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Grade C-6 Titanium vs. R31537 Cobalt

Grade C-6 titanium belongs to the titanium alloys classification, while R31537 cobalt belongs to the cobalt alloys. There are 28 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 R31537 cobalt.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 100
220
Elongation at Break, % 9.0
14 to 23
Fatigue Strength, MPa 460
310 to 480
Poisson's Ratio 0.32
0.29
Rockwell C Hardness 32
25 to 35
Shear Modulus, GPa 39
87
Tensile Strength: Ultimate (UTS), MPa 890
1000 to 1340
Tensile Strength: Yield (Proof), MPa 830
590 to 940

Thermal Properties

Latent Heat of Fusion, J/g 410
320
Melting Completion (Liquidus), °C 1580
1360
Melting Onset (Solidus), °C 1530
1290
Specific Heat Capacity, J/kg-K 550
450
Thermal Conductivity, W/m-K 7.8
13
Thermal Expansion, µm/m-K 9.8
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 1.2
2.0
Electrical Conductivity: Equal Weight (Specific), % IACS 2.5
2.1

Otherwise Unclassified Properties

Density, g/cm3 4.5
8.4
Embodied Carbon, kg CO2/kg material 30
8.1
Embodied Energy, MJ/kg 480
110
Embodied Water, L/kg 190
530

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 78
140 to 200
Resilience: Unit (Modulus of Resilience), kJ/m3 3300
780 to 1990
Stiffness to Weight: Axial, points 13
15
Stiffness to Weight: Bending, points 35
24
Strength to Weight: Axial, points 55
33 to 44
Strength to Weight: Bending, points 46
26 to 32
Thermal Diffusivity, mm2/s 3.2
3.4
Thermal Shock Resistance, points 63
24 to 32

Alloy Composition

Aluminum (Al), % 4.0 to 6.0
0
Carbon (C), % 0 to 0.1
0 to 0.14
Chromium (Cr), % 0
26 to 30
Cobalt (Co), % 0
58.9 to 69
Hydrogen (H), % 0 to 0.015
0
Iron (Fe), % 0 to 0.5
0 to 0.75
Manganese (Mn), % 0
0 to 1.0
Molybdenum (Mo), % 0
5.0 to 7.0
Nickel (Ni), % 0 to 0.050
0 to 1.0
Nitrogen (N), % 0
0 to 0.25
Oxygen (O), % 0 to 0.2
0
Silicon (Si), % 0
0 to 1.0
Tin (Sn), % 2.0 to 3.0
0
Titanium (Ti), % 89.7 to 94
0
Residuals, % 0 to 0.4
0