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Grade 20 Titanium vs. ASTM B817 Type I

Both grade 20 titanium and ASTM B817 type I are titanium alloys. They have 82% of their average alloy composition in common. There are 25 material properties with values for both materials. Properties with values for just one material (6, in this case) are not shown.

For each property being compared, the top bar is grade 20 titanium and the bottom bar is ASTM B817 type I.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 120
100
Elongation at Break, % 5.7 to 17
4.0 to 13
Fatigue Strength, MPa 550 to 630
360 to 520
Poisson's Ratio 0.32
0.32
Reduction in Area, % 23
5.0 to 29
Shear Modulus, GPa 47
40
Tensile Strength: Ultimate (UTS), MPa 900 to 1270
770 to 960
Tensile Strength: Yield (Proof), MPa 850 to 1190
700 to 860

Thermal Properties

Latent Heat of Fusion, J/g 400
410
Maximum Temperature: Mechanical, °C 370
340
Melting Completion (Liquidus), °C 1660
1600
Melting Onset (Solidus), °C 1600
1550
Specific Heat Capacity, J/kg-K 520
560
Thermal Expansion, µm/m-K 9.6
9.6

Otherwise Unclassified Properties

Density, g/cm3 5.0
4.4
Embodied Carbon, kg CO2/kg material 52
38
Embodied Energy, MJ/kg 860
610
Embodied Water, L/kg 350
200

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 71 to 150
30 to 120
Resilience: Unit (Modulus of Resilience), kJ/m3 2940 to 5760
2310 to 3540
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 33
35
Strength to Weight: Axial, points 50 to 70
48 to 60
Strength to Weight: Bending, points 41 to 52
42 to 49
Thermal Shock Resistance, points 55 to 77
54 to 68

Alloy Composition


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Aluminum (Al), % 3.0 to 4.0
5.5 to 6.8
Carbon (C), % 0 to 0.050
0 to 0.1
Chlorine (Cl), % 0
0 to 0.2
Chromium (Cr), % 5.5 to 6.5
0
Hydrogen (H), % 0 to 0.020
0 to 0.015
Iron (Fe), % 0 to 0.3
0 to 0.4
Molybdenum (Mo), % 3.5 to 4.5
0
Nitrogen (N), % 0 to 0.030
0 to 0.040
Oxygen (O), % 0 to 0.12
0 to 0.3
Palladium (Pd), % 0.040 to 0.080
0
Silicon (Si), % 0
0 to 0.1
Sodium (Na), % 0
0 to 0.2
Titanium (Ti), % 71 to 77
87 to 91
Vanadium (V), % 7.5 to 8.5
3.5 to 4.5
Zirconium (Zr), % 3.5 to 4.5
0
Residuals, % 0 to 0.4
0 to 0.4

Comparable Variants