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R30075 Cobalt vs. EN 1.3555 Steel

R30075 cobalt belongs to the cobalt alloys classification, while EN 1.3555 steel belongs to the iron alloys. There are 20 material properties with values for both materials. Properties with values for just one material (12, in this case) are not shown.

For each property being compared, the top bar is R30075 cobalt and the bottom bar is EN 1.3555 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
75
Tensile Strength: Ultimate (UTS), MPa 780 to 1280
770

Thermal Properties

Latent Heat of Fusion, J/g 320
260
Melting Completion (Liquidus), °C 1360
1500
Melting Onset (Solidus), °C 1290
1450
Specific Heat Capacity, J/kg-K 450
460
Thermal Expansion, µm/m-K 12
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.0
9.3
Electrical Conductivity: Equal Weight (Specific), % IACS 2.1
11

Otherwise Unclassified Properties

Density, g/cm3 8.4
7.9
Embodied Carbon, kg CO2/kg material 8.1
5.6
Embodied Energy, MJ/kg 110
81
Embodied Water, L/kg 530
90

Common Calculations

Stiffness to Weight: Axial, points 14 to 17
14
Stiffness to Weight: Bending, points 24 to 25
24
Strength to Weight: Axial, points 26 to 42
27
Strength to Weight: Bending, points 22 to 31
23
Thermal Shock Resistance, points 21 to 29
22

Alloy Composition

Aluminum (Al), % 0 to 0.1
0
Boron (B), % 0 to 0.010
0
Carbon (C), % 0 to 0.35
0.1 to 0.15
Chromium (Cr), % 27 to 30
3.9 to 4.3
Cobalt (Co), % 58.7 to 68
0
Copper (Cu), % 0
0 to 0.1
Iron (Fe), % 0 to 0.75
85.4 to 87.7
Manganese (Mn), % 0 to 1.0
0.15 to 0.35
Molybdenum (Mo), % 5.0 to 7.0
4.0 to 4.5
Nickel (Ni), % 0 to 0.5
3.2 to 3.6
Nitrogen (N), % 0 to 0.25
0
Phosphorus (P), % 0 to 0.020
0 to 0.015
Silicon (Si), % 0 to 1.0
0.1 to 0.25
Sulfur (S), % 0 to 0.010
0 to 0.010
Titanium (Ti), % 0 to 0.1
0
Tungsten (W), % 0 to 0.2
0 to 0.15
Vanadium (V), % 0
1.0 to 1.3