AWS BNi-5a vs. AWS BNi-8
Both AWS BNi-5a and AWS BNi-8 are nickel alloys. Both are furnished in the as-fabricated (no temper or treatment) condition. They have 72% of their average alloy composition in common.
For each property being compared, the top bar is AWS BNi-5a and the bottom bar is AWS BNi-8.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 190 | |
| 180 |
| Poisson's Ratio | 0.29 | |
| 0.32 |
| Shear Modulus, GPa | 72 | |
| 67 |
| Tensile Strength: Ultimate (UTS), MPa | 480 | |
| 570 |
Thermal Properties
| Brazing Temperature, °C | 1150 to 1200 | |
| 1010 to 1090 |
| Latent Heat of Fusion, J/g | 420 | |
| 390 |
| Melting Completion (Liquidus), °C | 1150 | |
| 1010 |
| Melting Onset (Solidus), °C | 1070 | |
| 980 |
| Specific Heat Capacity, J/kg-K | 500 | |
| 480 |
| Thermal Expansion, µm/m-K | 12 | |
| 13 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 55 | |
| 46 |
| Density, g/cm3 | 7.9 | |
| 7.9 |
| Embodied Carbon, kg CO2/kg material | 9.0 | |
| 8.2 |
| Embodied Energy, MJ/kg | 130 | |
| 120 |
| Embodied Water, L/kg | 260 | |
| 220 |
Common Calculations
| Stiffness to Weight: Axial, points | 13 | |
| 12 |
| Stiffness to Weight: Bending, points | 24 | |
| 24 |
| Strength to Weight: Axial, points | 17 | |
| 20 |
| Strength to Weight: Bending, points | 17 | |
| 19 |
| Thermal Shock Resistance, points | 15 | |
| 17 |
Alloy Composition
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| Aluminum (Al), % | 0 to 0.050 | |
| 0 to 0.050 |
| Boron (B), % | 1.0 to 1.5 | |
| 0 |
| Carbon (C), % | 0 to 0.1 | |
| 0 to 0.060 |
| Chromium (Cr), % | 18.5 to 19.5 | |
| 0 |
| Cobalt (Co), % | 0 to 0.1 | |
| 0 to 0.1 |
| Copper (Cu), % | 0 | |
| 4.0 to 5.0 |
| Iron (Fe), % | 0 to 0.5 | |
| 0 |
| Manganese (Mn), % | 0 | |
| 21.5 to 24.5 |
| Nickel (Ni), % | 70.1 to 73.5 | |
| 61.6 to 68.5 |
| Phosphorus (P), % | 0 to 0.020 | |
| 0 to 0.020 |
| Selenium (Se), % | 0 to 0.0050 | |
| 0 to 0.0050 |
| Silicon (Si), % | 7.0 to 7.5 | |
| 6.0 to 8.0 |
| 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 to 0.5 | |
| 0 to 0.5 |