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AWS BNi-4 vs. S31254 Stainless Steel

AWS BNi-4 belongs to the nickel alloys classification, while S31254 stainless steel belongs to the iron alloys. There are 19 material properties with values for both materials. Properties with values for just one material (17, in this case) are not shown.

For each property being compared, the top bar is AWS BNi-4 and the bottom bar is S31254 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 180
200
Poisson's Ratio 0.31
0.28
Shear Modulus, GPa 67
80
Tensile Strength: Ultimate (UTS), MPa 430
720

Thermal Properties

Latent Heat of Fusion, J/g 340
300
Melting Completion (Liquidus), °C 1070
1460
Melting Onset (Solidus), °C 980
1420
Specific Heat Capacity, J/kg-K 470
460
Thermal Expansion, µm/m-K 11
17

Otherwise Unclassified Properties

Base Metal Price, % relative 60
28
Density, g/cm3 8.5
8.0
Embodied Carbon, kg CO2/kg material 10
5.5
Embodied Energy, MJ/kg 140
74
Embodied Water, L/kg 220
190

Common Calculations

Stiffness to Weight: Axial, points 12
14
Stiffness to Weight: Bending, points 22
24
Strength to Weight: Axial, points 14
25
Strength to Weight: Bending, points 15
22
Thermal Shock Resistance, points 16
15

Alloy Composition

Aluminum (Al), % 0 to 0.050
0
Boron (B), % 1.5 to 2.2
0
Carbon (C), % 0 to 0.060
0 to 0.020
Chromium (Cr), % 0
19.5 to 20.5
Cobalt (Co), % 0 to 0.1
0
Copper (Cu), % 0
0.5 to 1.0
Iron (Fe), % 0 to 1.5
51.4 to 56.3
Manganese (Mn), % 0
0 to 1.0
Molybdenum (Mo), % 0
6.0 to 6.5
Nickel (Ni), % 91.4 to 95.5
17.5 to 18.5
Nitrogen (N), % 0
0.18 to 0.22
Phosphorus (P), % 0 to 0.020
0 to 0.030
Selenium (Se), % 0 to 0.0050
0
Silicon (Si), % 3.0 to 4.0
0 to 0.8
Sulfur (S), % 0 to 0.020
0 to 0.010
Titanium (Ti), % 0 to 0.050
0
Zirconium (Zr), % 0 to 0.050
0
Residuals, % 0 to 0.5
0