# Spring-Tempered (H08) C74500 Nickel Silver

H08 C74500 nickel silver is C74500 nickel silver in the H08 (spring) temper. It has the highest strength compared to the other variants of C74500 nickel silver. The graph bars on the material properties cards below compare H08 C74500 nickel silver 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* 17 *x 10 ^{6} psi*

Poisson's Ratio

0.32

Rockwell B Hardness

94

Rockwell Superficial 30T Hardness

79

Shear Modulus

44 *GPa* 6.4 *x 10 ^{6} psi*

Tensile Strength: Ultimate (UTS)

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

## Thermal Properties

Latent Heat of Fusion

190 *J/g*

Maximum Temperature: Mechanical

170 *°C* 340 *°F*

Melting Completion (Liquidus)

1020 *°C* 1870 *°F*

Melting Onset (Solidus)

970 *°C* 1780 *°F*

Specific Heat Capacity

390 *J/kg-K* 0.094 *BTU/lb-°F*

Thermal Conductivity

45 *W/m-K* 26 *BTU/h-ft-°F*

Thermal Expansion

19 *µm/m-K*

## Electrical Properties

Electrical Conductivity: Equal Volume

9.0 *% IACS*

Electrical Conductivity: Equal Weight (Specific)

9.7 *% IACS*

## Otherwise Unclassified Properties

Base Metal Price

29 *% relative*

Density

8.3 *g/cm ^{3}* 520

*lb/ft*

^{3}Embodied Carbon

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

Embodied Energy

54 *MJ/kg* 23 *x 10 ^{3} BTU/lb*

Embodied Water

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

## Common Calculations

Resilience: Ultimate (Unit Rupture Work)

12 to 160 *MJ/m ^{3}*

Resilience: Unit (Modulus of Resilience)

620 to 1540 *kJ/m ^{3}*

Stiffness to Weight: Axial

7.7 *points*

Stiffness to Weight: Bending

19 *points*

Strength to Weight: Axial

23 *points*

Strength to Weight: Bending

21 *points*

Thermal Diffusivity

14 *mm ^{2}/s*

Thermal Shock Resistance

23 *points*

## Alloy Composition

Cu | 63.5 to 66.5 | |

Zn | 21.2 to 27.5 | |

Ni | 9.0 to 11 | |

Mn | 0 to 0.5 | |

Fe | 0 to 0.25 | |

Pb | 0 to 0.1 | |

res. | 0 to 0.5 |

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

## Followup Questions

## Further Reading

ASTM B122: Standard Specification for Copper-Nickel-Tin Alloy, Copper-Nickel-Zinc Alloy (Nickel Silver), and Copper-Nickel Alloy Plate, Sheet, Strip, and Rolled Bar

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