# As Hot Rolled (M20) C71500 Copper-Nickel

M20 C71500 copper-nickel is C71500 copper-nickel in the M20 (as hot rolled) condition. It has the lowest strength compared to the other variants of C71500 copper-nickel. The graph bars on the material properties cards below compare M20 C71500 copper-nickel 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

140 *GPa* 20 *x 10 ^{6} psi*

Poisson's Ratio

0.33

Shear Modulus

52 *GPa* 7.5 *x 10 ^{6} psi*

Tensile Strength: Ultimate (UTS)

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

## Thermal Properties

Latent Heat of Fusion

230 *J/g*

Maximum Temperature: Mechanical

260 *°C* 500 *°F*

Melting Completion (Liquidus)

1240 *°C* 2260 *°F*

Melting Onset (Solidus)

1170 *°C* 2140 *°F*

Specific Heat Capacity

400 *J/kg-K* 0.1 *BTU/lb-°F*

Thermal Conductivity

28 *W/m-K* 16 *BTU/h-ft-°F*

Thermal Expansion

16 *µm/m-K*

## Electrical Properties

Electrical Conductivity: Equal Volume

4.6 *% IACS*

Electrical Conductivity: Equal Weight (Specific)

4.7 *% IACS*

## Otherwise Unclassified Properties

Base Metal Price

41 *% relative*

Calomel Potential

-250 *mV*

Density

8.9 *g/cm ^{3}* 560

*lb/ft*

^{3}Embodied Carbon

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

Embodied Energy

74 *MJ/kg* 32 *x 10 ^{3} BTU/lb*

Embodied Water

280 *L/kg* 34 *gal/lb*

## Common Calculations

Stiffness to Weight: Axial

8.6 *points*

Stiffness to Weight: Bending

19 *points*

Strength to Weight: Axial

12 *points*

Strength to Weight: Bending

13 *points*

Thermal Diffusivity

7.7 *mm ^{2}/s*

Thermal Shock Resistance

12 *points*

## Alloy Composition

Cu | 63.5 to 70.6 | |

Ni | 29 to 33 | |

Fe | 0.4 to 1.0 | |

Mn | 0 to 1.0 | |

Zn | 0 to 1.0 | |

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