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ACI-ASTM CF10SMnN Steel vs. R31539 Cobalt

ACI-ASTM CF10SMnN steel belongs to the iron alloys classification, while R31539 cobalt belongs to the cobalt alloys. There are 23 material properties with values for both materials. Properties with values for just one material (11, in this case) are not shown.

For each property being compared, the top bar is ACI-ASTM CF10SMnN steel and the bottom bar is R31539 cobalt.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
220
Elongation at Break, % 34
13 to 22
Fatigue Strength, MPa 260
310 to 480
Poisson's Ratio 0.28
0.29
Shear Modulus, GPa 75
86
Tensile Strength: Ultimate (UTS), MPa 660
1000 to 1340
Tensile Strength: Yield (Proof), MPa 330
590 to 940

Thermal Properties

Latent Heat of Fusion, J/g 340
320
Melting Completion (Liquidus), °C 1360
1360
Melting Onset (Solidus), °C 1310
1290
Specific Heat Capacity, J/kg-K 500
450
Thermal Expansion, µm/m-K 16
13

Otherwise Unclassified Properties

Density, g/cm3 7.5
8.4
Embodied Carbon, kg CO2/kg material 3.1
8.2
Embodied Energy, MJ/kg 45
110
Embodied Water, L/kg 150
530

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 180
140 to 190
Resilience: Unit (Modulus of Resilience), kJ/m3 280
780 to 2000
Stiffness to Weight: Axial, points 14
15
Stiffness to Weight: Bending, points 26
24
Strength to Weight: Axial, points 24
33 to 44
Strength to Weight: Bending, points 22
27 to 32
Thermal Shock Resistance, points 15
24 to 32

Alloy Composition

Aluminum (Al), % 0
0.3 to 1.0
Carbon (C), % 0 to 0.1
0 to 0.14
Chromium (Cr), % 16 to 18
26 to 30
Cobalt (Co), % 0
57.7 to 68.7
Iron (Fe), % 59.1 to 65.4
0 to 0.75
Lanthanum (La), % 0
0.030 to 0.2
Manganese (Mn), % 7.0 to 9.0
0 to 1.0
Molybdenum (Mo), % 0
5.0 to 7.0
Nickel (Ni), % 8.0 to 9.0
0 to 1.0
Nitrogen (N), % 0.080 to 0.18
0 to 0.25
Phosphorus (P), % 0 to 0.060
0
Silicon (Si), % 3.5 to 4.5
0 to 1.0
Sulfur (S), % 0 to 0.030
0