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AWS ERTi-5 vs. R30003 Cobalt

AWS ERTi-5 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 (2, in this case) are not shown.

For each property being compared, the top bar is AWS ERTi-5 and the bottom bar is R30003 cobalt.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 110
210
Elongation at Break, % 10
10 to 73
Fatigue Strength, MPa 470
320 to 560
Poisson's Ratio 0.32
0.29
Shear Modulus, GPa 40
83
Tensile Strength: Ultimate (UTS), MPa 900
970 to 1720
Tensile Strength: Yield (Proof), MPa 830
510 to 1090

Thermal Properties

Latent Heat of Fusion, J/g 410
310
Melting Completion (Liquidus), °C 1610
1400
Melting Onset (Solidus), °C 1560
1440
Specific Heat Capacity, J/kg-K 560
450
Thermal Conductivity, W/m-K 7.1
13
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

Base Metal Price, % relative 36
95
Density, g/cm3 4.4
8.4
Embodied Carbon, kg CO2/kg material 38
8.0
Embodied Energy, MJ/kg 610
110
Embodied Water, L/kg 200
400

Common Calculations

Resilience: Unit (Modulus of Resilience), kJ/m3 3250
600 to 2790
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 35
24
Strength to Weight: Axial, points 56
32 to 57
Strength to Weight: Bending, points 46
26 to 38
Thermal Diffusivity, mm2/s 2.9
3.3
Thermal Shock Resistance, points 63
26 to 45

Alloy Composition

Aluminum (Al), % 5.5 to 6.8
0
Boron (B), % 0
0 to 0.1
Carbon (C), % 0 to 0.050
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), % 0 to 0.22
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), % 0.12 to 0.2
0
Phosphorus (P), % 0
0 to 0.015
Silicon (Si), % 0
0 to 1.2
Sulfur (S), % 0
0 to 0.015
Titanium (Ti), % 88.2 to 90.9
0
Vanadium (V), % 3.5 to 4.5
0