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G-CoCr28 Cobalt vs. R31537 Cobalt

Both G-CoCr28 cobalt and R31537 cobalt are cobalt alloys. They have 80% 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 G-CoCr28 cobalt and the bottom bar is R31537 cobalt.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 210
220
Elongation at Break, % 6.7
14 to 23
Fatigue Strength, MPa 130
310 to 480
Poisson's Ratio 0.28
0.29
Shear Modulus, GPa 83
87
Tensile Strength: Ultimate (UTS), MPa 560
1000 to 1340
Tensile Strength: Yield (Proof), MPa 260
590 to 940

Thermal Properties

Latent Heat of Fusion, J/g 320
320
Melting Completion (Liquidus), °C 1330
1360
Melting Onset (Solidus), °C 1270
1290
Specific Heat Capacity, J/kg-K 470
450
Thermal Conductivity, W/m-K 8.5
13
Thermal Expansion, µm/m-K 14
13

Otherwise Unclassified Properties

Density, g/cm3 8.1
8.4
Embodied Carbon, kg CO2/kg material 6.2
8.1
Embodied Energy, MJ/kg 84
110
Embodied Water, L/kg 440
530

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 31
140 to 200
Resilience: Unit (Modulus of Resilience), kJ/m3 160
780 to 1990
Stiffness to Weight: Axial, points 15
15
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 19
33 to 44
Strength to Weight: Bending, points 19
26 to 32
Thermal Diffusivity, mm2/s 2.2
3.4
Thermal Shock Resistance, points 14
24 to 32

Alloy Composition

Carbon (C), % 0.050 to 0.25
0 to 0.14
Chromium (Cr), % 27 to 30
26 to 30
Cobalt (Co), % 48 to 52
58.9 to 69
Iron (Fe), % 9.7 to 24.5
0 to 0.75
Manganese (Mn), % 0 to 1.5
0 to 1.0
Molybdenum (Mo), % 0 to 0.5
5.0 to 7.0
Nickel (Ni), % 0 to 4.0
0 to 1.0
Niobium (Nb), % 0 to 0.5
0
Nitrogen (N), % 0
0 to 0.25
Phosphorus (P), % 0 to 0.040
0
Silicon (Si), % 0.5 to 1.5
0 to 1.0
Sulfur (S), % 0 to 0.030
0