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AWS BNi-2 (N99620) Filler Metal

AWS BNi-2 is a nickel-based filler metal for brazing. Cited properties are appropriate for the as-fabricated (no temper or treatment) condition. BNi-2 is the AWS designation for this material. N99620 is the UNS number.

It has a moderately low tensile strength among the nickel-based brazing fillers in the database.

The graph bars on the material properties cards below compare AWS BNi-2 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

180 GPa 26 x 106 psi

Poisson's Ratio

0.3

Shear Modulus

68 GPa 9.9 x 106 psi

Tensile Strength: Ultimate (UTS)

440 MPa 64 x 103 psi

Thermal Properties

Brazing Temperature

1010 to 1180 °C 1850 to 2150 °F

Latent Heat of Fusion

360 J/g

Melting Completion (Liquidus)

1000 °C 1830 °F

Melting Onset (Solidus)

970 °C 1780 °F

Specific Heat Capacity

490 J/kg-K 0.12 BTU/lb-°F

Thermal Expansion

11 µm/m-K

Otherwise Unclassified Properties

Base Metal Price

55 % relative

Density

8.2 g/cm3 510 lb/ft3

Embodied Carbon

9.3 kg CO2/kg material

Embodied Energy

130 MJ/kg 56 x 103 BTU/lb

Embodied Water

230 L/kg 27 gal/lb

Common Calculations

Stiffness to Weight: Axial

12 points

Stiffness to Weight: Bending

23 points

Strength to Weight: Axial

15 points

Strength to Weight: Bending

16 points

Thermal Shock Resistance

16 points

Alloy Composition

Nickel (Ni) 79.1 to 84.8
Chromium (Cr) 6.0 to 8.0
Silicon (Si) 4.0 to 5.0
Boron (B) 2.8 to 3.5
Iron (Fe) 2.5 to 3.5
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