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AWS ERTi-12 vs. R30075 Cobalt

AWS ERTi-12 belongs to the titanium alloys classification, while R30075 cobalt belongs to the cobalt alloys. There are 27 material properties with values for both materials. Properties with values for just one material (3, in this case) are not shown.

For each property being compared, the top bar is AWS ERTi-12 and the bottom bar is R30075 cobalt.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 110
210 to 250
Elongation at Break, % 12
12
Fatigue Strength, MPa 200
250 to 840
Poisson's Ratio 0.32
0.29
Shear Modulus, GPa 41
82 to 98
Tensile Strength: Ultimate (UTS), MPa 480
780 to 1280
Tensile Strength: Yield (Proof), MPa 340
480 to 840

Thermal Properties

Latent Heat of Fusion, J/g 420
320
Melting Completion (Liquidus), °C 1670
1360
Melting Onset (Solidus), °C 1620
1290
Specific Heat Capacity, J/kg-K 540
450
Thermal Conductivity, W/m-K 21
13
Thermal Expansion, µm/m-K 8.7
12

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
8.4
Embodied Carbon, kg CO2/kg material 31
8.1
Embodied Energy, MJ/kg 510
110
Embodied Water, L/kg 110
530

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 52
84 to 140
Resilience: Unit (Modulus of Resilience), kJ/m3 550
560 to 1410
Stiffness to Weight: Axial, points 13
14 to 17
Stiffness to Weight: Bending, points 35
24 to 25
Strength to Weight: Axial, points 30
26 to 42
Strength to Weight: Bending, points 30
22 to 31
Thermal Diffusivity, mm2/s 8.7
3.5
Thermal Shock Resistance, points 37
21 to 29

Alloy Composition

Aluminum (Al), % 0
0 to 0.1
Boron (B), % 0
0 to 0.010
Carbon (C), % 0 to 0.030
0 to 0.35
Chromium (Cr), % 0
27 to 30
Cobalt (Co), % 0
58.7 to 68
Hydrogen (H), % 0 to 0.0080
0
Iron (Fe), % 0 to 0.15
0 to 0.75
Manganese (Mn), % 0
0 to 1.0
Molybdenum (Mo), % 0.2 to 0.4
5.0 to 7.0
Nickel (Ni), % 0.060 to 0.090
0 to 0.5
Nitrogen (N), % 0 to 0.015
0 to 0.25
Oxygen (O), % 0.080 to 0.16
0
Phosphorus (P), % 0
0 to 0.020
Silicon (Si), % 0
0 to 1.0
Sulfur (S), % 0
0 to 0.010
Titanium (Ti), % 99.147 to 99.66
0 to 0.1
Tungsten (W), % 0
0 to 0.2