Conductivity: Equal Weight (Specific)

7.3 *% IACS*

## Otherwise Unclassified Properties

Base Metal Price

31 *% relative*

Density

8.7 *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

310 *L/kg* 37 *gal/lb*

## Common Calculations

Resilience: Ultimate (Unit Rupture Work)

10 to 480 *MJ/m ^{3}*

Resilience: Unit (Modulus of Resilience)

130 to 3640 *kJ/m ^{3}*

Stiffness to Weight: Axial

7.3 *points*

Stiffness to Weight: Bending

19 *points*

Strength to Weight: Axial

34 *points*

Strength to Weight: Bending

27 *points*

Thermal Diffusivity

10 *mm ^{2}/s*

Thermal Shock Resistance

39 *points*

## Alloy Composition

Cu | 93.8 to 96.1 | |

Si | 2.7 to 3.4 | |

Sn | 1.2 to 1.9 | |

Zn | 0 to 0.5 | |

Cr | 0.010 to 0.12 | |

Pb | 0 to 0.050 | |

res. | 0 to 0.2 |

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

## Followup Questions

## Further Reading

ASTM B96: Standard Specification for Copper-Silicon Alloy Plate, Sheet, Strip, and Rolled Bar for General Purposes and Pressure Vessels

Pressure Vessels: External Pressure Technology, 2nd ed., Carl T. F. Ross, 2011

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