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R30155 Cobalt vs. ACI-ASTM CF16F Steel

Both R30155 cobalt and ACI-ASTM CF16F steel are iron alloys. They have 62% of their average alloy composition in common. There are 30 material properties with values for both materials. Properties with values for just one material (4, in this case) are not shown.

For each property being compared, the top bar is R30155 cobalt and the bottom bar is ACI-ASTM CF16F steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 220
150
Elastic (Young's, Tensile) Modulus, GPa 210
200
Elongation at Break, % 34
50
Fatigue Strength, MPa 310
270
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 81
77
Tensile Strength: Ultimate (UTS), MPa 850
530
Tensile Strength: Yield (Proof), MPa 390
280

Thermal Properties

Latent Heat of Fusion, J/g 300
300
Maximum Temperature: Corrosion, °C 570
420
Maximum Temperature: Mechanical, °C 1100
980
Melting Completion (Liquidus), °C 1470
1420
Melting Onset (Solidus), °C 1420
1400
Specific Heat Capacity, J/kg-K 450
480
Thermal Conductivity, W/m-K 12
16
Thermal Expansion, µm/m-K 14
16

Otherwise Unclassified Properties

Base Metal Price, % relative 80
18
Density, g/cm3 8.5
7.8
Embodied Carbon, kg CO2/kg material 9.7
3.4
Embodied Energy, MJ/kg 150
47
Embodied Water, L/kg 300
150

Common Calculations

PREN (Pitting Resistance) 37
22
Resilience: Ultimate (Unit Rupture Work), MJ/m3 230
220
Resilience: Unit (Modulus of Resilience), kJ/m3 370
190
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 23
25
Strength to Weight: Axial, points 28
19
Strength to Weight: Bending, points 24
19
Thermal Diffusivity, mm2/s 3.2
4.3
Thermal Shock Resistance, points 21
12

Alloy Composition

Carbon (C), % 0.080 to 0.16
0 to 0.16
Chromium (Cr), % 20 to 22.5
18 to 21
Cobalt (Co), % 18.5 to 21
0
Iron (Fe), % 24.3 to 36.2
61.3 to 72.8
Manganese (Mn), % 1.0 to 2.0
0 to 1.5
Molybdenum (Mo), % 2.5 to 3.5
0 to 1.5
Nickel (Ni), % 19 to 21
9.0 to 12
Niobium (Nb), % 0.75 to 1.3
0
Nitrogen (N), % 0 to 0.2
0
Phosphorus (P), % 0 to 0.040
0 to 0.17
Selenium (Se), % 0
0.2 to 0.35
Silicon (Si), % 0 to 1.0
0 to 2.0
Sulfur (S), % 0 to 0.030
0 to 0.040
Tantalum (Ta), % 0.75 to 1.3
0
Tungsten (W), % 2.0 to 3.0
0