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AWS ERTi-2 vs. R30008 Cobalt

AWS ERTi-2 belongs to the titanium alloys classification, while R30008 cobalt belongs to the cobalt alloys. There are 23 material properties with values for both materials. Properties with values for just one material (6, in this case) are not shown.

For each property being compared, the top bar is AWS ERTi-2 and the bottom bar is R30008 cobalt.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 110
210
Elongation at Break, % 20
1.1 to 73
Fatigue Strength, MPa 190
320 to 530
Poisson's Ratio 0.32
0.29
Shear Modulus, GPa 40
83
Tensile Strength: Ultimate (UTS), MPa 340
950 to 1700
Tensile Strength: Yield (Proof), MPa 280
500 to 1080

Thermal Properties

Latent Heat of Fusion, J/g 420
320
Melting Completion (Liquidus), °C 1670
1400
Melting Onset (Solidus), °C 1620
1330
Specific Heat Capacity, J/kg-K 540
450
Thermal Expansion, µm/m-K 8.7
13

Otherwise Unclassified Properties

Base Metal Price, % relative 37
95
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
400

Common Calculations

Resilience: Unit (Modulus of Resilience), kJ/m3 360
590 to 2720
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 35
24
Strength to Weight: Axial, points 21
31 to 56
Strength to Weight: Bending, points 24
25 to 37
Thermal Shock Resistance, points 27
25 to 44

Alloy Composition

Boron (B), % 0
0 to 0.0010
Carbon (C), % 0 to 0.030
0 to 0.15
Chromium (Cr), % 0
18.5 to 21.5
Cobalt (Co), % 0
39 to 42
Hydrogen (H), % 0 to 0.0080
0
Iron (Fe), % 0 to 0.12
7.6 to 20
Manganese (Mn), % 0
1.0 to 2.0
Molybdenum (Mo), % 0
6.5 to 7.5
Nickel (Ni), % 0
15 to 18
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