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AWS ERTi-1 vs. AWS ERTi-2

Both AWS ERTi-1 and AWS ERTi-2 are titanium alloys. Both are furnished in the as-welded condition. Their average alloy composition is basically identical.

For each property being compared, the top bar is AWS ERTi-1 and the bottom bar is AWS ERTi-2.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 110
110
Elongation at Break, % 24
20
Fatigue Strength, MPa 120
190
Poisson's Ratio 0.32
0.32
Shear Modulus, GPa 41
40
Tensile Strength: Ultimate (UTS), MPa 240
340
Tensile Strength: Yield (Proof), MPa 170
280

Thermal Properties

Latent Heat of Fusion, J/g 420
420
Maximum Temperature: Mechanical, °C 320
320
Melting Completion (Liquidus), °C 1670
1670
Melting Onset (Solidus), °C 1620
1620
Specific Heat Capacity, J/kg-K 540
540
Thermal Conductivity, W/m-K 21
21
Thermal Expansion, µm/m-K 8.7
8.7

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 3.6
3.6
Electrical Conductivity: Equal Weight (Specific), % IACS 7.1
7.1

Otherwise Unclassified Properties

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

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 52
64
Resilience: Unit (Modulus of Resilience), kJ/m3 140
360
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 35
35
Strength to Weight: Axial, points 15
21
Strength to Weight: Bending, points 19
24
Thermal Diffusivity, mm2/s 8.7
8.7
Thermal Shock Resistance, points 19
27

Alloy Composition

Carbon (C), % 0 to 0.030
0 to 0.030
Hydrogen (H), % 0 to 0.0050
0 to 0.0080
Iron (Fe), % 0 to 0.080
0 to 0.12
Nitrogen (N), % 0 to 0.012
0 to 0.015
Oxygen (O), % 0.030 to 0.1
0.080 to 0.16
Titanium (Ti), % 99.773 to 99.97
99.667 to 99.92