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R30605 Cobalt vs. SAE-AISI M50 Steel

R30605 cobalt belongs to the cobalt alloys classification, while SAE-AISI M50 steel belongs to the iron alloys. There are 22 material properties with values for both materials. Properties with values for just one material (5, in this case) are not shown.

For each property being compared, the top bar is R30605 cobalt and the bottom bar is SAE-AISI M50 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 210
190
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 81
75
Tensile Strength: Ultimate (UTS), MPa 1130 to 1900
720 to 2250

Thermal Properties

Latent Heat of Fusion, J/g 290
260
Melting Completion (Liquidus), °C 1410
1480
Melting Onset (Solidus), °C 1330
1440
Specific Heat Capacity, J/kg-K 410
470
Thermal Conductivity, W/m-K 9.6
35
Thermal Expansion, µm/m-K 12
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.0
8.7
Electrical Conductivity: Equal Weight (Specific), % IACS 1.8
10

Otherwise Unclassified Properties

Density, g/cm3 9.6
7.9
Embodied Carbon, kg CO2/kg material 9.8
5.1
Embodied Energy, MJ/kg 140
74
Embodied Water, L/kg 450
83

Common Calculations

Stiffness to Weight: Axial, points 12
14
Stiffness to Weight: Bending, points 21
25
Strength to Weight: Axial, points 33 to 55
26 to 80
Strength to Weight: Bending, points 25 to 36
23 to 49
Thermal Diffusivity, mm2/s 2.5
9.7
Thermal Shock Resistance, points 31 to 52
21 to 66

Alloy Composition

Carbon (C), % 0.050 to 0.15
0.78 to 0.88
Chromium (Cr), % 19 to 21
3.8 to 4.5
Cobalt (Co), % 46.4 to 57
0
Copper (Cu), % 0
0 to 0.25
Iron (Fe), % 0 to 3.0
87 to 90.4
Manganese (Mn), % 1.0 to 2.0
0.15 to 0.45
Molybdenum (Mo), % 0
3.9 to 4.8
Nickel (Ni), % 9.0 to 11
0 to 0.3
Phosphorus (P), % 0 to 0.040
0 to 0.030
Silicon (Si), % 0 to 0.4
0.2 to 0.6
Sulfur (S), % 0 to 0.030
0 to 0.030
Tungsten (W), % 14 to 16
0
Vanadium (V), % 0
0.8 to 1.3

Comparable Variants