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Grade 35 Titanium vs. Grade 18 Titanium

Both grade 35 titanium and grade 18 titanium are titanium alloys. They have a very high 96% of their average alloy composition in common. There are 30 material properties with values for both materials. Properties with values for just one material (1, in this case) are not shown.

For each property being compared, the top bar is grade 35 titanium and the bottom bar is grade 18 titanium.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 110
110
Elongation at Break, % 5.6
11 to 17
Fatigue Strength, MPa 330
330 to 480
Poisson's Ratio 0.32
0.32
Reduction in Area, % 23
23
Shear Modulus, GPa 41
40
Shear Strength, MPa 580
420 to 590
Tensile Strength: Ultimate (UTS), MPa 1000
690 to 980
Tensile Strength: Yield (Proof), MPa 630
540 to 810

Thermal Properties

Latent Heat of Fusion, J/g 420
410
Maximum Temperature: Mechanical, °C 320
330
Melting Completion (Liquidus), °C 1630
1640
Melting Onset (Solidus), °C 1580
1590
Specific Heat Capacity, J/kg-K 550
550
Thermal Conductivity, W/m-K 7.4
8.3
Thermal Expansion, µm/m-K 9.3
9.9

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 1.1
1.3
Electrical Conductivity: Equal Weight (Specific), % IACS 2.2
2.7

Otherwise Unclassified Properties

Density, g/cm3 4.6
4.5
Embodied Carbon, kg CO2/kg material 33
41
Embodied Energy, MJ/kg 530
670
Embodied Water, L/kg 170
270

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 49
87 to 110
Resilience: Unit (Modulus of Resilience), kJ/m3 1830
1380 to 3110
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 35
35
Strength to Weight: Axial, points 61
43 to 61
Strength to Weight: Bending, points 49
39 to 49
Thermal Diffusivity, mm2/s 3.0
3.4
Thermal Shock Resistance, points 70
47 to 67

Alloy Composition

Aluminum (Al), % 4.0 to 5.0
2.5 to 3.5
Carbon (C), % 0 to 0.080
0 to 0.080
Hydrogen (H), % 0 to 0.015
0 to 0.015
Iron (Fe), % 0.2 to 0.8
0 to 0.25
Molybdenum (Mo), % 1.5 to 2.5
0
Nitrogen (N), % 0 to 0.050
0 to 0.030
Oxygen (O), % 0 to 0.25
0 to 0.15
Palladium (Pd), % 0
0.040 to 0.080
Silicon (Si), % 0.2 to 0.4
0
Titanium (Ti), % 88.4 to 93
92.5 to 95.5
Vanadium (V), % 1.1 to 2.1
2.0 to 3.0
Residuals, % 0
0 to 0.4