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Grade 20 Titanium vs. R30003 Cobalt

Grade 20 titanium belongs to the titanium alloys classification, while R30003 cobalt belongs to the cobalt alloys. There are 22 material properties with values for both materials. Properties with values for just one material (9, in this case) are not shown.

For each property being compared, the top bar is grade 20 titanium and the bottom bar is R30003 cobalt.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 120
210
Elongation at Break, % 5.7 to 17
10 to 73
Fatigue Strength, MPa 550 to 630
320 to 560
Poisson's Ratio 0.32
0.29
Shear Modulus, GPa 47
83
Tensile Strength: Ultimate (UTS), MPa 900 to 1270
970 to 1720
Tensile Strength: Yield (Proof), MPa 850 to 1190
510 to 1090

Thermal Properties

Latent Heat of Fusion, J/g 400
310
Melting Completion (Liquidus), °C 1660
1400
Melting Onset (Solidus), °C 1600
1440
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
8.0
Embodied Energy, MJ/kg 860
110
Embodied Water, L/kg 350
400

Common Calculations

Resilience: Unit (Modulus of Resilience), kJ/m3 2940 to 5760
600 to 2790
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 33
24
Strength to Weight: Axial, points 50 to 70
32 to 57
Strength to Weight: Bending, points 41 to 52
26 to 38
Thermal Shock Resistance, points 55 to 77
26 to 45

Alloy Composition


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Aluminum (Al), % 3.0 to 4.0
0
Boron (B), % 0
0 to 0.1
Carbon (C), % 0 to 0.050
0 to 0.15
Chromium (Cr), % 5.5 to 6.5
19 to 21
Cobalt (Co), % 0
39 to 41
Hydrogen (H), % 0 to 0.020
0
Iron (Fe), % 0 to 0.3
10 to 20.5
Manganese (Mn), % 0
1.5 to 2.5
Molybdenum (Mo), % 3.5 to 4.5
6.0 to 8.0
Nickel (Ni), % 0
14 to 16
Nitrogen (N), % 0 to 0.030
0
Oxygen (O), % 0 to 0.12
0
Palladium (Pd), % 0.040 to 0.080
0
Phosphorus (P), % 0
0 to 0.015
Silicon (Si), % 0
0 to 1.2
Sulfur (S), % 0
0 to 0.015
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