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R30016 Cobalt vs. SAE-AISI H42 Steel

R30016 cobalt belongs to the cobalt alloys classification, while SAE-AISI H42 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 H42 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
77
Tensile Strength: Ultimate (UTS), MPa 1010
700 to 1980

Thermal Properties

Latent Heat of Fusion, J/g 320
260
Melting Completion (Liquidus), °C 1360
1620
Melting Onset (Solidus), °C 1270
1570
Specific Heat Capacity, J/kg-K 450
440
Thermal Conductivity, W/m-K 15
24
Thermal Expansion, µm/m-K 14
12

Otherwise Unclassified Properties

Density, g/cm3 8.5
8.4
Embodied Carbon, kg CO2/kg material 7.7
8.8
Embodied Energy, MJ/kg 110
130
Embodied Water, L/kg 500
98

Common Calculations

Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 24
23
Strength to Weight: Axial, points 33
23 to 65
Strength to Weight: Bending, points 26
21 to 42
Thermal Diffusivity, mm2/s 3.9
6.5
Thermal Shock Resistance, points 24
20 to 57

Alloy Composition

Carbon (C), % 0.9 to 1.4
0.55 to 0.7
Chromium (Cr), % 28 to 32
3.8 to 4.5
Cobalt (Co), % 49.6 to 66.9
0
Copper (Cu), % 0
0 to 0.25
Iron (Fe), % 0 to 3.0
79.3 to 83.8
Manganese (Mn), % 0.5 to 2.0
0.15 to 0.4
Molybdenum (Mo), % 0 to 1.5
4.5 to 5.5
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
Sulfur (S), % 0
0 to 0.030
Tungsten (W), % 3.5 to 5.5
5.5 to 6.8
Vanadium (V), % 0
1.8 to 2.2