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R30605 Cobalt vs. ASTM A369 Grade FP91

R30605 cobalt belongs to the cobalt alloys classification, while ASTM A369 grade FP91 belongs to the iron alloys. There are 25 material properties with values for both materials. Properties with values for just one material (7, in this case) are not shown.

For each property being compared, the top bar is R30605 cobalt and the bottom bar is ASTM A369 grade FP91.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 210
190
Elongation at Break, % 34
19
Fatigue Strength, MPa 260 to 590
320
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 81
75
Tensile Strength: Ultimate (UTS), MPa 1130 to 1900
670
Tensile Strength: Yield (Proof), MPa 470 to 1600
460

Thermal Properties

Latent Heat of Fusion, J/g 290
270
Melting Completion (Liquidus), °C 1410
1460
Melting Onset (Solidus), °C 1330
1420
Specific Heat Capacity, J/kg-K 410
470
Thermal Conductivity, W/m-K 9.6
26
Thermal Expansion, µm/m-K 12
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.0
8.9
Electrical Conductivity: Equal Weight (Specific), % IACS 1.8
10

Otherwise Unclassified Properties

Density, g/cm3 9.6
7.8
Embodied Carbon, kg CO2/kg material 9.8
2.6
Embodied Energy, MJ/kg 140
37
Embodied Water, L/kg 450
88

Common Calculations

Stiffness to Weight: Axial, points 12
14
Stiffness to Weight: Bending, points 21
25
Strength to Weight: Axial, points 33 to 55
24
Strength to Weight: Bending, points 25 to 36
22
Thermal Diffusivity, mm2/s 2.5
6.9
Thermal Shock Resistance, points 31 to 52
18

Alloy Composition

Aluminum (Al), % 0
0 to 0.020
Carbon (C), % 0.050 to 0.15
0.080 to 0.12
Chromium (Cr), % 19 to 21
8.0 to 9.5
Cobalt (Co), % 46.4 to 57
0
Iron (Fe), % 0 to 3.0
87.3 to 90.3
Manganese (Mn), % 1.0 to 2.0
0.3 to 0.6
Molybdenum (Mo), % 0
0.85 to 1.1
Nickel (Ni), % 9.0 to 11
0 to 0.4
Niobium (Nb), % 0
0.060 to 0.1
Nitrogen (N), % 0
0.030 to 0.070
Phosphorus (P), % 0 to 0.040
0 to 0.025
Silicon (Si), % 0 to 0.4
0.2 to 0.5
Sulfur (S), % 0 to 0.030
0 to 0.025
Titanium (Ti), % 0
0 to 0.010
Tungsten (W), % 14 to 16
0
Vanadium (V), % 0
0.18 to 0.25
Zirconium (Zr), % 0
0 to 0.010