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AWS BNi-2 vs. AWS BNi-6

Both AWS BNi-2 and AWS BNi-6 are nickel alloys. Both are furnished in the as-fabricated (no temper or treatment) condition. They have 82% of their average alloy composition in common.

For each property being compared, the top bar is AWS BNi-2 and the bottom bar is AWS BNi-6.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 180
160
Poisson's Ratio 0.3
0.31
Shear Modulus, GPa 68
62
Tensile Strength: Ultimate (UTS), MPa 440
450

Thermal Properties

Brazing Temperature, °C 1010 to 1180
930 to 1090
Latent Heat of Fusion, J/g 360
260
Melting Completion (Liquidus), °C 1000
880
Melting Onset (Solidus), °C 970
880
Specific Heat Capacity, J/kg-K 490
480
Thermal Expansion, µm/m-K 11
9.8

Otherwise Unclassified Properties

Base Metal Price, % relative 55
55
Density, g/cm3 8.2
8.2
Embodied Carbon, kg CO2/kg material 9.3
9.4
Embodied Energy, MJ/kg 130
130
Embodied Water, L/kg 230
210

Common Calculations

Stiffness to Weight: Axial, points 12
11
Stiffness to Weight: Bending, points 23
22
Strength to Weight: Axial, points 15
15
Strength to Weight: Bending, points 16
16
Thermal Shock Resistance, points 16
20

Alloy Composition

Aluminum (Al), % 0 to 0.050
0 to 0.050
Boron (B), % 2.8 to 3.5
0
Carbon (C), % 0 to 0.060
0 to 0.060
Chromium (Cr), % 6.0 to 8.0
0
Cobalt (Co), % 0 to 0.1
0 to 0.1
Iron (Fe), % 2.5 to 3.5
0
Nickel (Ni), % 79.1 to 84.8
87.2 to 90
Phosphorus (P), % 0 to 0.020
10 to 12
Selenium (Se), % 0 to 0.0050
0 to 0.0050
Silicon (Si), % 4.0 to 5.0
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