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AWS BNi-7 vs. S32750 Stainless Steel

AWS BNi-7 belongs to the nickel alloys classification, while S32750 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 S32750 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 170
210
Poisson's Ratio 0.3
0.27
Shear Modulus, GPa 67
81
Tensile Strength: Ultimate (UTS), MPa 550
860

Thermal Properties

Latent Heat of Fusion, J/g 280
300
Melting Completion (Liquidus), °C 890
1450
Melting Onset (Solidus), °C 890
1400
Specific Heat Capacity, J/kg-K 490
480
Thermal Expansion, µm/m-K 11
12

Otherwise Unclassified Properties

Base Metal Price, % relative 55
21
Density, g/cm3 8.0
7.8
Embodied Carbon, kg CO2/kg material 8.8
4.1
Embodied Energy, MJ/kg 120
56
Embodied Water, L/kg 240
180

Common Calculations

Stiffness to Weight: Axial, points 12
15
Stiffness to Weight: Bending, points 23
25
Strength to Weight: Axial, points 19
31
Strength to Weight: Bending, points 19
26
Thermal Shock Resistance, points 21
25

Alloy Composition

Aluminum (Al), % 0 to 0.050
0
Boron (B), % 0 to 0.010
0
Carbon (C), % 0 to 0.060
0 to 0.030
Chromium (Cr), % 13 to 15
24 to 26
Cobalt (Co), % 0 to 0.1
0
Copper (Cu), % 0
0 to 0.5
Iron (Fe), % 0 to 0.2
58.1 to 66.8
Manganese (Mn), % 0 to 0.040
0 to 1.2
Molybdenum (Mo), % 0
3.0 to 5.0
Nickel (Ni), % 73.3 to 77.3
6.0 to 8.0
Nitrogen (N), % 0
0.24 to 0.32
Phosphorus (P), % 9.7 to 10.5
0 to 0.035
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 0.020
Titanium (Ti), % 0 to 0.050
0
Zirconium (Zr), % 0 to 0.050
0
Residuals, % 0 to 0.5
0