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Grade 27 Titanium vs. Grade C-2 Titanium

Both grade 27 titanium and grade C-2 titanium are titanium alloys. Their average alloy composition is basically identical. There are 29 material properties with values for both materials. Properties with values for just one material (4, in this case) are not shown.

For each property being compared, the top bar is grade 27 titanium and the bottom bar is grade C-2 titanium.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 110
110
Elongation at Break, % 27
17
Fatigue Strength, MPa 170
200
Poisson's Ratio 0.32
0.32
Shear Modulus, GPa 41
40
Tensile Strength: Ultimate (UTS), MPa 270
390
Tensile Strength: Yield (Proof), MPa 230
310

Thermal Properties

Latent Heat of Fusion, J/g 420
420
Maximum Temperature: Mechanical, °C 320
320
Melting Completion (Liquidus), °C 1660
1660
Melting Onset (Solidus), °C 1610
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
3.6
Electrical Conductivity: Equal Weight (Specific), % IACS 7.1
7.1

Otherwise Unclassified Properties

Base Metal Price, % relative 37
37
Density, g/cm3 4.5
4.5
Embodied Carbon, kg CO2/kg material 33
31
Embodied Energy, MJ/kg 530
510
Embodied Water, L/kg 320
110

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 70
61
Resilience: Unit (Modulus of Resilience), kJ/m3 240
460
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 35
35
Strength to Weight: Axial, points 17
24
Strength to Weight: Bending, points 21
26
Thermal Diffusivity, mm2/s 8.8
8.8
Thermal Shock Resistance, points 21
30

Alloy Composition

Carbon (C), % 0 to 0.080
0 to 0.1
Hydrogen (H), % 0 to 0.015
0 to 0.015
Iron (Fe), % 0 to 0.2
0 to 0.2
Nickel (Ni), % 0
0 to 0.050
Nitrogen (N), % 0 to 0.030
0
Oxygen (O), % 0 to 0.18
0 to 0.4
Ruthenium (Ru), % 0.080 to 0.14
0
Titanium (Ti), % 99 to 99.92
98.8 to 100
Residuals, % 0
0 to 0.4