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AWS BNi-5 (N99650) Filler Metal

AWS BNi-5 is a nickel-based filler metal for brazing. Cited properties are appropriate for the as-fabricated (no temper or treatment) condition. BNi-5 is the AWS designation for this material. N99650 is the UNS number.

It has the highest melting temperature among the nickel-based brazing fillers in the database.

The graph bars on the material properties cards below compare AWS BNi-5 to: nickel-based brazing fillers (top), all nickel 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

190 GPa 27 x 106 psi

Poisson's Ratio

0.29

Shear Modulus

72 GPa 10 x 106 psi

Tensile Strength: Ultimate (UTS)

470 MPa 68 x 103 psi

Thermal Properties

Brazing Temperature

1150 to 1200 °C 2100 to 2200 °F

Latent Heat of Fusion

470 J/g

Melting Completion (Liquidus)

1140 °C 2080 °F

Melting Onset (Solidus)

1080 °C 1970 °F

Specific Heat Capacity

510 J/kg-K 0.12 BTU/lb-°F

Thermal Expansion

12 µm/m-K

Otherwise Unclassified Properties

Base Metal Price

55 % relative

Density

7.7 g/cm3 480 lb/ft3

Embodied Carbon

8.9 kg CO2/kg material

Embodied Energy

130 MJ/kg 55 x 103 BTU/lb

Embodied Water

260 L/kg 31 gal/lb

Common Calculations

Stiffness to Weight: Axial

13 points

Stiffness to Weight: Bending

25 points

Strength to Weight: Axial

17 points

Strength to Weight: Bending

17 points

Thermal Shock Resistance

15 points

Alloy Composition

Nickel (Ni) 69.1 to 71.8
Chromium (Cr) 18.5 to 19.5
Silicon (Si) 9.8 to 10.5
Cobalt (Co) 0 to 0.1
Carbon (C) 0 to 0.060
Aluminum (Al) 0 to 0.050
Titanium (Ti) 0 to 0.050
Zirconium (Zr) 0 to 0.050
Boron (B) 0 to 0.030
Phosphorus (P) 0 to 0.020
Sulfur (S) 0 to 0.020
Selenium (Se) 0 to 0.0050
Residuals 0 to 0.5

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