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Grade C-6 Titanium vs. G-CoCr28 Cobalt

Grade C-6 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-6 titanium and the bottom bar is G-CoCr28 cobalt.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 100
210
Elongation at Break, % 9.0
6.7
Fatigue Strength, MPa 460
130
Poisson's Ratio 0.32
0.28
Shear Modulus, GPa 39
83
Tensile Strength: Ultimate (UTS), MPa 890
560
Tensile Strength: Yield (Proof), MPa 830
260

Thermal Properties

Latent Heat of Fusion, J/g 410
320
Maximum Temperature: Mechanical, °C 310
1200
Melting Completion (Liquidus), °C 1580
1330
Melting Onset (Solidus), °C 1530
1270
Specific Heat Capacity, J/kg-K 550
470
Thermal Conductivity, W/m-K 7.8
8.5
Thermal Expansion, µm/m-K 9.8
14

Otherwise Unclassified Properties

Base Metal Price, % relative 36
100
Density, g/cm3 4.5
8.1
Embodied Carbon, kg CO2/kg material 30
6.2
Embodied Energy, MJ/kg 480
84
Embodied Water, L/kg 190
440

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 78
31
Resilience: Unit (Modulus of Resilience), kJ/m3 3300
160
Stiffness to Weight: Axial, points 13
15
Stiffness to Weight: Bending, points 35
24
Strength to Weight: Axial, points 55
19
Strength to Weight: Bending, points 46
19
Thermal Diffusivity, mm2/s 3.2
2.2
Thermal Shock Resistance, points 63
14

Alloy Composition


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Aluminum (Al), % 4.0 to 6.0
0
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 0.5
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 0.2
0
Phosphorus (P), % 0
0 to 0.040
Silicon (Si), % 0
0.5 to 1.5
Sulfur (S), % 0
0 to 0.030
Tin (Sn), % 2.0 to 3.0
0
Titanium (Ti), % 89.7 to 94
0
Residuals, % 0 to 0.4
0