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EN 1.3558 Steel vs. R30605 Cobalt

EN 1.3558 steel belongs to the iron alloys classification, while R30605 cobalt belongs to the cobalt alloys. They have a modest 21% of their average alloy composition in common, which, by itself, doesn't mean much. There are 22 material properties with values for both materials. Properties with values for just one material (7, in this case) are not shown.

For each property being compared, the top bar is EN 1.3558 steel and the bottom bar is R30605 cobalt.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 210
210
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 80
81
Tensile Strength: Ultimate (UTS), MPa 770
1130 to 1900

Thermal Properties

Latent Heat of Fusion, J/g 240
290
Melting Completion (Liquidus), °C 1810
1410
Melting Onset (Solidus), °C 1760
1330
Specific Heat Capacity, J/kg-K 410
410
Thermal Conductivity, W/m-K 20
9.6
Thermal Expansion, µm/m-K 12
12

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 13
2.0
Electrical Conductivity: Equal Weight (Specific), % IACS 12
1.8

Otherwise Unclassified Properties

Density, g/cm3 9.3
9.6
Embodied Carbon, kg CO2/kg material 8.4
9.8
Embodied Energy, MJ/kg 130
140
Embodied Water, L/kg 90
450

Common Calculations

Stiffness to Weight: Axial, points 12
12
Stiffness to Weight: Bending, points 21
21
Strength to Weight: Axial, points 23
33 to 55
Strength to Weight: Bending, points 20
25 to 36
Thermal Diffusivity, mm2/s 5.3
2.5
Thermal Shock Resistance, points 22
31 to 52

Alloy Composition

Carbon (C), % 0.7 to 0.8
0.050 to 0.15
Chromium (Cr), % 3.9 to 4.3
19 to 21
Cobalt (Co), % 0
46.4 to 57
Copper (Cu), % 0 to 0.3
0
Iron (Fe), % 73.7 to 77.6
0 to 3.0
Manganese (Mn), % 0 to 0.4
1.0 to 2.0
Molybdenum (Mo), % 0 to 0.6
0
Nickel (Ni), % 0
9.0 to 11
Phosphorus (P), % 0 to 0.025
0 to 0.040
Silicon (Si), % 0 to 0.4
0 to 0.4
Sulfur (S), % 0 to 0.015
0 to 0.030
Tungsten (W), % 17.5 to 19
14 to 16
Vanadium (V), % 1.0 to 1.3
0