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AWS BNi-4 vs. S31730 Stainless Steel

AWS BNi-4 belongs to the nickel alloys classification, while S31730 stainless steel belongs to the iron alloys. There are 19 material properties with values for both materials. Properties with values for just one material (12, in this case) are not shown.

For each property being compared, the top bar is AWS BNi-4 and the bottom bar is S31730 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
77
Tensile Strength: Ultimate (UTS), MPa 430
540

Thermal Properties

Latent Heat of Fusion, J/g 340
290
Melting Completion (Liquidus), °C 1070
1430
Melting Onset (Solidus), °C 980
1390
Specific Heat Capacity, J/kg-K 470
470
Thermal Expansion, µm/m-K 11
16

Otherwise Unclassified Properties

Base Metal Price, % relative 60
24
Density, g/cm3 8.5
8.0
Embodied Carbon, kg CO2/kg material 10
4.6
Embodied Energy, MJ/kg 140
63
Embodied Water, L/kg 220
180

Common Calculations

Stiffness to Weight: Axial, points 12
14
Stiffness to Weight: Bending, points 22
24
Strength to Weight: Axial, points 14
19
Strength to Weight: Bending, points 15
18
Thermal Shock Resistance, points 16
12

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 0.030
Chromium (Cr), % 0
17 to 19
Cobalt (Co), % 0 to 0.1
0
Copper (Cu), % 0
4.0 to 5.0
Iron (Fe), % 0 to 1.5
52.4 to 61
Manganese (Mn), % 0
0 to 2.0
Molybdenum (Mo), % 0
3.0 to 4.0
Nickel (Ni), % 91.4 to 95.5
15 to 16.5
Nitrogen (N), % 0
0 to 0.045
Phosphorus (P), % 0 to 0.020
0 to 0.040
Selenium (Se), % 0 to 0.0050
0
Silicon (Si), % 3.0 to 4.0
0 to 1.0
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