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ASTM A182 Grade F122 vs. R31539 Cobalt

ASTM A182 grade F122 belongs to the iron alloys classification, while R31539 cobalt belongs to the cobalt 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 ASTM A182 grade F122 and the bottom bar is R31539 cobalt.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
220
Elongation at Break, % 23
13 to 22
Fatigue Strength, MPa 320
310 to 480
Poisson's Ratio 0.28
0.29
Reduction in Area, % 45
13 to 23
Shear Modulus, GPa 76
86
Tensile Strength: Ultimate (UTS), MPa 710
1000 to 1340
Tensile Strength: Yield (Proof), MPa 450
590 to 940

Thermal Properties

Latent Heat of Fusion, J/g 270
320
Melting Completion (Liquidus), °C 1490
1360
Melting Onset (Solidus), °C 1440
1290
Specific Heat Capacity, J/kg-K 470
450
Thermal Conductivity, W/m-K 24
13
Thermal Expansion, µm/m-K 13
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 10
2.0
Electrical Conductivity: Equal Weight (Specific), % IACS 12
2.1

Otherwise Unclassified Properties

Density, g/cm3 8.0
8.4
Embodied Carbon, kg CO2/kg material 3.0
8.2
Embodied Energy, MJ/kg 44
110
Embodied Water, L/kg 100
530

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 140
140 to 190
Resilience: Unit (Modulus of Resilience), kJ/m3 520
780 to 2000
Stiffness to Weight: Axial, points 14
15
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 25
33 to 44
Strength to Weight: Bending, points 22
27 to 32
Thermal Diffusivity, mm2/s 6.4
3.5
Thermal Shock Resistance, points 19
24 to 32

Alloy Composition

Aluminum (Al), % 0 to 0.020
0.3 to 1.0
Boron (B), % 0 to 0.0050
0
Carbon (C), % 0.070 to 0.14
0 to 0.14
Chromium (Cr), % 10 to 11.5
26 to 30
Cobalt (Co), % 0
57.7 to 68.7
Copper (Cu), % 0.3 to 1.7
0
Iron (Fe), % 81.3 to 87.7
0 to 0.75
Lanthanum (La), % 0
0.030 to 0.2
Manganese (Mn), % 0 to 0.7
0 to 1.0
Molybdenum (Mo), % 0.25 to 0.6
5.0 to 7.0
Nickel (Ni), % 0 to 0.5
0 to 1.0
Niobium (Nb), % 0.040 to 0.1
0
Nitrogen (N), % 0.040 to 0.1
0 to 0.25
Phosphorus (P), % 0 to 0.020
0
Silicon (Si), % 0 to 0.5
0 to 1.0
Sulfur (S), % 0 to 0.010
0
Titanium (Ti), % 0 to 0.010
0
Tungsten (W), % 1.5 to 2.5
0
Vanadium (V), % 0.15 to 0.3
0
Zirconium (Zr), % 0 to 0.010
0