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R30021 Cobalt vs. ASTM A182 Grade F911

R30021 cobalt belongs to the cobalt alloys classification, while ASTM A182 grade F911 belongs to the iron alloys. There are 27 material properties with values for both materials. Properties with values for just one material (8, in this case) are not shown.

For each property being compared, the top bar is R30021 cobalt and the bottom bar is ASTM A182 grade F911.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 220
190
Elongation at Break, % 9.0
20
Fatigue Strength, MPa 250
350
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 86
76
Tensile Strength: Ultimate (UTS), MPa 700
690
Tensile Strength: Yield (Proof), MPa 500
500

Thermal Properties

Latent Heat of Fusion, J/g 330
270
Melting Completion (Liquidus), °C 1350
1480
Melting Onset (Solidus), °C 1190
1440
Specific Heat Capacity, J/kg-K 450
470
Thermal Conductivity, W/m-K 15
26
Thermal Expansion, µm/m-K 11
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 1.9
9.2
Electrical Conductivity: Equal Weight (Specific), % IACS 2.1
10

Otherwise Unclassified Properties

Density, g/cm3 8.4
7.9
Embodied Carbon, kg CO2/kg material 8.0
2.8
Embodied Energy, MJ/kg 110
40
Embodied Water, L/kg 520
90

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 57
130
Resilience: Unit (Modulus of Resilience), kJ/m3 570
650
Stiffness to Weight: Axial, points 15
14
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 23
24
Strength to Weight: Bending, points 21
22
Thermal Diffusivity, mm2/s 3.8
6.9
Thermal Shock Resistance, points 21
19

Alloy Composition

Aluminum (Al), % 0
0 to 0.020
Boron (B), % 0
0.00030 to 0.0060
Carbon (C), % 0.2 to 0.35
0.090 to 0.13
Chromium (Cr), % 26 to 29
8.5 to 9.5
Cobalt (Co), % 61.7 to 67.3
0
Iron (Fe), % 0 to 3.0
86.2 to 88.9
Manganese (Mn), % 0
0.3 to 0.6
Molybdenum (Mo), % 4.5 to 6.0
0.9 to 1.1
Nickel (Ni), % 2.0 to 3.0
0 to 0.4
Niobium (Nb), % 0
0.060 to 0.1
Nitrogen (N), % 0
0.040 to 0.090
Phosphorus (P), % 0
0 to 0.020
Silicon (Si), % 0 to 1.5
0.1 to 0.5
Sulfur (S), % 0
0 to 0.010
Titanium (Ti), % 0
0 to 0.010
Tungsten (W), % 0
0.9 to 1.1
Vanadium (V), % 0
0.18 to 0.25
Zirconium (Zr), % 0
0 to 0.010