# As Hot Rolled (M20) C74000 Nickel Silver

M20 C74000 nickel silver is C74000 nickel silver in the M20 (as hot rolled) condition. It has the lowest strength compared to the other variants of C74000 nickel silver. The graph bars on the material properties cards below compare M20 C74000 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

Shear Modulus

44 *GPa* 6.5 *x 10 ^{6} psi*

Tensile Strength: Ultimate (UTS)

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

## Thermal Properties

Latent Heat of Fusion

200 *J/g*

Maximum Temperature: Mechanical

180 *°C* 360 *°F*

Melting Completion (Liquidus)

990 *°C* 1820 *°F*

Melting Onset (Solidus)

950 *°C* 1730 *°F*

Specific Heat Capacity

390 *J/kg-K* 0.094 *BTU/lb-°F*

Thermal Expansion

18 *µm/m-K*

## Electrical Properties

Electrical Conductivity: Equal Volume

40 *% IACS*

Electrical Conductivity: Equal Weight (Specific)

42 *% IACS*

## Otherwise Unclassified Properties

Base Metal Price

30 *% relative*

Density

8.5 *g/cm ^{3}* 530

*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

Stiffness to Weight: Axial

7.7 *points*

Stiffness to Weight: Bending

19 *points*

Strength to Weight: Axial

13 *points*

Strength to Weight: Bending

14 *points*

Thermal Shock Resistance

13 *points*

## Alloy Composition

Cu | 69 to 73.5 | |

Zn | 14.2 to 22 | |

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

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