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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

Copper (Cu) 99.9 to 100
Carbon (C) 0 to 0.0050
Phosphorus (P) 0 to 0.0020
Lead (Pb) 0 to 0.0020
Zinc (Zn) 0 to 0.0020
Cadmium (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