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R30155 Cobalt vs. EN 1.5520 Steel

Both R30155 cobalt and EN 1.5520 steel are iron alloys. They have a modest 32% of their average alloy composition in common, which, by itself, doesn't mean much. There are 30 material properties with values for both materials. Properties with values for just one material (4, in this case) are not shown.

For each property being compared, the top bar is R30155 cobalt and the bottom bar is EN 1.5520 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 220
120 to 170
Elastic (Young's, Tensile) Modulus, GPa 210
190
Elongation at Break, % 34
11 to 21
Fatigue Strength, MPa 310
210 to 300
Poisson's Ratio 0.29
0.29
Reduction in Area, % 34
62 to 75
Shear Modulus, GPa 81
73
Shear Strength, MPa 570
290 to 340
Tensile Strength: Ultimate (UTS), MPa 850
410 to 1410
Tensile Strength: Yield (Proof), MPa 390
300 to 480

Thermal Properties

Latent Heat of Fusion, J/g 300
250
Maximum Temperature: Mechanical, °C 1100
400
Melting Completion (Liquidus), °C 1470
1460
Melting Onset (Solidus), °C 1420
1420
Specific Heat Capacity, J/kg-K 450
470
Thermal Conductivity, W/m-K 12
50
Thermal Expansion, µm/m-K 14
13

Otherwise Unclassified Properties

Base Metal Price, % relative 80
1.9
Density, g/cm3 8.5
7.8
Embodied Carbon, kg CO2/kg material 9.7
1.4
Embodied Energy, MJ/kg 150
19
Embodied Water, L/kg 300
48

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 230
42 to 230
Resilience: Unit (Modulus of Resilience), kJ/m3 370
240 to 600
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 23
24
Strength to Weight: Axial, points 28
15 to 50
Strength to Weight: Bending, points 24
16 to 36
Thermal Diffusivity, mm2/s 3.2
13
Thermal Shock Resistance, points 21
12 to 41

Alloy Composition

Boron (B), % 0
0.00080 to 0.0050
Carbon (C), % 0.080 to 0.16
0.15 to 0.2
Chromium (Cr), % 20 to 22.5
0 to 0.3
Cobalt (Co), % 18.5 to 21
0
Copper (Cu), % 0
0 to 0.25
Iron (Fe), % 24.3 to 36.2
97.7 to 98.9
Manganese (Mn), % 1.0 to 2.0
0.9 to 1.2
Molybdenum (Mo), % 2.5 to 3.5
0
Nickel (Ni), % 19 to 21
0
Niobium (Nb), % 0.75 to 1.3
0
Nitrogen (N), % 0 to 0.2
0
Phosphorus (P), % 0 to 0.040
0 to 0.025
Silicon (Si), % 0 to 1.0
0 to 0.3
Sulfur (S), % 0 to 0.030
0 to 0.025
Tantalum (Ta), % 0.75 to 1.3
0
Tungsten (W), % 2.0 to 3.0
0