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Grade 38 Titanium vs. Grade 20 Titanium

Both grade 38 titanium and grade 20 titanium are titanium alloys. They have 80% of their average alloy composition in common. There are 26 material properties with values for both materials. Properties with values for just one material (5, in this case) are not shown.

For each property being compared, the top bar is grade 38 titanium and the bottom bar is grade 20 titanium.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 110
120
Elongation at Break, % 11
5.7 to 17
Fatigue Strength, MPa 530
550 to 630
Poisson's Ratio 0.32
0.32
Reduction in Area, % 29
23
Shear Modulus, GPa 40
47
Shear Strength, MPa 600
560 to 740
Tensile Strength: Ultimate (UTS), MPa 1000
900 to 1270
Tensile Strength: Yield (Proof), MPa 910
850 to 1190

Thermal Properties

Latent Heat of Fusion, J/g 410
400
Maximum Temperature: Mechanical, °C 330
370
Melting Completion (Liquidus), °C 1620
1660
Melting Onset (Solidus), °C 1570
1600
Specific Heat Capacity, J/kg-K 550
520
Thermal Expansion, µm/m-K 9.3
9.6

Otherwise Unclassified Properties

Density, g/cm3 4.5
5.0
Embodied Carbon, kg CO2/kg material 35
52
Embodied Energy, MJ/kg 560
860
Embodied Water, L/kg 160
350

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 110
71 to 150
Resilience: Unit (Modulus of Resilience), kJ/m3 3840
2940 to 5760
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 35
33
Strength to Weight: Axial, points 62
50 to 70
Strength to Weight: Bending, points 49
41 to 52
Thermal Shock Resistance, points 72
55 to 77

Alloy Composition

Aluminum (Al), % 3.5 to 4.5
3.0 to 4.0
Carbon (C), % 0 to 0.080
0 to 0.050
Chromium (Cr), % 0
5.5 to 6.5
Hydrogen (H), % 0 to 0.015
0 to 0.020
Iron (Fe), % 1.2 to 1.8
0 to 0.3
Molybdenum (Mo), % 0
3.5 to 4.5
Nitrogen (N), % 0 to 0.030
0 to 0.030
Oxygen (O), % 0.2 to 0.3
0 to 0.12
Palladium (Pd), % 0
0.040 to 0.080
Titanium (Ti), % 89.9 to 93.1
71 to 77
Vanadium (V), % 2.0 to 3.0
7.5 to 8.5
Zirconium (Zr), % 0
3.5 to 4.5
Residuals, % 0 to 0.4
0 to 0.4