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EN 1.3555 Steel vs. R30816 Cobalt

EN 1.3555 steel belongs to the iron alloys classification, while R30816 cobalt belongs to the cobalt alloys. There are 19 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 R30816 cobalt.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 230
280
Elastic (Young's, Tensile) Modulus, GPa 190
210
Poisson's Ratio 0.29
0.3
Shear Modulus, GPa 75
81
Tensile Strength: Ultimate (UTS), MPa 770
1020

Thermal Properties

Latent Heat of Fusion, J/g 260
300
Melting Completion (Liquidus), °C 1500
1540
Melting Onset (Solidus), °C 1450
1460
Specific Heat Capacity, J/kg-K 460
420
Thermal Expansion, µm/m-K 13
12

Otherwise Unclassified Properties

Density, g/cm3 7.9
9.1
Embodied Carbon, kg CO2/kg material 5.6
20
Embodied Energy, MJ/kg 81
320
Embodied Water, L/kg 90
440

Common Calculations

Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 24
22
Strength to Weight: Axial, points 27
31
Strength to Weight: Bending, points 23
25
Thermal Shock Resistance, points 22
28

Alloy Composition

Carbon (C), % 0.1 to 0.15
0.32 to 0.42
Chromium (Cr), % 3.9 to 4.3
19 to 21
Cobalt (Co), % 0
40 to 49.8
Copper (Cu), % 0 to 0.1
0
Iron (Fe), % 85.4 to 87.7
0 to 5.0
Manganese (Mn), % 0.15 to 0.35
1.0 to 2.0
Molybdenum (Mo), % 4.0 to 4.5
3.5 to 4.5
Nickel (Ni), % 3.2 to 3.6
19 to 21
Niobium (Nb), % 0
3.5 to 4.5
Phosphorus (P), % 0 to 0.015
0 to 0.040
Silicon (Si), % 0.1 to 0.25
0 to 1.0
Sulfur (S), % 0 to 0.010
0 to 0.030
Tantalum (Ta), % 0
3.5 to 4.5
Tungsten (W), % 0 to 0.15
3.5 to 4.5
Vanadium (V), % 1.0 to 1.3
0