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Grade 1 Titanium vs. Grade 28 Titanium

Both grade 1 titanium and grade 28 titanium are titanium alloys. They have a moderately high 94% of their average alloy composition in common. There are 31 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 1 titanium and the bottom bar is grade 28 titanium.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 110
110
Elongation at Break, % 28
11 to 17
Fatigue Strength, MPa 170
330 to 480
Poisson's Ratio 0.32
0.32
Reduction in Area, % 36
22
Shear Modulus, GPa 39
40
Shear Strength, MPa 200
420 to 590
Tensile Strength: Ultimate (UTS), MPa 310
690 to 980
Tensile Strength: Yield (Proof), MPa 220
540 to 810

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 20
8.3
Thermal Expansion, µm/m-K 8.8
9.9

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 3.7
1.3
Electrical Conductivity: Equal Weight (Specific), % IACS 7.3
2.7

Otherwise Unclassified Properties

Base Metal Price, % relative 37
36
Density, g/cm3 4.5
4.5
Embodied Carbon, kg CO2/kg material 31
37
Embodied Energy, MJ/kg 510
600
Embodied Water, L/kg 110
370

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 79
87 to 110
Resilience: Unit (Modulus of Resilience), kJ/m3 230
1370 to 3100
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 35
35
Strength to Weight: Axial, points 19
43 to 61
Strength to Weight: Bending, points 23
39 to 49
Thermal Diffusivity, mm2/s 8.2
3.4
Thermal Shock Resistance, points 24
47 to 66

Alloy Composition

Aluminum (Al), % 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 to 0.2
0 to 0.25
Nitrogen (N), % 0 to 0.030
0 to 0.030
Oxygen (O), % 0 to 0.18
0 to 0.15
Ruthenium (Ru), % 0
0.080 to 0.14
Titanium (Ti), % 99.095 to 100
92.4 to 95.4
Vanadium (V), % 0
2.0 to 3.0
Residuals, % 0
0 to 0.4