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AWS BNi-9 (N99612) Filler Metal

AWS BNi-9 is a nickel-based filler metal for brazing. Cited properties are appropriate for the as-fabricated (no temper or treatment) condition. BNi-9 is the AWS designation for this material. N99612 is the UNS number.

It has a moderately high tensile strength among nickel-based brazing fillers. In addition, it has a moderately high melting temperature and a moderately high density.

The graph bars on the material properties cards below compare AWS BNi-9 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

0.3

Shear Modulus

72 GPa 10 x 106 psi

Tensile Strength: Ultimate (UTS)

580 MPa 84 x 103 psi

Thermal Properties

Brazing Temperature

1070 to 1200 °C 1950 to 2200 °F

Latent Heat of Fusion

300 J/g

Melting Completion (Liquidus)

1060 °C 1930 °F

Melting Onset (Solidus)

1060 °C 1930 °F

Specific Heat Capacity

480 J/kg-K 0.11 BTU/lb-°F

Thermal Expansion

12 µm/m-K

Otherwise Unclassified Properties

Base Metal Price

60 % relative

Density

8.4 g/cm3 520 lb/ft3

Embodied Carbon

9.3 kg CO2/kg material

Embodied Energy

130 MJ/kg 56 x 103 BTU/lb

Embodied Water

260 L/kg 31 gal/lb

Common Calculations

Stiffness to Weight: Axial

12 points

Stiffness to Weight: Bending

23 points

Strength to Weight: Axial

19 points

Strength to Weight: Bending

18 points

Thermal Shock Resistance

19 points

Alloy Composition

Nickel (Ni) 77.1 to 83.3
Chromium (Cr) 13.5 to 16.5
Boron (B) 3.3 to 4.0
Iron (Fe) 0 to 1.5
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
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