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R31539 Cobalt vs. ASTM A182 Grade F22V

R31539 cobalt belongs to the cobalt alloys classification, while ASTM A182 grade F22V belongs to the iron alloys. There are 28 material properties with values for both materials. Properties with values for just one material (6, in this case) are not shown.

For each property being compared, the top bar is R31539 cobalt and the bottom bar is ASTM A182 grade F22V.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 220
190
Elongation at Break, % 13 to 22
21
Fatigue Strength, MPa 310 to 480
320
Poisson's Ratio 0.29
0.29
Reduction in Area, % 13 to 23
50
Shear Modulus, GPa 86
74
Tensile Strength: Ultimate (UTS), MPa 1000 to 1340
670
Tensile Strength: Yield (Proof), MPa 590 to 940
460

Thermal Properties

Latent Heat of Fusion, J/g 320
250
Melting Completion (Liquidus), °C 1360
1470
Melting Onset (Solidus), °C 1290
1430
Specific Heat Capacity, J/kg-K 450
470
Thermal Conductivity, W/m-K 13
39
Thermal Expansion, µm/m-K 13
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.0
7.6
Electrical Conductivity: Equal Weight (Specific), % IACS 2.1
8.7

Otherwise Unclassified Properties

Density, g/cm3 8.4
7.9
Embodied Carbon, kg CO2/kg material 8.2
2.5
Embodied Energy, MJ/kg 110
35
Embodied Water, L/kg 530
61

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 140 to 190
120
Resilience: Unit (Modulus of Resilience), kJ/m3 780 to 2000
570
Stiffness to Weight: Axial, points 15
13
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 33 to 44
24
Strength to Weight: Bending, points 27 to 32
22
Thermal Diffusivity, mm2/s 3.5
11
Thermal Shock Resistance, points 24 to 32
19

Alloy Composition

Aluminum (Al), % 0.3 to 1.0
0
Boron (B), % 0
0 to 0.0020
Calcium (Ca), % 0
0 to 0.015
Carbon (C), % 0 to 0.14
0.11 to 0.15
Chromium (Cr), % 26 to 30
2.0 to 2.5
Cobalt (Co), % 57.7 to 68.7
0
Copper (Cu), % 0
0 to 0.2
Iron (Fe), % 0 to 0.75
94.6 to 96.4
Lanthanum (La), % 0.030 to 0.2
0
Manganese (Mn), % 0 to 1.0
0.3 to 0.6
Molybdenum (Mo), % 5.0 to 7.0
0.9 to 1.1
Nickel (Ni), % 0 to 1.0
0 to 0.25
Niobium (Nb), % 0
0 to 0.070
Nitrogen (N), % 0 to 0.25
0
Phosphorus (P), % 0
0 to 0.015
Silicon (Si), % 0 to 1.0
0 to 0.1
Sulfur (S), % 0
0 to 0.010
Titanium (Ti), % 0
0 to 0.030
Vanadium (V), % 0
0.25 to 0.35