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Grade 20 Titanium vs. R31537 Cobalt

Grade 20 titanium belongs to the titanium alloys classification, while R31537 cobalt belongs to the cobalt alloys. There are 24 material properties with values for both materials. Properties with values for just one material (7, in this case) are not shown.

For each property being compared, the top bar is grade 20 titanium and the bottom bar is R31537 cobalt.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 120
220
Elongation at Break, % 5.7 to 17
14 to 23
Fatigue Strength, MPa 550 to 630
310 to 480
Poisson's Ratio 0.32
0.29
Reduction in Area, % 23
13 to 23
Shear Modulus, GPa 47
87
Tensile Strength: Ultimate (UTS), MPa 900 to 1270
1000 to 1340
Tensile Strength: Yield (Proof), MPa 850 to 1190
590 to 940

Thermal Properties

Latent Heat of Fusion, J/g 400
320
Melting Completion (Liquidus), °C 1660
1360
Melting Onset (Solidus), °C 1600
1290
Specific Heat Capacity, J/kg-K 520
450
Thermal Expansion, µm/m-K 9.6
13

Otherwise Unclassified Properties

Density, g/cm3 5.0
8.4
Embodied Carbon, kg CO2/kg material 52
8.1
Embodied Energy, MJ/kg 860
110
Embodied Water, L/kg 350
530

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 71 to 150
140 to 200
Resilience: Unit (Modulus of Resilience), kJ/m3 2940 to 5760
780 to 1990
Stiffness to Weight: Axial, points 14
15
Stiffness to Weight: Bending, points 33
24
Strength to Weight: Axial, points 50 to 70
33 to 44
Strength to Weight: Bending, points 41 to 52
26 to 32
Thermal Shock Resistance, points 55 to 77
24 to 32

Alloy Composition

Aluminum (Al), % 3.0 to 4.0
0
Carbon (C), % 0 to 0.050
0 to 0.14
Chromium (Cr), % 5.5 to 6.5
26 to 30
Cobalt (Co), % 0
58.9 to 69
Hydrogen (H), % 0 to 0.020
0
Iron (Fe), % 0 to 0.3
0 to 0.75
Manganese (Mn), % 0
0 to 1.0
Molybdenum (Mo), % 3.5 to 4.5
5.0 to 7.0
Nickel (Ni), % 0
0 to 1.0
Nitrogen (N), % 0 to 0.030
0 to 0.25
Oxygen (O), % 0 to 0.12
0
Palladium (Pd), % 0.040 to 0.080
0
Silicon (Si), % 0
0 to 1.0
Titanium (Ti), % 71 to 77
0
Vanadium (V), % 7.5 to 8.5
0
Zirconium (Zr), % 3.5 to 4.5
0
Residuals, % 0 to 0.4
0

Comparable Variants