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Grade 38 Titanium vs. R30003 Cobalt

Grade 38 titanium belongs to the titanium alloys classification, while R30003 cobalt belongs to the cobalt alloys. There are 27 material properties with values for both materials. Properties with values for just one material (4, in this case) are not shown.

For each property being compared, the top bar is grade 38 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
10 to 73
Fatigue Strength, MPa 530
320 to 560
Poisson's Ratio 0.32
0.29
Shear Modulus, GPa 40
83
Tensile Strength: Ultimate (UTS), MPa 1000
970 to 1720
Tensile Strength: Yield (Proof), MPa 910
510 to 1090

Thermal Properties

Latent Heat of Fusion, J/g 410
310
Melting Completion (Liquidus), °C 1620
1400
Melting Onset (Solidus), °C 1570
1440
Specific Heat Capacity, J/kg-K 550
450
Thermal Conductivity, W/m-K 8.0
13
Thermal Expansion, µm/m-K 9.3
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 1.2
2.0
Electrical Conductivity: Equal Weight (Specific), % IACS 2.4
2.1

Otherwise Unclassified Properties

Base Metal Price, % relative 36
95
Density, g/cm3 4.5
8.4
Embodied Carbon, kg CO2/kg material 35
8.0
Embodied Energy, MJ/kg 560
110
Embodied Water, L/kg 160
400

Common Calculations

Resilience: Unit (Modulus of Resilience), kJ/m3 3840
600 to 2790
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 35
24
Strength to Weight: Axial, points 62
32 to 57
Strength to Weight: Bending, points 49
26 to 38
Thermal Diffusivity, mm2/s 3.2
3.3
Thermal Shock Resistance, points 72
26 to 45

Alloy Composition


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Aluminum (Al), % 3.5 to 4.5
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), % 1.2 to 1.8
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), % 0.2 to 0.3
0
Phosphorus (P), % 0
0 to 0.015
Silicon (Si), % 0
0 to 1.2
Sulfur (S), % 0
0 to 0.015
Titanium (Ti), % 89.9 to 93.1
0
Vanadium (V), % 2.0 to 3.0
0
Residuals, % 0 to 0.4
0