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AWS BNi-4 vs. S21800 Stainless Steel

AWS BNi-4 belongs to the nickel alloys classification, while S21800 stainless steel belongs to the iron alloys. There are 19 material properties with values for both materials. Properties with values for just one material (13, in this case) are not shown.

For each property being compared, the top bar is AWS BNi-4 and the bottom bar is S21800 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 180
190
Poisson's Ratio 0.31
0.28
Shear Modulus, GPa 67
75
Tensile Strength: Ultimate (UTS), MPa 430
740

Thermal Properties

Latent Heat of Fusion, J/g 340
340
Melting Completion (Liquidus), °C 1070
1360
Melting Onset (Solidus), °C 980
1310
Specific Heat Capacity, J/kg-K 470
500
Thermal Expansion, µm/m-K 11
16

Otherwise Unclassified Properties

Base Metal Price, % relative 60
15
Density, g/cm3 8.5
7.5
Embodied Carbon, kg CO2/kg material 10
3.1
Embodied Energy, MJ/kg 140
45
Embodied Water, L/kg 220
150

Common Calculations

Stiffness to Weight: Axial, points 12
14
Stiffness to Weight: Bending, points 22
26
Strength to Weight: Axial, points 14
27
Strength to Weight: Bending, points 15
24
Thermal Shock Resistance, points 16
17

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 0.1
Chromium (Cr), % 0
16 to 18
Cobalt (Co), % 0 to 0.1
0
Iron (Fe), % 0 to 1.5
59.1 to 65.4
Manganese (Mn), % 0
7.0 to 9.0
Nickel (Ni), % 91.4 to 95.5
8.0 to 9.0
Nitrogen (N), % 0
0.080 to 0.18
Phosphorus (P), % 0 to 0.020
0 to 0.060
Selenium (Se), % 0 to 0.0050
0
Silicon (Si), % 3.0 to 4.0
3.5 to 4.5
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