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ACI-ASTM CF3MN Steel vs. AWS BCo-1

ACI-ASTM CF3MN steel belongs to the iron alloys classification, while AWS BCo-1 belongs to the cobalt alloys. They have a modest 31% 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 (15, in this case) are not shown.

For each property being compared, the top bar is ACI-ASTM CF3MN 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 0.28
0.3
Shear Modulus, GPa 78
78
Tensile Strength: Ultimate (UTS), MPa 580
700

Thermal Properties

Latent Heat of Fusion, J/g 300
420
Melting Completion (Liquidus), °C 1440
1150
Melting Onset (Solidus), °C 1390
1120
Specific Heat Capacity, J/kg-K 480
480
Thermal Expansion, µm/m-K 16
12

Otherwise Unclassified Properties

Density, g/cm3 7.8
8.1
Embodied Carbon, kg CO2/kg material 3.9
8.0
Embodied Energy, MJ/kg 53
110
Embodied Water, L/kg 160
430

Common Calculations

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

Alloy Composition


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Aluminum (Al), % 0
0 to 0.050
Boron (B), % 0
0.7 to 0.9
Carbon (C), % 0 to 0.030
0.35 to 0.45
Chromium (Cr), % 17 to 22
18 to 20
Cobalt (Co), % 0
46 to 54
Iron (Fe), % 58.7 to 71.9
0 to 1.0
Manganese (Mn), % 0 to 1.5
0
Molybdenum (Mo), % 2.0 to 3.0
0
Nickel (Ni), % 9.0 to 13
16 to 18
Nitrogen (N), % 0.1 to 0.2
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