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R30155 Cobalt vs. EN 1.7323 Steel

Both R30155 cobalt and EN 1.7323 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 23 material properties with values for both materials. Properties with values for just one material (11, in this case) are not shown.

For each property being compared, the top bar is R30155 cobalt and the bottom bar is EN 1.7323 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 220
150 to 180
Elastic (Young's, Tensile) Modulus, GPa 210
190
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 81
73
Tensile Strength: Ultimate (UTS), MPa 850
480 to 1460

Thermal Properties

Latent Heat of Fusion, J/g 300
250
Maximum Temperature: Mechanical, °C 1100
410
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
45
Thermal Expansion, µm/m-K 14
13

Otherwise Unclassified Properties

Base Metal Price, % relative 80
2.5
Density, g/cm3 8.5
7.9
Embodied Carbon, kg CO2/kg material 9.7
1.5
Embodied Energy, MJ/kg 150
20
Embodied Water, L/kg 300
50

Common Calculations

Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 23
24
Strength to Weight: Axial, points 28
17 to 52
Strength to Weight: Bending, points 24
17 to 36
Thermal Diffusivity, mm2/s 3.2
12
Thermal Shock Resistance, points 21
14 to 43

Alloy Composition

Carbon (C), % 0.080 to 0.16
0.17 to 0.23
Chromium (Cr), % 20 to 22.5
0.3 to 0.6
Cobalt (Co), % 18.5 to 21
0
Copper (Cu), % 0
0 to 0.25
Iron (Fe), % 24.3 to 36.2
97.1 to 98.4
Manganese (Mn), % 1.0 to 2.0
0.7 to 1.0
Molybdenum (Mo), % 2.5 to 3.5
0.4 to 0.5
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
0.020 to 0.040
Tantalum (Ta), % 0.75 to 1.3
0
Tungsten (W), % 2.0 to 3.0
0