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Grade 33 Titanium vs. Grade 9 Titanium

Both grade 33 titanium and grade 9 titanium are titanium alloys. They have a moderately high 95% of their average alloy composition in common.

For each property being compared, the top bar is grade 33 titanium and the bottom bar is grade 9 titanium.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 110
110
Elongation at Break, % 23
11 to 17
Fatigue Strength, MPa 250
330 to 480
Poisson's Ratio 0.32
0.32
Reduction in Area, % 34
28
Shear Modulus, GPa 41
40
Shear Strength, MPa 240
430 to 580
Tensile Strength: Ultimate (UTS), MPa 390
700 to 960
Tensile Strength: Yield (Proof), MPa 350
540 to 830

Thermal Properties

Latent Heat of Fusion, J/g 420
410
Maximum Temperature: Mechanical, °C 320
330
Melting Completion (Liquidus), °C 1660
1640
Melting Onset (Solidus), °C 1610
1590
Specific Heat Capacity, J/kg-K 540
550
Thermal Conductivity, W/m-K 21
8.1
Thermal Expansion, µm/m-K 8.7
9.1

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 3.4
1.4
Electrical Conductivity: Equal Weight (Specific), % IACS 6.9
2.7

Otherwise Unclassified Properties

Base Metal Price, % relative 55
37
Density, g/cm3 4.5
4.5
Embodied Carbon, kg CO2/kg material 33
36
Embodied Energy, MJ/kg 530
580
Embodied Water, L/kg 200
150

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 86
89 to 110
Resilience: Unit (Modulus of Resilience), kJ/m3 590
1380 to 3220
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 35
35
Strength to Weight: Axial, points 24
43 to 60
Strength to Weight: Bending, points 26
39 to 48
Thermal Diffusivity, mm2/s 8.7
3.3
Thermal Shock Resistance, points 30
52 to 71

Alloy Composition

Aluminum (Al), % 0
2.5 to 3.5
Carbon (C), % 0 to 0.080
0 to 0.080
Chromium (Cr), % 0.1 to 0.2
0
Hydrogen (H), % 0 to 0.015
0 to 0.015
Iron (Fe), % 0 to 0.3
0 to 0.25
Nickel (Ni), % 0.35 to 0.55
0
Nitrogen (N), % 0 to 0.030
0 to 0.030
Oxygen (O), % 0 to 0.25
0 to 0.15
Palladium (Pd), % 0.010 to 0.020
0
Ruthenium (Ru), % 0.020 to 0.040
0
Titanium (Ti), % 98.1 to 99.52
92.6 to 95.5
Vanadium (V), % 0
2.0 to 3.0
Residuals, % 0
0 to 0.4