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AWS ERTi-1 vs. R31233 Cobalt

AWS ERTi-1 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-1 and the bottom bar is R31233 cobalt.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 110
220
Elongation at Break, % 24
17
Fatigue Strength, MPa 120
220
Poisson's Ratio 0.32
0.29
Shear Modulus, GPa 41
85
Tensile Strength: Ultimate (UTS), MPa 240
1020
Tensile Strength: Yield (Proof), MPa 170
420

Thermal Properties

Latent Heat of Fusion, J/g 420
320
Melting Completion (Liquidus), °C 1670
1350
Melting Onset (Solidus), °C 1620
1330
Specific Heat Capacity, J/kg-K 540
440
Thermal Conductivity, W/m-K 21
12
Thermal Expansion, µm/m-K 8.7
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 3.6
2.0
Electrical Conductivity: Equal Weight (Specific), % IACS 7.1
2.1

Otherwise Unclassified Properties

Density, g/cm3 4.5
8.6
Embodied Carbon, kg CO2/kg material 31
8.4
Embodied Energy, MJ/kg 510
110
Embodied Water, L/kg 110
480

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 52
140
Resilience: Unit (Modulus of Resilience), kJ/m3 140
410
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 35
23
Strength to Weight: Axial, points 15
33
Strength to Weight: Bending, points 19
26
Thermal Diffusivity, mm2/s 8.7
3.2
Thermal Shock Resistance, points 19
25

Alloy Composition

Boron (B), % 0
0 to 0.015
Carbon (C), % 0 to 0.030
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 0.0050
0
Iron (Fe), % 0 to 0.080
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 0.012
0.030 to 0.12
Oxygen (O), % 0.030 to 0.1
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), % 99.773 to 99.97
0
Tungsten (W), % 0
1.0 to 3.0