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R30816 Cobalt vs. ASTM A182 Grade F122

R30816 cobalt belongs to the cobalt alloys classification, while ASTM A182 grade F122 belongs to the iron alloys. There are 27 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 R30816 cobalt and the bottom bar is ASTM A182 grade F122.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 280
220
Elastic (Young's, Tensile) Modulus, GPa 210
190
Elongation at Break, % 23
23
Fatigue Strength, MPa 250
320
Poisson's Ratio 0.3
0.28
Reduction in Area, % 22
45
Shear Modulus, GPa 81
76
Tensile Strength: Ultimate (UTS), MPa 1020
710
Tensile Strength: Yield (Proof), MPa 460
450

Thermal Properties

Latent Heat of Fusion, J/g 300
270
Melting Completion (Liquidus), °C 1540
1490
Melting Onset (Solidus), °C 1460
1440
Specific Heat Capacity, J/kg-K 420
470
Thermal Conductivity, W/m-K 13
24
Thermal Expansion, µm/m-K 12
13

Otherwise Unclassified Properties

Density, g/cm3 9.1
8.0
Embodied Carbon, kg CO2/kg material 20
3.0
Embodied Energy, MJ/kg 320
44
Embodied Water, L/kg 440
100

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 190
140
Resilience: Unit (Modulus of Resilience), kJ/m3 510
520
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 22
24
Strength to Weight: Axial, points 31
25
Strength to Weight: Bending, points 25
22
Thermal Diffusivity, mm2/s 3.3
6.4
Thermal Shock Resistance, points 28
19

Alloy Composition

Aluminum (Al), % 0
0 to 0.020
Boron (B), % 0
0 to 0.0050
Carbon (C), % 0.32 to 0.42
0.070 to 0.14
Chromium (Cr), % 19 to 21
10 to 11.5
Cobalt (Co), % 40 to 49.8
0
Copper (Cu), % 0
0.3 to 1.7
Iron (Fe), % 0 to 5.0
81.3 to 87.7
Manganese (Mn), % 1.0 to 2.0
0 to 0.7
Molybdenum (Mo), % 3.5 to 4.5
0.25 to 0.6
Nickel (Ni), % 19 to 21
0 to 0.5
Niobium (Nb), % 3.5 to 4.5
0.040 to 0.1
Nitrogen (N), % 0
0.040 to 0.1
Phosphorus (P), % 0 to 0.040
0 to 0.020
Silicon (Si), % 0 to 1.0
0 to 0.5
Sulfur (S), % 0 to 0.030
0 to 0.010
Tantalum (Ta), % 3.5 to 4.5
0
Titanium (Ti), % 0
0 to 0.010
Tungsten (W), % 3.5 to 4.5
1.5 to 2.5
Vanadium (V), % 0
0.15 to 0.3
Zirconium (Zr), % 0
0 to 0.010