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EN 1.3555 Steel vs. R30021 Cobalt

EN 1.3555 steel belongs to the iron alloys classification, while R30021 cobalt belongs to the cobalt alloys. There are 20 material properties with values for both materials. Properties with values for just one material (13, in this case) are not shown.

For each property being compared, the top bar is EN 1.3555 steel and the bottom bar is R30021 cobalt.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
220
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 75
86
Tensile Strength: Ultimate (UTS), MPa 770
700

Thermal Properties

Latent Heat of Fusion, J/g 260
330
Melting Completion (Liquidus), °C 1500
1350
Melting Onset (Solidus), °C 1450
1190
Specific Heat Capacity, J/kg-K 460
450
Thermal Expansion, µm/m-K 13
11

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 9.3
1.9
Electrical Conductivity: Equal Weight (Specific), % IACS 11
2.1

Otherwise Unclassified Properties

Density, g/cm3 7.9
8.4
Embodied Carbon, kg CO2/kg material 5.6
8.0
Embodied Energy, MJ/kg 81
110
Embodied Water, L/kg 90
520

Common Calculations

Stiffness to Weight: Axial, points 14
15
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 27
23
Strength to Weight: Bending, points 23
21
Thermal Shock Resistance, points 22
21

Alloy Composition

Carbon (C), % 0.1 to 0.15
0.2 to 0.35
Chromium (Cr), % 3.9 to 4.3
26 to 29
Cobalt (Co), % 0
61.7 to 67.3
Copper (Cu), % 0 to 0.1
0
Iron (Fe), % 85.4 to 87.7
0 to 3.0
Manganese (Mn), % 0.15 to 0.35
0
Molybdenum (Mo), % 4.0 to 4.5
4.5 to 6.0
Nickel (Ni), % 3.2 to 3.6
2.0 to 3.0
Phosphorus (P), % 0 to 0.015
0
Silicon (Si), % 0.1 to 0.25
0 to 1.5
Sulfur (S), % 0 to 0.010
0
Tungsten (W), % 0 to 0.15
0
Vanadium (V), % 1.0 to 1.3
0