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AWS BNi-7 vs. S39277 Stainless Steel

AWS BNi-7 belongs to the nickel alloys classification, while S39277 stainless steel belongs to the iron alloys. They have a modest 21% of their average alloy composition in common, which, by itself, doesn't mean much. There are 19 material properties with values for both materials. Properties with values for just one material (16, in this case) are not shown.

For each property being compared, the top bar is AWS BNi-7 and the bottom bar is S39277 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 170
200
Poisson's Ratio 0.3
0.27
Shear Modulus, GPa 67
80
Tensile Strength: Ultimate (UTS), MPa 550
930

Thermal Properties

Latent Heat of Fusion, J/g 280
300
Melting Completion (Liquidus), °C 890
1460
Melting Onset (Solidus), °C 890
1410
Specific Heat Capacity, J/kg-K 490
470
Thermal Expansion, µm/m-K 11
13

Otherwise Unclassified Properties

Base Metal Price, % relative 55
23
Density, g/cm3 8.0
7.9
Embodied Carbon, kg CO2/kg material 8.8
4.2
Embodied Energy, MJ/kg 120
59
Embodied Water, L/kg 240
180

Common Calculations

Stiffness to Weight: Axial, points 12
14
Stiffness to Weight: Bending, points 23
25
Strength to Weight: Axial, points 19
33
Strength to Weight: Bending, points 19
27
Thermal Shock Resistance, points 21
26

Alloy Composition

Aluminum (Al), % 0 to 0.050
0
Boron (B), % 0 to 0.010
0
Carbon (C), % 0 to 0.060
0 to 0.025
Chromium (Cr), % 13 to 15
24 to 26
Cobalt (Co), % 0 to 0.1
0
Copper (Cu), % 0
1.2 to 2.0
Iron (Fe), % 0 to 0.2
56.8 to 64.3
Manganese (Mn), % 0 to 0.040
0 to 0.8
Molybdenum (Mo), % 0
3.0 to 4.0
Nickel (Ni), % 73.3 to 77.3
6.5 to 8.0
Nitrogen (N), % 0
0.23 to 0.33
Phosphorus (P), % 9.7 to 10.5
0 to 0.025
Selenium (Se), % 0 to 0.0050
0
Silicon (Si), % 0 to 0.1
0 to 0.8
Sulfur (S), % 0 to 0.020
0 to 0.0020
Titanium (Ti), % 0 to 0.050
0
Tungsten (W), % 0
0.8 to 1.2
Zirconium (Zr), % 0 to 0.050
0
Residuals, % 0 to 0.5
0