AWS BNi-8 vs. AWS BNi-5a
Both AWS BNi-8 and AWS BNi-5a 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-8 and the bottom bar is AWS BNi-5a.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 180 | |
| 190 |
| Poisson's Ratio | 0.32 | |
| 0.29 |
| Shear Modulus, GPa | 67 | |
| 72 |
| Tensile Strength: Ultimate (UTS), MPa | 570 | |
| 480 |
Thermal Properties
| Brazing Temperature, °C | 1010 to 1090 | |
| 1150 to 1200 |
| Latent Heat of Fusion, J/g | 390 | |
| 420 |
| Melting Completion (Liquidus), °C | 1010 | |
| 1150 |
| Melting Onset (Solidus), °C | 980 | |
| 1070 |
| Specific Heat Capacity, J/kg-K | 480 | |
| 500 |
| Thermal Expansion, µm/m-K | 13 | |
| 12 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 46 | |
| 55 |
| Density, g/cm3 | 7.9 | |
| 7.9 |
| Embodied Carbon, kg CO2/kg material | 8.2 | |
| 9.0 |
| Embodied Energy, MJ/kg | 120 | |
| 130 |
| Embodied Water, L/kg | 220 | |
| 260 |
Common Calculations
| Stiffness to Weight: Axial, points | 12 | |
| 13 |
| Stiffness to Weight: Bending, points | 24 | |
| 24 |
| Strength to Weight: Axial, points | 20 | |
| 17 |
| Strength to Weight: Bending, points | 19 | |
| 17 |
| Thermal Shock Resistance, points | 17 | |
| 15 |
Alloy Composition
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| Aluminum (Al), % | 0 to 0.050 | |
| 0 to 0.050 |
| Boron (B), % | 0 | |
| 1.0 to 1.5 |
| Carbon (C), % | 0 to 0.060 | |
| 0 to 0.1 |
| Chromium (Cr), % | 0 | |
| 18.5 to 19.5 |
| Cobalt (Co), % | 0 to 0.1 | |
| 0 to 0.1 |
| Copper (Cu), % | 4.0 to 5.0 | |
| 0 |
| Iron (Fe), % | 0 | |
| 0 to 0.5 |
| Manganese (Mn), % | 21.5 to 24.5 | |
| 0 |
| Nickel (Ni), % | 61.6 to 68.5 | |
| 70.1 to 73.5 |
| Phosphorus (P), % | 0 to 0.020 | |
| 0 to 0.020 |
| Selenium (Se), % | 0 to 0.0050 | |
| 0 to 0.0050 |
| Silicon (Si), % | 6.0 to 8.0 | |
| 7.0 to 7.5 |
| 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 |