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Grade 18 Titanium vs. R30003 Cobalt

Grade 18 titanium belongs to the titanium alloys classification, while R30003 cobalt belongs to the cobalt alloys. There are 26 material properties with values for both materials. Properties with values for just one material (5, in this case) are not shown.

For each property being compared, the top bar is grade 18 titanium and the bottom bar is R30003 cobalt.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 110
210
Elongation at Break, % 11 to 17
10 to 73
Fatigue Strength, MPa 330 to 480
320 to 560
Poisson's Ratio 0.32
0.29
Shear Modulus, GPa 40
83
Tensile Strength: Ultimate (UTS), MPa 690 to 980
970 to 1720
Tensile Strength: Yield (Proof), MPa 540 to 810
510 to 1090

Thermal Properties

Latent Heat of Fusion, J/g 410
310
Melting Completion (Liquidus), °C 1640
1400
Melting Onset (Solidus), °C 1590
1440
Specific Heat Capacity, J/kg-K 550
450
Thermal Conductivity, W/m-K 8.3
13
Thermal Expansion, µm/m-K 9.9
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 1.3
2.0
Electrical Conductivity: Equal Weight (Specific), % IACS 2.7
2.1

Otherwise Unclassified Properties

Density, g/cm3 4.5
8.4
Embodied Carbon, kg CO2/kg material 41
8.0
Embodied Energy, MJ/kg 670
110
Embodied Water, L/kg 270
400

Common Calculations

Resilience: Unit (Modulus of Resilience), kJ/m3 1380 to 3110
600 to 2790
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 35
24
Strength to Weight: Axial, points 43 to 61
32 to 57
Strength to Weight: Bending, points 39 to 49
26 to 38
Thermal Diffusivity, mm2/s 3.4
3.3
Thermal Shock Resistance, points 47 to 67
26 to 45

Alloy Composition


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Aluminum (Al), % 2.5 to 3.5
0
Boron (B), % 0
0 to 0.1
Carbon (C), % 0 to 0.080
0 to 0.15
Chromium (Cr), % 0
19 to 21
Cobalt (Co), % 0
39 to 41
Hydrogen (H), % 0 to 0.015
0
Iron (Fe), % 0 to 0.25
10 to 20.5
Manganese (Mn), % 0
1.5 to 2.5
Molybdenum (Mo), % 0
6.0 to 8.0
Nickel (Ni), % 0
14 to 16
Nitrogen (N), % 0 to 0.030
0
Oxygen (O), % 0 to 0.15
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), % 92.5 to 95.5
0
Vanadium (V), % 2.0 to 3.0
0
Residuals, % 0 to 0.4
0

Comparable Variants