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R30012 Cobalt vs. G-CoCr28 Cobalt

Both R30012 cobalt and G-CoCr28 cobalt are cobalt alloys. They have 83% of their average alloy composition in common. There are 25 material properties with values for both materials. Properties with values for just one material (6, in this case) are not shown.

For each property being compared, the top bar is R30012 cobalt and the bottom bar is G-CoCr28 cobalt.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 220
210
Elongation at Break, % 1.0
6.7
Fatigue Strength, MPa 320
130
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 86
83
Tensile Strength: Ultimate (UTS), MPa 830
560
Tensile Strength: Yield (Proof), MPa 650
260

Thermal Properties

Latent Heat of Fusion, J/g 320
320
Melting Completion (Liquidus), °C 1470
1330
Melting Onset (Solidus), °C 1280
1270
Specific Heat Capacity, J/kg-K 440
470
Thermal Conductivity, W/m-K 15
8.5
Thermal Expansion, µm/m-K 12
14

Otherwise Unclassified Properties

Density, g/cm3 8.8
8.1
Embodied Carbon, kg CO2/kg material 8.3
6.2
Embodied Energy, MJ/kg 120
84
Embodied Water, L/kg 480
440

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 7.7
31
Resilience: Unit (Modulus of Resilience), kJ/m3 960
160
Stiffness to Weight: Axial, points 14
15
Stiffness to Weight: Bending, points 23
24
Strength to Weight: Axial, points 26
19
Strength to Weight: Bending, points 22
19
Thermal Diffusivity, mm2/s 3.8
2.2
Thermal Shock Resistance, points 23
14

Alloy Composition

Carbon (C), % 1.4 to 2.0
0.050 to 0.25
Chromium (Cr), % 27 to 32
27 to 30
Cobalt (Co), % 47.5 to 64.1
48 to 52
Iron (Fe), % 0 to 3.0
9.7 to 24.5
Manganese (Mn), % 0
0 to 1.5
Molybdenum (Mo), % 0 to 1.0
0 to 0.5
Nickel (Ni), % 0 to 3.0
0 to 4.0
Niobium (Nb), % 0
0 to 0.5
Phosphorus (P), % 0
0 to 0.040
Silicon (Si), % 0 to 2.0
0.5 to 1.5
Sulfur (S), % 0
0 to 0.030
Tungsten (W), % 7.5 to 9.5
0