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R30075 Cobalt vs. EN 1.6587 Steel

R30075 cobalt belongs to the cobalt alloys classification, while EN 1.6587 steel belongs to the iron alloys. There are 22 material properties with values for both materials. Properties with values for just one material (10, in this case) are not shown.

For each property being compared, the top bar is R30075 cobalt and the bottom bar is EN 1.6587 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 210 to 250
190
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 82 to 98
73
Tensile Strength: Ultimate (UTS), MPa 780 to 1280
520 to 1420

Thermal Properties

Latent Heat of Fusion, J/g 320
250
Melting Completion (Liquidus), °C 1360
1460
Melting Onset (Solidus), °C 1290
1420
Specific Heat Capacity, J/kg-K 450
470
Thermal Conductivity, W/m-K 13
41
Thermal Expansion, µm/m-K 12
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.0
7.6
Electrical Conductivity: Equal Weight (Specific), % IACS 2.1
8.8

Otherwise Unclassified Properties

Density, g/cm3 8.4
7.9
Embodied Carbon, kg CO2/kg material 8.1
1.7
Embodied Energy, MJ/kg 110
22
Embodied Water, L/kg 530
58

Common Calculations

Stiffness to Weight: Axial, points 14 to 17
13
Stiffness to Weight: Bending, points 24 to 25
24
Strength to Weight: Axial, points 26 to 42
18 to 50
Strength to Weight: Bending, points 22 to 31
18 to 36
Thermal Diffusivity, mm2/s 3.5
11
Thermal Shock Resistance, points 21 to 29
15 to 42

Alloy Composition

Aluminum (Al), % 0 to 0.1
0 to 0.050
Boron (B), % 0 to 0.010
0
Carbon (C), % 0 to 0.35
0.15 to 0.21
Chromium (Cr), % 27 to 30
1.5 to 1.8
Cobalt (Co), % 58.7 to 68
0
Copper (Cu), % 0
0 to 0.3
Iron (Fe), % 0 to 0.75
94.4 to 96.4
Manganese (Mn), % 0 to 1.0
0.5 to 0.9
Molybdenum (Mo), % 5.0 to 7.0
0.25 to 0.35
Nickel (Ni), % 0 to 0.5
1.4 to 1.7
Nitrogen (N), % 0 to 0.25
0
Oxygen (O), % 0
0 to 0.0020
Phosphorus (P), % 0 to 0.020
0 to 0.025
Silicon (Si), % 0 to 1.0
0 to 0.4
Sulfur (S), % 0 to 0.010
0 to 0.030
Titanium (Ti), % 0 to 0.1
0
Tungsten (W), % 0 to 0.2
0

Comparable Variants