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AWS BNi-3 vs. AWS BNi-7

Both AWS BNi-3 and AWS BNi-7 are nickel alloys. Both are furnished in the as-fabricated (no temper or treatment) condition. They have 76% of their average alloy composition in common.

For each property being compared, the top bar is AWS BNi-3 and the bottom bar is AWS BNi-7.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 170
170
Poisson's Ratio 0.31
0.3
Shear Modulus, GPa 66
67
Tensile Strength: Ultimate (UTS), MPa 430
550

Thermal Properties

Brazing Temperature, °C 1010 to 1180
930 to 1090
Latent Heat of Fusion, J/g 350
280
Melting Completion (Liquidus), °C 1040
890
Melting Onset (Solidus), °C 980
890
Specific Heat Capacity, J/kg-K 480
490
Thermal Expansion, µm/m-K 10
11

Otherwise Unclassified Properties

Base Metal Price, % relative 60
55
Density, g/cm3 8.3
8.0
Embodied Carbon, kg CO2/kg material 9.9
8.8
Embodied Energy, MJ/kg 140
120
Embodied Water, L/kg 220
240

Common Calculations

Stiffness to Weight: Axial, points 12
12
Stiffness to Weight: Bending, points 22
23
Strength to Weight: Axial, points 14
19
Strength to Weight: Bending, points 15
19
Thermal Shock Resistance, points 17
21

Alloy Composition

Aluminum (Al), % 0 to 0.050
0 to 0.050
Boron (B), % 2.8 to 3.5
0 to 0.010
Carbon (C), % 0 to 0.060
0 to 0.060
Chromium (Cr), % 0
13 to 15
Cobalt (Co), % 0 to 0.1
0 to 0.1
Iron (Fe), % 0 to 0.5
0 to 0.2
Manganese (Mn), % 0
0 to 0.040
Nickel (Ni), % 90.1 to 93.3
73.3 to 77.3
Phosphorus (P), % 0 to 0.020
9.7 to 10.5
Selenium (Se), % 0 to 0.0050
0 to 0.0050
Silicon (Si), % 4.0 to 5.0
0 to 0.1
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