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R30075 Cobalt vs. EN 1.1118 Cast Steel

R30075 cobalt belongs to the cobalt alloys classification, while EN 1.1118 cast steel belongs to the iron alloys. There are 27 material properties with values for both materials. Properties with values for just one material (3, in this case) are not shown.

For each property being compared, the top bar is R30075 cobalt and the bottom bar is EN 1.1118 cast steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 210 to 250
190
Elongation at Break, % 12
14 to 21
Fatigue Strength, MPa 250 to 840
320 to 400
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 82 to 98
73
Tensile Strength: Ultimate (UTS), MPa 780 to 1280
700 to 750
Tensile Strength: Yield (Proof), MPa 480 to 840
460 to 630

Thermal Properties

Latent Heat of Fusion, J/g 320
250
Melting Completion (Liquidus), °C 1360
1460
Melting Onset (Solidus), °C 1290
1420
Specific Heat Capacity, J/kg-K 450
470
Thermal Conductivity, W/m-K 13
51
Thermal Expansion, µm/m-K 12
12

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.0
7.2
Electrical Conductivity: Equal Weight (Specific), % IACS 2.1
8.3

Otherwise Unclassified Properties

Density, g/cm3 8.4
7.8
Embodied Carbon, kg CO2/kg material 8.1
1.4
Embodied Energy, MJ/kg 110
19
Embodied Water, L/kg 530
48

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 84 to 140
97 to 130
Resilience: Unit (Modulus of Resilience), kJ/m3 560 to 1410
550 to 1050
Stiffness to Weight: Axial, points 14 to 17
13
Stiffness to Weight: Bending, points 24 to 25
24
Strength to Weight: Axial, points 26 to 42
25 to 27
Strength to Weight: Bending, points 22 to 31
22 to 23
Thermal Diffusivity, mm2/s 3.5
14
Thermal Shock Resistance, points 21 to 29
22 to 24

Alloy Composition

Aluminum (Al), % 0 to 0.1
0
Boron (B), % 0 to 0.010
0
Carbon (C), % 0 to 0.35
0.2 to 0.25
Chromium (Cr), % 27 to 30
0
Cobalt (Co), % 58.7 to 68
0
Iron (Fe), % 0 to 0.75
97.3 to 98.3
Manganese (Mn), % 0 to 1.0
1.5 to 1.8
Molybdenum (Mo), % 5.0 to 7.0
0
Nickel (Ni), % 0 to 0.5
0
Nitrogen (N), % 0 to 0.25
0
Phosphorus (P), % 0 to 0.020
0 to 0.020
Silicon (Si), % 0 to 1.0
0 to 0.6
Sulfur (S), % 0 to 0.010
0 to 0.015
Titanium (Ti), % 0 to 0.1
0
Tungsten (W), % 0 to 0.2
0