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AWS ERTi-5 vs. AWS BCo-1

AWS ERTi-5 belongs to the titanium alloys classification, while AWS BCo-1 belongs to the cobalt alloys. There are 18 material properties with values for both materials. Properties with values for just one material (12, in this case) are not shown.

For each property being compared, the top bar is AWS ERTi-5 and the bottom bar is AWS BCo-1.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 110
200
Poisson's Ratio 0.32
0.3
Shear Modulus, GPa 40
78
Tensile Strength: Ultimate (UTS), MPa 900
700

Thermal Properties

Latent Heat of Fusion, J/g 410
420
Melting Completion (Liquidus), °C 1610
1150
Melting Onset (Solidus), °C 1560
1120
Specific Heat Capacity, J/kg-K 560
480
Thermal Expansion, µm/m-K 9.6
12

Otherwise Unclassified Properties

Density, g/cm3 4.4
8.1
Embodied Carbon, kg CO2/kg material 38
8.0
Embodied Energy, MJ/kg 610
110
Embodied Water, L/kg 200
430

Common Calculations

Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 35
24
Strength to Weight: Axial, points 56
24
Strength to Weight: Bending, points 46
22
Thermal Shock Resistance, points 63
21

Alloy Composition

Aluminum (Al), % 5.5 to 6.8
0 to 0.050
Boron (B), % 0
0.7 to 0.9
Carbon (C), % 0 to 0.050
0.35 to 0.45
Chromium (Cr), % 0
18 to 20
Cobalt (Co), % 0
46 to 54
Hydrogen (H), % 0 to 0.015
0
Iron (Fe), % 0 to 0.22
0 to 1.0
Nickel (Ni), % 0
16 to 18
Nitrogen (N), % 0 to 0.030
0
Oxygen (O), % 0.12 to 0.2
0
Phosphorus (P), % 0
0 to 0.020
Selenium (Se), % 0
0 to 0.0050
Silicon (Si), % 0
7.5 to 8.5
Sulfur (S), % 0
0 to 0.020
Titanium (Ti), % 88.2 to 90.9
0 to 0.050
Tungsten (W), % 0
3.5 to 4.5
Vanadium (V), % 3.5 to 4.5
0
Zirconium (Zr), % 0
0 to 0.050
Residuals, % 0
0 to 0.5