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AWS BCo-1 vs. S20432 Stainless Steel

AWS BCo-1 belongs to the cobalt alloys classification, while S20432 stainless steel belongs to the iron alloys. They have a modest 24% of their average alloy composition in common, which, by itself, doesn't mean much. There are 18 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 BCo-1 and the bottom bar is S20432 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
200
Poisson's Ratio 0.3
0.28
Shear Modulus, GPa 78
76
Tensile Strength: Ultimate (UTS), MPa 700
580

Thermal Properties

Latent Heat of Fusion, J/g 420
280
Melting Completion (Liquidus), °C 1150
1410
Melting Onset (Solidus), °C 1120
1370
Specific Heat Capacity, J/kg-K 480
480
Thermal Expansion, µm/m-K 12
17

Otherwise Unclassified Properties

Density, g/cm3 8.1
7.8
Embodied Carbon, kg CO2/kg material 8.0
2.7
Embodied Energy, MJ/kg 110
38
Embodied Water, L/kg 430
140

Common Calculations

Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 24
25
Strength to Weight: Axial, points 24
21
Strength to Weight: Bending, points 22
20
Thermal Shock Resistance, points 21
13

Alloy Composition

Aluminum (Al), % 0 to 0.050
0
Boron (B), % 0.7 to 0.9
0
Carbon (C), % 0.35 to 0.45
0 to 0.080
Chromium (Cr), % 18 to 20
17 to 18
Cobalt (Co), % 46 to 54
0
Copper (Cu), % 0
2.0 to 3.0
Iron (Fe), % 0 to 1.0
66.7 to 74
Manganese (Mn), % 0
3.0 to 5.0
Nickel (Ni), % 16 to 18
4.0 to 6.0
Nitrogen (N), % 0
0.050 to 0.2
Phosphorus (P), % 0 to 0.020
0 to 0.045
Selenium (Se), % 0 to 0.0050
0
Silicon (Si), % 7.5 to 8.5
0 to 1.0
Sulfur (S), % 0 to 0.020
0 to 0.030
Titanium (Ti), % 0 to 0.050
0
Tungsten (W), % 3.5 to 4.5
0
Zirconium (Zr), % 0 to 0.050
0
Residuals, % 0 to 0.5
0