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Grade 1 Titanium vs. Grade 25 Titanium

Both grade 1 titanium and grade 25 titanium are titanium alloys. Both are furnished in the annealed condition. They have 89% of their average alloy composition in common. There are 30 material properties with values for both materials. Properties with values for just one material (2, in this case) are not shown.

For each property being compared, the top bar is grade 1 titanium and the bottom bar is grade 25 titanium.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 110
110
Elongation at Break, % 28
11
Fatigue Strength, MPa 170
550
Poisson's Ratio 0.32
0.32
Reduction in Area, % 36
29
Shear Modulus, GPa 39
40
Shear Strength, MPa 200
600
Tensile Strength: Ultimate (UTS), MPa 310
1000
Tensile Strength: Yield (Proof), MPa 220
940

Thermal Properties

Latent Heat of Fusion, J/g 420
410
Maximum Temperature: Mechanical, °C 320
340
Melting Completion (Liquidus), °C 1660
1610
Melting Onset (Solidus), °C 1610
1560
Specific Heat Capacity, J/kg-K 540
560
Thermal Conductivity, W/m-K 20
7.1
Thermal Expansion, µm/m-K 8.8
9.6

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 3.7
1.0
Electrical Conductivity: Equal Weight (Specific), % IACS 7.3
2.0

Otherwise Unclassified Properties

Density, g/cm3 4.5
4.5
Embodied Carbon, kg CO2/kg material 31
43
Embodied Energy, MJ/kg 510
700
Embodied Water, L/kg 110
320

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 79
110
Resilience: Unit (Modulus of Resilience), kJ/m3 230
4220
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 35
35
Strength to Weight: Axial, points 19
62
Strength to Weight: Bending, points 23
50
Thermal Diffusivity, mm2/s 8.2
2.8
Thermal Shock Resistance, points 24
71

Alloy Composition

Aluminum (Al), % 0
5.5 to 6.8
Carbon (C), % 0 to 0.080
0 to 0.080
Hydrogen (H), % 0 to 0.015
0 to 0.013
Iron (Fe), % 0 to 0.2
0 to 0.4
Nickel (Ni), % 0
0.3 to 0.8
Nitrogen (N), % 0 to 0.030
0 to 0.050
Oxygen (O), % 0 to 0.18
0 to 0.2
Palladium (Pd), % 0
0.040 to 0.080
Titanium (Ti), % 99.095 to 100
86.7 to 90.6
Vanadium (V), % 0
3.5 to 4.5
Residuals, % 0
0 to 0.4