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
| Ni | 79.1 to 84.8 | |
| Cr | 6.0 to 8.0 | |
| Si | 4.0 to 5.0 | |
| B | 2.8 to 3.5 | |
| Fe | 2.5 to 3.5 | |
| Co | 0 to 0.1 | |
| C | 0 to 0.060 | |
| Al | 0 to 0.050 | |
| Ti | 0 to 0.050 | |
| Zr | 0 to 0.050 | |
| P | 0 to 0.020 | |
| S | 0 to 0.020 | |
| Se | 0 to 0.0050 | |
| res. | 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