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AWS BNi-4 vs. S21904 Stainless Steel

AWS BNi-4 belongs to the nickel alloys classification, while S21904 stainless steel belongs to the iron alloys. There are 19 material properties with values for both materials. Properties with values for just one material (15, in this case) are not shown.

For each property being compared, the top bar is AWS BNi-4 and the bottom bar is S21904 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
78
Tensile Strength: Ultimate (UTS), MPa 430
700 to 1000

Thermal Properties

Latent Heat of Fusion, J/g 340
290
Melting Completion (Liquidus), °C 1070
1400
Melting Onset (Solidus), °C 980
1350
Specific Heat Capacity, J/kg-K 470
480
Thermal Expansion, µm/m-K 11
17

Otherwise Unclassified Properties

Base Metal Price, % relative 60
15
Density, g/cm3 8.5
7.7
Embodied Carbon, kg CO2/kg material 10
3.0
Embodied Energy, MJ/kg 140
43
Embodied Water, L/kg 220
160

Common Calculations

Stiffness to Weight: Axial, points 12
14
Stiffness to Weight: Bending, points 22
25
Strength to Weight: Axial, points 14
25 to 36
Strength to Weight: Bending, points 15
23 to 29
Thermal Shock Resistance, points 16
15 to 21

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 0.040
Chromium (Cr), % 0
19 to 21.5
Cobalt (Co), % 0 to 0.1
0
Iron (Fe), % 0 to 1.5
59.5 to 67.4
Manganese (Mn), % 0
8.0 to 10
Nickel (Ni), % 91.4 to 95.5
5.5 to 7.5
Nitrogen (N), % 0
0.15 to 0.4
Phosphorus (P), % 0 to 0.020
0 to 0.045
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 0.030
Titanium (Ti), % 0 to 0.050
0
Zirconium (Zr), % 0 to 0.050
0
Residuals, % 0 to 0.5
0