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R30012 Cobalt vs. Grade Ti-Pd18 Titanium

R30012 cobalt belongs to the cobalt alloys classification, while grade Ti-Pd18 titanium belongs to the titanium alloys. There are 28 material properties with values for both materials. Properties with values for just one material (3, in this case) are not shown.

For each property being compared, the top bar is R30012 cobalt and the bottom bar is grade Ti-Pd18 titanium.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 220
110
Elongation at Break, % 1.0
17
Fatigue Strength, MPa 320
350
Poisson's Ratio 0.28
0.32
Rockwell C Hardness 48
34
Shear Modulus, GPa 86
40
Tensile Strength: Ultimate (UTS), MPa 830
710
Tensile Strength: Yield (Proof), MPa 650
540

Thermal Properties

Latent Heat of Fusion, J/g 320
410
Melting Completion (Liquidus), °C 1470
1640
Melting Onset (Solidus), °C 1280
1590
Specific Heat Capacity, J/kg-K 440
550
Thermal Conductivity, W/m-K 15
8.2
Thermal Expansion, µm/m-K 12
9.1

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 1.8
1.4
Electrical Conductivity: Equal Weight (Specific), % IACS 1.8
2.7

Otherwise Unclassified Properties

Density, g/cm3 8.8
4.5
Embodied Carbon, kg CO2/kg material 8.3
41
Embodied Energy, MJ/kg 120
670
Embodied Water, L/kg 480
270

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 7.7
110
Resilience: Unit (Modulus of Resilience), kJ/m3 960
1380
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 23
35
Strength to Weight: Axial, points 26
44
Strength to Weight: Bending, points 22
39
Thermal Diffusivity, mm2/s 3.8
3.3
Thermal Shock Resistance, points 23
52

Alloy Composition

Aluminum (Al), % 0
2.5 to 3.5
Carbon (C), % 1.4 to 2.0
0 to 0.1
Chromium (Cr), % 27 to 32
0
Cobalt (Co), % 47.5 to 64.1
0
Hydrogen (H), % 0
0 to 0.015
Iron (Fe), % 0 to 3.0
0 to 0.25
Molybdenum (Mo), % 0 to 1.0
0
Nickel (Ni), % 0 to 3.0
0 to 0.050
Oxygen (O), % 0
0 to 0.15
Palladium (Pd), % 0
0.040 to 0.080
Silicon (Si), % 0 to 2.0
0
Titanium (Ti), % 0
92.5 to 95.5
Tungsten (W), % 7.5 to 9.5
0
Vanadium (V), % 0
2.0 to 3.0
Residuals, % 0
0 to 0.4