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R30012 Cobalt vs. Titanium 4-4-2

R30012 cobalt belongs to the cobalt alloys classification, while titanium 4-4-2 belongs to the titanium alloys. There are 25 material properties with values for both materials. Properties with values for just one material (8, in this case) are not shown.

For each property being compared, the top bar is R30012 cobalt and the bottom bar is titanium 4-4-2.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 220
110
Elongation at Break, % 1.0
10
Fatigue Strength, MPa 320
590 to 620
Poisson's Ratio 0.28
0.32
Shear Modulus, GPa 86
42
Tensile Strength: Ultimate (UTS), MPa 830
1150 to 1250
Tensile Strength: Yield (Proof), MPa 650
1030 to 1080

Thermal Properties

Latent Heat of Fusion, J/g 320
410
Melting Completion (Liquidus), °C 1470
1610
Melting Onset (Solidus), °C 1280
1560
Specific Heat Capacity, J/kg-K 440
540
Thermal Conductivity, W/m-K 15
6.7
Thermal Expansion, µm/m-K 12
8.6

Otherwise Unclassified Properties

Density, g/cm3 8.8
4.7
Embodied Carbon, kg CO2/kg material 8.3
30
Embodied Energy, MJ/kg 120
480
Embodied Water, L/kg 480
180

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 7.7
110 to 120
Resilience: Unit (Modulus of Resilience), kJ/m3 960
4700 to 5160
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 23
34
Strength to Weight: Axial, points 26
68 to 74
Strength to Weight: Bending, points 22
52 to 55
Thermal Diffusivity, mm2/s 3.8
2.6
Thermal Shock Resistance, points 23
86 to 93

Alloy Composition

Aluminum (Al), % 0
3.0 to 5.0
Carbon (C), % 1.4 to 2.0
0 to 0.080
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 0.2
Molybdenum (Mo), % 0 to 1.0
3.0 to 5.0
Nickel (Ni), % 0 to 3.0
0
Nitrogen (N), % 0
0 to 0.050
Oxygen (O), % 0
0 to 0.25
Silicon (Si), % 0 to 2.0
0.3 to 0.7
Tin (Sn), % 0
1.5 to 2.5
Titanium (Ti), % 0
85.8 to 92.2
Tungsten (W), % 7.5 to 9.5
0
Residuals, % 0
0 to 0.4