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R30021 Cobalt vs. R58150 Titanium

R30021 cobalt belongs to the cobalt alloys classification, while R58150 titanium belongs to the titanium alloys. There are 23 material properties with values for both materials. Properties with values for just one material (10, in this case) are not shown.

For each property being compared, the top bar is R30021 cobalt and the bottom bar is R58150 titanium.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 220
140
Elongation at Break, % 9.0
13
Fatigue Strength, MPa 250
330
Poisson's Ratio 0.29
0.32
Shear Modulus, GPa 86
52
Tensile Strength: Ultimate (UTS), MPa 700
770
Tensile Strength: Yield (Proof), MPa 500
550

Thermal Properties

Latent Heat of Fusion, J/g 330
410
Melting Completion (Liquidus), °C 1350
1760
Melting Onset (Solidus), °C 1190
1700
Specific Heat Capacity, J/kg-K 450
500
Thermal Expansion, µm/m-K 11
8.4

Otherwise Unclassified Properties

Density, g/cm3 8.4
5.4
Embodied Carbon, kg CO2/kg material 8.0
31
Embodied Energy, MJ/kg 110
480
Embodied Water, L/kg 520
150

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 57
94
Resilience: Unit (Modulus of Resilience), kJ/m3 570
1110
Stiffness to Weight: Axial, points 15
14
Stiffness to Weight: Bending, points 24
32
Strength to Weight: Axial, points 23
40
Strength to Weight: Bending, points 21
35
Thermal Shock Resistance, points 21
48

Alloy Composition

Carbon (C), % 0.2 to 0.35
0 to 0.1
Chromium (Cr), % 26 to 29
0
Cobalt (Co), % 61.7 to 67.3
0
Hydrogen (H), % 0
0 to 0.015
Iron (Fe), % 0 to 3.0
0 to 0.1
Molybdenum (Mo), % 4.5 to 6.0
14 to 16
Nickel (Ni), % 2.0 to 3.0
0
Nitrogen (N), % 0
0 to 0.050
Oxygen (O), % 0
0 to 0.2
Silicon (Si), % 0 to 1.5
0
Titanium (Ti), % 0
83.5 to 86