AWS BNi-1 vs. AWS BNi-1a
Both AWS BNi-1 and AWS BNi-1a are nickel alloys. Both are furnished in the as-fabricated (no temper or treatment) condition. Their average alloy composition is basically identical.
For each property being compared, the top bar is AWS BNi-1 and the bottom bar is AWS BNi-1a.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 180 | |
| 180 |
| Poisson's Ratio | 0.3 | |
| 0.3 |
| Shear Modulus, GPa | 70 | |
| 70 |
| Tensile Strength: Ultimate (UTS), MPa | 450 | |
| 450 |
Thermal Properties
| Brazing Temperature, °C | 1070 to 1200 | |
| 1080 to 1200 |
| Latent Heat of Fusion, J/g | 360 | |
| 370 |
| Melting Completion (Liquidus), °C | 1040 | |
| 1080 |
| Melting Onset (Solidus), °C | 980 | |
| 980 |
| Specific Heat Capacity, J/kg-K | 500 | |
| 500 |
| Thermal Expansion, µm/m-K | 12 | |
| 12 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 55 | |
| 55 |
| Density, g/cm3 | 8.0 | |
| 8.0 |
| Embodied Carbon, kg CO2/kg material | 8.8 | |
| 8.8 |
| Embodied Energy, MJ/kg | 120 | |
| 120 |
| Embodied Water, L/kg | 240 | |
| 240 |
Common Calculations
| Stiffness to Weight: Axial, points | 13 | |
| 13 |
| Stiffness to Weight: Bending, points | 24 | |
| 24 |
| Strength to Weight: Axial, points | 16 | |
| 16 |
| Strength to Weight: Bending, points | 16 | |
| 16 |
| Thermal Shock Resistance, points | 15 | |
| 15 |
Alloy Composition
| Aluminum (Al), % | 0 to 0.050 | |
| 0 to 0.050 |
| Boron (B), % | 2.8 to 3.5 | |
| 2.8 to 3.5 |
| Carbon (C), % | 0.6 to 0.9 | |
| 0 to 0.060 |
| Chromium (Cr), % | 13 to 15 | |
| 13 to 15 |
| Cobalt (Co), % | 0 to 0.1 | |
| 0 to 0.1 |
| Iron (Fe), % | 4.0 to 5.0 | |
| 4.0 to 5.0 |
| Nickel (Ni), % | 69.8 to 75.7 | |
| 70.6 to 76.3 |
| Phosphorus (P), % | 0 to 0.020 | |
| 0 to 0.020 |
| Selenium (Se), % | 0 to 0.0050 | |
| 0 to 0.0050 |
| Silicon (Si), % | 4.0 to 5.0 | |
| 4.0 to 5.0 |
| Sulfur (S), % | 0 to 0.020 | |
| 0 to 0.020 |
| Titanium (Ti), % | 0 to 0.050 | |
| 0 to 0.050 |
| Zirconium (Zr), % | 0 to 0.050 | |
| 0 to 0.050 |
| Residuals, % | 0 | |
| 0 to 0.5 |