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R30001 Cobalt vs. EN 1.5418 Steel

R30001 cobalt belongs to the cobalt alloys classification, while EN 1.5418 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 R30001 cobalt and the bottom bar is EN 1.5418 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 220
190
Poisson's Ratio 0.28
0.29
Shear Modulus, GPa 86
73
Tensile Strength: Ultimate (UTS), MPa 620
490 to 1780

Thermal Properties

Latent Heat of Fusion, J/g 310
250
Melting Completion (Liquidus), °C 1530
1460
Melting Onset (Solidus), °C 1260
1420
Specific Heat Capacity, J/kg-K 430
470
Thermal Conductivity, W/m-K 15
48
Thermal Expansion, µm/m-K 11
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 1.8
7.1
Electrical Conductivity: Equal Weight (Specific), % IACS 1.8
8.2

Otherwise Unclassified Properties

Density, g/cm3 9.0
7.8
Embodied Carbon, kg CO2/kg material 8.9
1.5
Embodied Energy, MJ/kg 130
19
Embodied Water, L/kg 460
47

Common Calculations

Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 22
24
Strength to Weight: Axial, points 19
17 to 63
Strength to Weight: Bending, points 18
18 to 42
Thermal Diffusivity, mm2/s 3.7
13
Thermal Shock Resistance, points 19
14 to 53

Alloy Composition

Carbon (C), % 2.0 to 3.0
0.35 to 0.4
Chromium (Cr), % 28 to 32
0
Cobalt (Co), % 43 to 59
0
Copper (Cu), % 0
0 to 0.25
Iron (Fe), % 0 to 3.0
97.8 to 98.9
Manganese (Mn), % 0
0.6 to 0.9
Molybdenum (Mo), % 0 to 1.0
0.2 to 0.3
Nickel (Ni), % 0 to 3.0
0
Phosphorus (P), % 0
0 to 0.025
Silicon (Si), % 0 to 2.0
0 to 0.3
Sulfur (S), % 0
0 to 0.025
Tungsten (W), % 11 to 13
0