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Grade C-2 Titanium vs. G-CoCr28 Cobalt

Grade C-2 titanium belongs to the titanium alloys classification, while G-CoCr28 cobalt belongs to the cobalt alloys. There are 27 material properties with values for both materials. Properties with values for just one material (4, in this case) are not shown.

For each property being compared, the top bar is grade C-2 titanium and the bottom bar is G-CoCr28 cobalt.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 110
210
Elongation at Break, % 17
6.7
Fatigue Strength, MPa 200
130
Poisson's Ratio 0.32
0.28
Shear Modulus, GPa 40
83
Tensile Strength: Ultimate (UTS), MPa 390
560
Tensile Strength: Yield (Proof), MPa 310
260

Thermal Properties

Latent Heat of Fusion, J/g 420
320
Maximum Temperature: Mechanical, °C 320
1200
Melting Completion (Liquidus), °C 1660
1330
Melting Onset (Solidus), °C 1610
1270
Specific Heat Capacity, J/kg-K 540
470
Thermal Conductivity, W/m-K 21
8.5
Thermal Expansion, µm/m-K 8.7
14

Otherwise Unclassified Properties

Base Metal Price, % relative 37
100
Density, g/cm3 4.5
8.1
Embodied Carbon, kg CO2/kg material 31
6.2
Embodied Energy, MJ/kg 510
84
Embodied Water, L/kg 110
440

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 61
31
Resilience: Unit (Modulus of Resilience), kJ/m3 460
160
Stiffness to Weight: Axial, points 13
15
Stiffness to Weight: Bending, points 35
24
Strength to Weight: Axial, points 24
19
Strength to Weight: Bending, points 26
19
Thermal Diffusivity, mm2/s 8.8
2.2
Thermal Shock Resistance, points 30
14

Alloy Composition

Carbon (C), % 0 to 0.1
0.050 to 0.25
Chromium (Cr), % 0
27 to 30
Cobalt (Co), % 0
48 to 52
Hydrogen (H), % 0 to 0.015
0
Iron (Fe), % 0 to 0.2
9.7 to 24.5
Manganese (Mn), % 0
0 to 1.5
Molybdenum (Mo), % 0
0 to 0.5
Nickel (Ni), % 0 to 0.050
0 to 4.0
Niobium (Nb), % 0
0 to 0.5
Oxygen (O), % 0 to 0.4
0
Phosphorus (P), % 0
0 to 0.040
Silicon (Si), % 0
0.5 to 1.5
Sulfur (S), % 0
0 to 0.030
Titanium (Ti), % 98.8 to 100
0
Residuals, % 0 to 0.4
0