UNS C14181 (BVCu-1x) Vacuum Service Filler Metal
C14181 copper is a copper-based filler metal for brazing. Cited properties are appropriate for the as-fabricated (no temper or treatment) condition. It has a moderately high melting temperature and the highest thermal conductivity among copper-based braze fillers.
The graph bars on the material properties cards below compare C14181 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
120 GPa 17 x 106 psi
Elongation at Break
15 %
Poisson's Ratio
0.34
Shear Modulus
43 GPa 6.3 x 106 psi
Tensile Strength: Ultimate (UTS)
210 MPa 30 x 103 psi
Tensile Strength: Yield (Proof)
130 MPa 18 x 103 psi
Thermal Properties
Brazing Temperature
1090 to 1150 °C 2000 to 2100 °F
Latent Heat of Fusion
210 J/g
Maximum Temperature: Mechanical
200 °C 390 °F
Melting Completion (Liquidus)
1080 °C 1980 °F
Melting Onset (Solidus)
1080 °C 1980 °F
Specific Heat Capacity
390 J/kg-K 0.092 BTU/lb-°F
Thermal Conductivity
380 W/m-K 220 BTU/h-ft-°F
Thermal Expansion
17 µm/m-K
Otherwise Unclassified Properties
Base Metal Price
31 % relative
Density
9.0 g/cm3 560 lb/ft3
Embodied Carbon
2.6 kg CO2/kg material
Embodied Energy
41 MJ/kg 18 x 103 BTU/lb
Embodied Water
310 L/kg 37 gal/lb
Common Calculations
Resilience: Ultimate (Unit Rupture Work)
28 MJ/m3
Resilience: Unit (Modulus of Resilience)
69 kJ/m3
Stiffness to Weight: Axial
7.2 points
Stiffness to Weight: Bending
18 points
Strength to Weight: Axial
6.5 points
Strength to Weight: Bending
8.8 points
Thermal Diffusivity
110 mm2/s
Thermal Shock Resistance
7.4 points
Alloy Composition
| Cu | 99.9 to 100 | |
| C | 0 to 0.0050 | |
| P | 0 to 0.0020 | |
| Pb | 0 to 0.0020 | |
| Zn | 0 to 0.0020 | |
| Cd | 0 to 0.0020 |
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