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Grade 18 Titanium vs. AWS ERTi-1

Both grade 18 titanium and AWS ERTi-1 are titanium alloys. They have a moderately high 94% of their average alloy composition in common. 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 grade 18 titanium and the bottom bar is AWS ERTi-1.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 110
110
Elongation at Break, % 11 to 17
24
Fatigue Strength, MPa 330 to 480
120
Poisson's Ratio 0.32
0.32
Shear Modulus, GPa 40
41
Tensile Strength: Ultimate (UTS), MPa 690 to 980
240
Tensile Strength: Yield (Proof), MPa 540 to 810
170

Thermal Properties

Latent Heat of Fusion, J/g 410
420
Maximum Temperature: Mechanical, °C 330
320
Melting Completion (Liquidus), °C 1640
1670
Melting Onset (Solidus), °C 1590
1620
Specific Heat Capacity, J/kg-K 550
540
Thermal Conductivity, W/m-K 8.3
21
Thermal Expansion, µm/m-K 9.9
8.7

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 1.3
3.6
Electrical Conductivity: Equal Weight (Specific), % IACS 2.7
7.1

Otherwise Unclassified Properties

Density, g/cm3 4.5
4.5
Embodied Carbon, kg CO2/kg material 41
31
Embodied Energy, MJ/kg 670
510
Embodied Water, L/kg 270
110

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 87 to 110
52
Resilience: Unit (Modulus of Resilience), kJ/m3 1380 to 3110
140
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 35
35
Strength to Weight: Axial, points 43 to 61
15
Strength to Weight: Bending, points 39 to 49
19
Thermal Diffusivity, mm2/s 3.4
8.7
Thermal Shock Resistance, points 47 to 67
19

Alloy Composition


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Aluminum (Al), % 2.5 to 3.5
0
Carbon (C), % 0 to 0.080
0 to 0.030
Hydrogen (H), % 0 to 0.015
0 to 0.0050
Iron (Fe), % 0 to 0.25
0 to 0.080
Nitrogen (N), % 0 to 0.030
0 to 0.012
Oxygen (O), % 0 to 0.15
0.030 to 0.1
Palladium (Pd), % 0.040 to 0.080
0
Titanium (Ti), % 92.5 to 95.5
99.773 to 99.97
Vanadium (V), % 2.0 to 3.0
0
Residuals, % 0 to 0.4
0