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AWS ERTi-2 vs. R30003 Cobalt

AWS ERTi-2 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-2 and the bottom bar is R30003 cobalt.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 110
210
Elongation at Break, % 20
10 to 73
Fatigue Strength, MPa 190
320 to 560
Poisson's Ratio 0.32
0.29
Shear Modulus, GPa 40
83
Tensile Strength: Ultimate (UTS), MPa 340
970 to 1720
Tensile Strength: Yield (Proof), MPa 280
510 to 1090

Thermal Properties

Latent Heat of Fusion, J/g 420
310
Melting Completion (Liquidus), °C 1670
1400
Melting Onset (Solidus), °C 1620
1440
Specific Heat Capacity, J/kg-K 540
450
Thermal Conductivity, W/m-K 21
13
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

Base Metal Price, % relative 37
95
Density, g/cm3 4.5
8.4
Embodied Carbon, kg CO2/kg material 31
8.0
Embodied Energy, MJ/kg 510
110
Embodied Water, L/kg 110
400

Common Calculations

Resilience: Unit (Modulus of Resilience), kJ/m3 360
600 to 2790
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 35
24
Strength to Weight: Axial, points 21
32 to 57
Strength to Weight: Bending, points 24
26 to 38
Thermal Diffusivity, mm2/s 8.7
3.3
Thermal Shock Resistance, points 27
26 to 45

Alloy Composition

Boron (B), % 0
0 to 0.1
Carbon (C), % 0 to 0.030
0 to 0.15
Chromium (Cr), % 0
19 to 21
Cobalt (Co), % 0
39 to 41
Hydrogen (H), % 0 to 0.0080
0
Iron (Fe), % 0 to 0.12
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 0.015
0
Oxygen (O), % 0.080 to 0.16
0
Phosphorus (P), % 0
0 to 0.015
Silicon (Si), % 0
0 to 1.2
Sulfur (S), % 0
0 to 0.015
Titanium (Ti), % 99.667 to 99.92
0