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R30155 Cobalt vs. EN 1.6220 Steel

Both R30155 cobalt and EN 1.6220 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 28 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 R30155 cobalt and the bottom bar is EN 1.6220 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 220
170
Elastic (Young's, Tensile) Modulus, GPa 210
190
Elongation at Break, % 34
23 to 25
Fatigue Strength, MPa 310
240 to 250
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 81
73
Tensile Strength: Ultimate (UTS), MPa 850
550 to 580
Tensile Strength: Yield (Proof), MPa 390
340

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
52
Thermal Expansion, µm/m-K 14
13

Otherwise Unclassified Properties

Base Metal Price, % relative 80
2.1
Density, g/cm3 8.5
7.8
Embodied Carbon, kg CO2/kg material 9.7
1.5
Embodied Energy, MJ/kg 150
19
Embodied Water, L/kg 300
48

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 230
110 to 120
Resilience: Unit (Modulus of Resilience), kJ/m3 370
300 to 310
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 23
24
Strength to Weight: Axial, points 28
19 to 20
Strength to Weight: Bending, points 24
19 to 20
Thermal Diffusivity, mm2/s 3.2
14
Thermal Shock Resistance, points 21
16 to 17

Alloy Composition

Carbon (C), % 0.080 to 0.16
0.17 to 0.23
Chromium (Cr), % 20 to 22.5
0
Cobalt (Co), % 18.5 to 21
0
Iron (Fe), % 24.3 to 36.2
96.7 to 98.8
Manganese (Mn), % 1.0 to 2.0
1.0 to 1.6
Molybdenum (Mo), % 2.5 to 3.5
0
Nickel (Ni), % 19 to 21
0 to 0.8
Niobium (Nb), % 0.75 to 1.3
0
Nitrogen (N), % 0 to 0.2
0
Phosphorus (P), % 0 to 0.040
0 to 0.020
Silicon (Si), % 0 to 1.0
0 to 0.6
Sulfur (S), % 0 to 0.030
0 to 0.030
Tantalum (Ta), % 0.75 to 1.3
0
Tungsten (W), % 2.0 to 3.0
0