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R30605 Cobalt vs. EN 1.8509 Steel

R30605 cobalt belongs to the cobalt alloys classification, while EN 1.8509 steel belongs to the iron alloys. There are 25 material properties with values for both materials. Properties with values for just one material (8, in this case) are not shown.

For each property being compared, the top bar is R30605 cobalt and the bottom bar is EN 1.8509 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 210
190
Elongation at Break, % 34
11
Fatigue Strength, MPa 260 to 590
580
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 81
73
Tensile Strength: Ultimate (UTS), MPa 1130 to 1900
1130
Tensile Strength: Yield (Proof), MPa 470 to 1600
940

Thermal Properties

Latent Heat of Fusion, J/g 290
250
Melting Completion (Liquidus), °C 1410
1450
Melting Onset (Solidus), °C 1330
1410
Specific Heat Capacity, J/kg-K 410
480
Thermal Conductivity, W/m-K 9.6
39
Thermal Expansion, µm/m-K 12
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.0
7.5
Electrical Conductivity: Equal Weight (Specific), % IACS 1.8
8.6

Otherwise Unclassified Properties

Density, g/cm3 9.6
7.8
Embodied Carbon, kg CO2/kg material 9.8
1.6
Embodied Energy, MJ/kg 140
22
Embodied Water, L/kg 450
65

Common Calculations

Stiffness to Weight: Axial, points 12
13
Stiffness to Weight: Bending, points 21
25
Strength to Weight: Axial, points 33 to 55
40
Strength to Weight: Bending, points 25 to 36
31
Thermal Diffusivity, mm2/s 2.5
10
Thermal Shock Resistance, points 31 to 52
33

Alloy Composition

Aluminum (Al), % 0
0.8 to 1.2
Carbon (C), % 0.050 to 0.15
0.38 to 0.45
Chromium (Cr), % 19 to 21
1.5 to 1.8
Cobalt (Co), % 46.4 to 57
0
Iron (Fe), % 0 to 3.0
95.5 to 97.1
Manganese (Mn), % 1.0 to 2.0
0.4 to 0.7
Molybdenum (Mo), % 0
0.2 to 0.35
Nickel (Ni), % 9.0 to 11
0
Phosphorus (P), % 0 to 0.040
0 to 0.025
Silicon (Si), % 0 to 0.4
0 to 0.4
Sulfur (S), % 0 to 0.030
0 to 0.035
Tungsten (W), % 14 to 16
0