# UNS C55180 (BCuP-1) Filler Metal

C55180 copper is a copper-based filler metal for brazing. Cited properties are appropriate for the as-fabricated (no temper or treatment) condition. BCuP-1 is the AWS designation for this material. C55180 is the UNS number.

It has a moderately low embodied energy among the copper-based braze fillers in the database.

The graph bars on the material properties cards below compare C55180 copper to: copper-based braze fillers (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* 16 *x 10 ^{6} psi*

Elongation at Break

20 *%*

Poisson's Ratio

0.34

Shear Modulus

41 *GPa* 6.0 *x 10 ^{6} psi*

Tensile Strength: Ultimate (UTS)

200 *MPa* 29 *x 10 ^{3} psi*

Tensile Strength: Yield (Proof)

100 *MPa* 15 *x 10 ^{3} psi*

## Thermal Properties

Brazing Temperature

790 to 930 *°C* 1450 to 1700 *°F*

Latent Heat of Fusion

200 *J/g*

Maximum Temperature: Mechanical

200 *°C* 390 *°F*

Melting Completion (Liquidus)

920 *°C* 1700 *°F*

Melting Onset (Solidus)

710 *°C* 1310 *°F*

Specific Heat Capacity

400 *J/kg-K* 0.1 *BTU/lb-°F*

Thermal Conductivity

200 *W/m-K* 110 *BTU/h-ft-°F*

Thermal Expansion

17 *µm/m-K*

## Otherwise Unclassified Properties

Base Metal Price

29 *% relative*

Density

8.6 *g/cm ^{3}* 540

*lb/ft*

^{3}Embodied Carbon

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

Embodied Energy

39 *MJ/kg* 17 *x 10 ^{3} BTU/lb*

Embodied Water

290 *L/kg* 35 *gal/lb*

## Common Calculations

Resilience: Ultimate (Unit Rupture Work)

34 *MJ/m ^{3}*

Resilience: Unit (Modulus of Resilience)

48 *kJ/m ^{3}*

Stiffness to Weight: Axial

7.1 *points*

Stiffness to Weight: Bending

18 *points*

Strength to Weight: Axial

6.4 *points*

Strength to Weight: Bending

8.8 *points*

Thermal Diffusivity

56 *mm ^{2}/s*

Thermal Shock Resistance

7.9 *points*

## Alloy Composition

Cu | 94.7 to 95.2 | |

P | 4.8 to 5.2 | |

res. | 0 to 0.15 |

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

## Followup Questions

## Similar Alloys

## Further Reading

AWS A5.8: Specification for Filler Metals for Brazing and Braze Welding

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