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R31539 Cobalt vs. Titanium 4-4-2

R31539 cobalt belongs to the cobalt alloys classification, while titanium 4-4-2 belongs to the titanium alloys. There are 26 material properties with values for both materials. Properties with values for just one material (6, in this case) are not shown.

For each property being compared, the top bar is R31539 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, % 13 to 22
10
Fatigue Strength, MPa 310 to 480
590 to 620
Poisson's Ratio 0.29
0.32
Reduction in Area, % 13 to 23
20
Shear Modulus, GPa 86
42
Tensile Strength: Ultimate (UTS), MPa 1000 to 1340
1150 to 1250
Tensile Strength: Yield (Proof), MPa 590 to 940
1030 to 1080

Thermal Properties

Latent Heat of Fusion, J/g 320
410
Melting Completion (Liquidus), °C 1360
1610
Melting Onset (Solidus), °C 1290
1560
Specific Heat Capacity, J/kg-K 450
540
Thermal Conductivity, W/m-K 13
6.7
Thermal Expansion, µm/m-K 13
8.6

Otherwise Unclassified Properties

Density, g/cm3 8.4
4.7
Embodied Carbon, kg CO2/kg material 8.2
30
Embodied Energy, MJ/kg 110
480
Embodied Water, L/kg 530
180

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 140 to 190
110 to 120
Resilience: Unit (Modulus of Resilience), kJ/m3 780 to 2000
4700 to 5160
Stiffness to Weight: Axial, points 15
13
Stiffness to Weight: Bending, points 24
34
Strength to Weight: Axial, points 33 to 44
68 to 74
Strength to Weight: Bending, points 27 to 32
52 to 55
Thermal Diffusivity, mm2/s 3.5
2.6
Thermal Shock Resistance, points 24 to 32
86 to 93

Alloy Composition

Aluminum (Al), % 0.3 to 1.0
3.0 to 5.0
Carbon (C), % 0 to 0.14
0 to 0.080
Chromium (Cr), % 26 to 30
0
Cobalt (Co), % 57.7 to 68.7
0
Hydrogen (H), % 0
0 to 0.015
Iron (Fe), % 0 to 0.75
0 to 0.2
Lanthanum (La), % 0.030 to 0.2
0
Manganese (Mn), % 0 to 1.0
0
Molybdenum (Mo), % 5.0 to 7.0
3.0 to 5.0
Nickel (Ni), % 0 to 1.0
0
Nitrogen (N), % 0 to 0.25
0 to 0.050
Oxygen (O), % 0
0 to 0.25
Silicon (Si), % 0 to 1.0
0.3 to 0.7
Tin (Sn), % 0
1.5 to 2.5
Titanium (Ti), % 0
85.8 to 92.2
Residuals, % 0
0 to 0.4

Comparable Variants