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R30816 Cobalt vs. EN 1.1165 Cast Steel

R30816 cobalt belongs to the cobalt alloys classification, while EN 1.1165 cast steel belongs to the iron alloys. There are 25 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 R30816 cobalt and the bottom bar is EN 1.1165 cast steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 210
190
Elongation at Break, % 23
11 to 20
Fatigue Strength, MPa 250
200 to 380
Poisson's Ratio 0.3
0.29
Shear Modulus, GPa 81
73
Tensile Strength: Ultimate (UTS), MPa 1020
600 to 780
Tensile Strength: Yield (Proof), MPa 460
290 to 620

Thermal Properties

Latent Heat of Fusion, J/g 300
250
Melting Completion (Liquidus), °C 1540
1460
Melting Onset (Solidus), °C 1460
1420
Specific Heat Capacity, J/kg-K 420
470
Thermal Conductivity, W/m-K 13
51
Thermal Expansion, µm/m-K 12
12

Otherwise Unclassified Properties

Density, g/cm3 9.1
7.8
Embodied Carbon, kg CO2/kg material 20
1.4
Embodied Energy, MJ/kg 320
19
Embodied Water, L/kg 440
47

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 190
81 to 100
Resilience: Unit (Modulus of Resilience), kJ/m3 510
230 to 1010
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 22
24
Strength to Weight: Axial, points 31
21 to 28
Strength to Weight: Bending, points 25
20 to 24
Thermal Diffusivity, mm2/s 3.3
14
Thermal Shock Resistance, points 28
19 to 25

Alloy Composition

Carbon (C), % 0.32 to 0.42
0.25 to 0.32
Chromium (Cr), % 19 to 21
0
Cobalt (Co), % 40 to 49.8
0
Iron (Fe), % 0 to 5.0
97.2 to 98.6
Manganese (Mn), % 1.0 to 2.0
1.2 to 1.8
Molybdenum (Mo), % 3.5 to 4.5
0
Nickel (Ni), % 19 to 21
0
Niobium (Nb), % 3.5 to 4.5
0
Phosphorus (P), % 0 to 0.040
0 to 0.035
Silicon (Si), % 0 to 1.0
0 to 0.6
Sulfur (S), % 0 to 0.030
0 to 0.030
Tantalum (Ta), % 3.5 to 4.5
0
Tungsten (W), % 3.5 to 4.5
0