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 106 psi
Elongation at Break
20 %
Poisson's Ratio
0.34
Shear Modulus
41 GPa 6.0 x 106 psi
Tensile Strength: Ultimate (UTS)
200 MPa 29 x 103 psi
Tensile Strength: Yield (Proof)
100 MPa 15 x 103 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/cm3 540 lb/ft3
Embodied Carbon
2.5 kg CO2/kg material
Embodied Energy
39 MJ/kg 17 x 103 BTU/lb
Embodied Water
290 L/kg 35 gal/lb
Common Calculations
Resilience: Ultimate (Unit Rupture Work)
34 MJ/m3
Resilience: Unit (Modulus of Resilience)
48 kJ/m3
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 mm2/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