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AWS ERTi-5 vs. R31233 Cobalt

AWS ERTi-5 belongs to the titanium alloys classification, while R31233 cobalt belongs to the cobalt alloys. There are 27 material properties with values for both materials. Properties with values for just one material (2, in this case) are not shown.

For each property being compared, the top bar is AWS ERTi-5 and the bottom bar is R31233 cobalt.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 110
220
Elongation at Break, % 10
17
Fatigue Strength, MPa 470
220
Poisson's Ratio 0.32
0.29
Shear Modulus, GPa 40
85
Tensile Strength: Ultimate (UTS), MPa 900
1020
Tensile Strength: Yield (Proof), MPa 830
420

Thermal Properties

Latent Heat of Fusion, J/g 410
320
Melting Completion (Liquidus), °C 1610
1350
Melting Onset (Solidus), °C 1560
1330
Specific Heat Capacity, J/kg-K 560
440
Thermal Conductivity, W/m-K 7.1
12
Thermal Expansion, µm/m-K 9.6
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 1.0
2.0
Electrical Conductivity: Equal Weight (Specific), % IACS 2.0
2.1

Otherwise Unclassified Properties

Density, g/cm3 4.4
8.6
Embodied Carbon, kg CO2/kg material 38
8.4
Embodied Energy, MJ/kg 610
110
Embodied Water, L/kg 200
480

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 87
140
Resilience: Unit (Modulus of Resilience), kJ/m3 3250
410
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 35
23
Strength to Weight: Axial, points 56
33
Strength to Weight: Bending, points 46
26
Thermal Diffusivity, mm2/s 2.9
3.2
Thermal Shock Resistance, points 63
25

Alloy Composition

Aluminum (Al), % 5.5 to 6.8
0
Boron (B), % 0
0 to 0.015
Carbon (C), % 0 to 0.050
0.020 to 0.1
Chromium (Cr), % 0
23.5 to 27.5
Cobalt (Co), % 0
44.7 to 63.3
Hydrogen (H), % 0 to 0.015
0
Iron (Fe), % 0 to 0.22
1.0 to 5.0
Manganese (Mn), % 0
0.1 to 1.5
Molybdenum (Mo), % 0
4.0 to 6.0
Nickel (Ni), % 0
7.0 to 11
Nitrogen (N), % 0 to 0.030
0.030 to 0.12
Oxygen (O), % 0.12 to 0.2
0
Phosphorus (P), % 0
0 to 0.030
Silicon (Si), % 0
0.050 to 1.0
Sulfur (S), % 0
0 to 0.020
Titanium (Ti), % 88.2 to 90.9
0
Tungsten (W), % 0
1.0 to 3.0
Vanadium (V), % 3.5 to 4.5
0