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ACI-ASTM CE8MN Steel vs. AWS BCo-1

ACI-ASTM CE8MN steel belongs to the iron alloys classification, while AWS BCo-1 belongs to the cobalt alloys. They have a modest 30% 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 (14, in this case) are not shown.

For each property being compared, the top bar is ACI-ASTM CE8MN steel and the bottom bar is AWS BCo-1.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
200
Poisson's Ratio 0.27
0.3
Shear Modulus, GPa 80
78
Tensile Strength: Ultimate (UTS), MPa 750
700

Thermal Properties

Latent Heat of Fusion, J/g 300
420
Melting Completion (Liquidus), °C 1440
1150
Melting Onset (Solidus), °C 1400
1120
Specific Heat Capacity, J/kg-K 480
480
Thermal Expansion, µm/m-K 13
12

Otherwise Unclassified Properties

Density, g/cm3 7.8
8.1
Embodied Carbon, kg CO2/kg material 4.2
8.0
Embodied Energy, MJ/kg 58
110
Embodied Water, L/kg 180
430

Common Calculations

Stiffness to Weight: Axial, points 15
14
Stiffness to Weight: Bending, points 25
24
Strength to Weight: Axial, points 27
24
Strength to Weight: Bending, points 23
22
Thermal Shock Resistance, points 21
21

Alloy Composition

Aluminum (Al), % 0
0 to 0.050
Boron (B), % 0
0.7 to 0.9
Carbon (C), % 0 to 0.080
0.35 to 0.45
Chromium (Cr), % 22.5 to 25.5
18 to 20
Cobalt (Co), % 0
46 to 54
Iron (Fe), % 56 to 66.4
0 to 1.0
Manganese (Mn), % 0 to 1.0
0
Molybdenum (Mo), % 3.0 to 4.5
0
Nickel (Ni), % 8.0 to 11
16 to 18
Nitrogen (N), % 0.1 to 0.3
0
Phosphorus (P), % 0 to 0.040
0 to 0.020
Selenium (Se), % 0
0 to 0.0050
Silicon (Si), % 0 to 1.5
7.5 to 8.5
Sulfur (S), % 0 to 0.040
0 to 0.020
Titanium (Ti), % 0
0 to 0.050
Tungsten (W), % 0
3.5 to 4.5
Zirconium (Zr), % 0
0 to 0.050
Residuals, % 0
0 to 0.5