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Grade 20 Titanium vs. R30605 Cobalt

Grade 20 titanium belongs to the titanium alloys classification, while R30605 cobalt belongs to the cobalt alloys. There are 21 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 R30605 cobalt.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 120
210
Elongation at Break, % 5.7 to 17
34
Fatigue Strength, MPa 550 to 630
260 to 590
Poisson's Ratio 0.32
0.29
Shear Modulus, GPa 47
81
Tensile Strength: Ultimate (UTS), MPa 900 to 1270
1130 to 1900
Tensile Strength: Yield (Proof), MPa 850 to 1190
470 to 1600

Thermal Properties

Latent Heat of Fusion, J/g 400
290
Melting Completion (Liquidus), °C 1660
1410
Melting Onset (Solidus), °C 1600
1330
Specific Heat Capacity, J/kg-K 520
410
Thermal Expansion, µm/m-K 9.6
12

Otherwise Unclassified Properties

Density, g/cm3 5.0
9.6
Embodied Carbon, kg CO2/kg material 52
9.8
Embodied Energy, MJ/kg 860
140
Embodied Water, L/kg 350
450

Common Calculations

Stiffness to Weight: Axial, points 14
12
Stiffness to Weight: Bending, points 33
21
Strength to Weight: Axial, points 50 to 70
33 to 55
Strength to Weight: Bending, points 41 to 52
25 to 36
Thermal Shock Resistance, points 55 to 77
31 to 52

Alloy Composition


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Aluminum (Al), % 3.0 to 4.0
0
Carbon (C), % 0 to 0.050
0.050 to 0.15
Chromium (Cr), % 5.5 to 6.5
19 to 21
Cobalt (Co), % 0
46.4 to 57
Hydrogen (H), % 0 to 0.020
0
Iron (Fe), % 0 to 0.3
0 to 3.0
Manganese (Mn), % 0
1.0 to 2.0
Molybdenum (Mo), % 3.5 to 4.5
0
Nickel (Ni), % 0
9.0 to 11
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 0.040
Silicon (Si), % 0
0 to 0.4
Sulfur (S), % 0
0 to 0.030
Titanium (Ti), % 71 to 77
0
Tungsten (W), % 0
14 to 16
Vanadium (V), % 7.5 to 8.5
0
Zirconium (Zr), % 3.5 to 4.5
0
Residuals, % 0 to 0.4
0

Comparable Variants