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AWS ERTi-7 vs. Grade 15 Titanium

Both AWS ERTi-7 and grade 15 titanium are titanium alloys. Their average alloy composition is basically identical. There are 28 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-7 and the bottom bar is grade 15 titanium.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 110
110
Elongation at Break, % 20
20
Fatigue Strength, MPa 190
290
Poisson's Ratio 0.32
0.32
Shear Modulus, GPa 40
41
Tensile Strength: Ultimate (UTS), MPa 340
540
Tensile Strength: Yield (Proof), MPa 280
430

Thermal Properties

Latent Heat of Fusion, J/g 420
420
Maximum Temperature: Mechanical, °C 320
320
Melting Completion (Liquidus), °C 1670
1660
Melting Onset (Solidus), °C 1620
1610
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
3.4
Electrical Conductivity: Equal Weight (Specific), % IACS 7.3
6.7

Otherwise Unclassified Properties

Density, g/cm3 4.5
4.5
Embodied Carbon, kg CO2/kg material 47
32
Embodied Energy, MJ/kg 800
520
Embodied Water, L/kg 470
210

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 64
100
Resilience: Unit (Modulus of Resilience), kJ/m3 360
870
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 35
35
Strength to Weight: Axial, points 21
33
Strength to Weight: Bending, points 24
33
Thermal Diffusivity, mm2/s 8.8
8.4
Thermal Shock Resistance, points 26
41

Alloy Composition

Carbon (C), % 0 to 0.030
0 to 0.080
Hydrogen (H), % 0 to 0.0080
0 to 0.015
Iron (Fe), % 0 to 0.12
0 to 0.3
Nickel (Ni), % 0
0.4 to 0.6
Nitrogen (N), % 0 to 0.015
0 to 0.050
Oxygen (O), % 0.080 to 0.16
0 to 0.25
Palladium (Pd), % 0.12 to 0.25
0
Ruthenium (Ru), % 0
0.040 to 0.060
Titanium (Ti), % 99.417 to 99.8
98.2 to 99.56
Residuals, % 0
0 to 0.4