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AWS ERTi-2 vs. AWS ERTi-5

Both AWS ERTi-2 and AWS ERTi-5 are titanium alloys. Both are furnished in the as-welded condition. They have 90% of their average alloy composition in common.

For each property being compared, the top bar is AWS ERTi-2 and the bottom bar is AWS ERTi-5.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 110
110
Elongation at Break, % 20
10
Fatigue Strength, MPa 190
470
Poisson's Ratio 0.32
0.32
Shear Modulus, GPa 40
40
Tensile Strength: Ultimate (UTS), MPa 340
900
Tensile Strength: Yield (Proof), MPa 280
830

Thermal Properties

Latent Heat of Fusion, J/g 420
410
Maximum Temperature: Mechanical, °C 320
340
Melting Completion (Liquidus), °C 1670
1610
Melting Onset (Solidus), °C 1620
1560
Specific Heat Capacity, J/kg-K 540
560
Thermal Conductivity, W/m-K 21
7.1
Thermal Expansion, µm/m-K 8.7
9.6

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 3.6
1.0
Electrical Conductivity: Equal Weight (Specific), % IACS 7.1
2.0

Otherwise Unclassified Properties

Base Metal Price, % relative 37
36
Density, g/cm3 4.5
4.4
Embodied Carbon, kg CO2/kg material 31
38
Embodied Energy, MJ/kg 510
610
Embodied Water, L/kg 110
200

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 64
87
Resilience: Unit (Modulus of Resilience), kJ/m3 360
3250
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 35
35
Strength to Weight: Axial, points 21
56
Strength to Weight: Bending, points 24
46
Thermal Diffusivity, mm2/s 8.7
2.9
Thermal Shock Resistance, points 27
63

Alloy Composition

Aluminum (Al), % 0
5.5 to 6.8
Carbon (C), % 0 to 0.030
0 to 0.050
Hydrogen (H), % 0 to 0.0080
0 to 0.015
Iron (Fe), % 0 to 0.12
0 to 0.22
Nitrogen (N), % 0 to 0.015
0 to 0.030
Oxygen (O), % 0.080 to 0.16
0.12 to 0.2
Titanium (Ti), % 99.667 to 99.92
88.2 to 90.9
Vanadium (V), % 0
3.5 to 4.5