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AWS BNi-5 vs. AWS BNi-1a

Both AWS BNi-5 and AWS BNi-1a are nickel alloys. Both are furnished in the as-fabricated (no temper or treatment) condition. They have 89% of their average alloy composition in common.

For each property being compared, the top bar is AWS BNi-5 and the bottom bar is AWS BNi-1a.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
180
Poisson's Ratio 0.29
0.3
Shear Modulus, GPa 72
70
Tensile Strength: Ultimate (UTS), MPa 470
450

Thermal Properties

Brazing Temperature, °C 1150 to 1200
1080 to 1200
Latent Heat of Fusion, J/g 470
370
Melting Completion (Liquidus), °C 1140
1080
Melting Onset (Solidus), °C 1080
980
Specific Heat Capacity, J/kg-K 510
500
Thermal Expansion, µm/m-K 12
12

Otherwise Unclassified Properties

Base Metal Price, % relative 55
55
Density, g/cm3 7.7
8.0
Embodied Carbon, kg CO2/kg material 8.9
8.8
Embodied Energy, MJ/kg 130
120
Embodied Water, L/kg 260
240

Common Calculations

Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 25
24
Strength to Weight: Axial, points 17
16
Strength to Weight: Bending, points 17
16
Thermal Shock Resistance, points 15
15

Alloy Composition


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Aluminum (Al), % 0 to 0.050
0 to 0.050
Boron (B), % 0 to 0.030
2.8 to 3.5
Carbon (C), % 0 to 0.060
0 to 0.060
Chromium (Cr), % 18.5 to 19.5
13 to 15
Cobalt (Co), % 0 to 0.1
0 to 0.1
Iron (Fe), % 0
4.0 to 5.0
Nickel (Ni), % 69.1 to 71.8
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), % 9.8 to 10.5
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 to 0.5
0 to 0.5