# As Hot Rolled (M20) C77000 Nickel Silver

M20 C77000 nickel silver is C77000 nickel silver in the M20 (as hot rolled) condition. It has the second lowest strength compared to the other variants of C77000 nickel silver. The graph bars on the material properties cards below compare M20 C77000 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

0.31

Shear Modulus

46 *GPa* 6.7 *x 10 ^{6} psi*

Tensile Strength: Ultimate (UTS)

480 *MPa* 70 *x 10 ^{3} psi*

## Thermal Properties

Latent Heat of Fusion

200 *J/g*

Maximum Temperature: Mechanical

180 *°C* 360 *°F*

Melting Completion (Liquidus)

1050 *°C* 1930 *°F*

Melting Onset (Solidus)

1000 *°C* 1840 *°F*

Specific Heat Capacity

400 *J/kg-K* 0.095 *BTU/lb-°F*

Thermal Conductivity

29 *W/m-K* 17 *BTU/h-ft-°F*

Thermal Expansion

17 *µm/m-K*

## Electrical Properties

Electrical Conductivity: Equal Volume

5.5 *% IACS*

Electrical Conductivity: Equal Weight (Specific)

6.0 *% IACS*

## Otherwise Unclassified Properties

Base Metal Price

31 *% relative*

Density

8.3 *g/cm ^{3}* 520

*lb/ft*

^{3}Embodied Carbon

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

Embodied Energy

63 *MJ/kg* 27 *x 10 ^{3} BTU/lb*

Embodied Water

300 *L/kg* 36 *gal/lb*

## Common Calculations

Stiffness to Weight: Axial

8.1 *points*

Stiffness to Weight: Bending

20 *points*

Strength to Weight: Axial

16 *points*

Strength to Weight: Bending

16 *points*

Thermal Diffusivity

8.8 *mm ^{2}/s*

Thermal Shock Resistance

17 *points*

## Alloy Composition

Cu | 53.5 to 56.5 | |

Zn | 22.7 to 30 | |

Ni | 16.5 to 19.5 | |

Mn | 0 to 0.5 | |

Fe | 0 to 0.25 | |

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

Copper: Its Trade, Manufacture, Use, and Environmental Status, Gunter Joseph, 2001

Properties and Selection: Nonferrous Alloys and Special-Purpose Materials, ASM Handbook vol. 2, ASM International, 1993