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R30016 Cobalt vs. SAE-AISI M42 Steel

R30016 cobalt belongs to the cobalt alloys classification, while SAE-AISI M42 steel belongs to the iron alloys. There are 20 material properties with values for both materials. Properties with values for just one material (14, in this case) are not shown.

For each property being compared, the top bar is R30016 cobalt and the bottom bar is SAE-AISI M42 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 220
200
Poisson's Ratio 0.28
0.29
Shear Modulus, GPa 85
78
Tensile Strength: Ultimate (UTS), MPa 1010
810 to 2310

Thermal Properties

Latent Heat of Fusion, J/g 320
270
Melting Completion (Liquidus), °C 1360
1540
Melting Onset (Solidus), °C 1270
1490
Specific Heat Capacity, J/kg-K 450
450
Thermal Conductivity, W/m-K 15
20
Thermal Expansion, µm/m-K 14
12

Otherwise Unclassified Properties

Density, g/cm3 8.5
8.2
Embodied Carbon, kg CO2/kg material 7.7
7.4
Embodied Energy, MJ/kg 110
100
Embodied Water, L/kg 500
140

Common Calculations

Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 33
28 to 79
Strength to Weight: Bending, points 26
24 to 48
Thermal Diffusivity, mm2/s 3.9
5.4
Thermal Shock Resistance, points 24
25 to 71

Alloy Composition

Carbon (C), % 0.9 to 1.4
1.1 to 1.2
Chromium (Cr), % 28 to 32
3.5 to 4.3
Cobalt (Co), % 49.6 to 66.9
7.8 to 8.8
Copper (Cu), % 0
0 to 0.25
Iron (Fe), % 0 to 3.0
76.3 to 81
Manganese (Mn), % 0.5 to 2.0
0.15 to 0.4
Molybdenum (Mo), % 0 to 1.5
9.0 to 10
Nickel (Ni), % 0 to 3.0
0 to 0.3
Phosphorus (P), % 0
0 to 0.030
Silicon (Si), % 0.2 to 2.0
0.15 to 0.65
Sulfur (S), % 0
0 to 0.030
Tungsten (W), % 3.5 to 5.5
1.2 to 1.9
Vanadium (V), % 0
1.0 to 1.4