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Titanium 15-3-3-3 vs. Grade 21 Titanium

Both titanium 15-3-3-3 and grade 21 titanium are titanium alloys. They have 79% of their average alloy composition in common. There are 27 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 titanium 15-3-3-3 and the bottom bar is grade 21 titanium.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 100
140
Elongation at Break, % 5.7 to 8.0
9.0 to 17
Fatigue Strength, MPa 610 to 710
550 to 660
Poisson's Ratio 0.33
0.32
Shear Modulus, GPa 39
51
Shear Strength, MPa 660 to 810
550 to 790
Tensile Strength: Ultimate (UTS), MPa 1120 to 1390
890 to 1340
Tensile Strength: Yield (Proof), MPa 1100 to 1340
870 to 1170

Thermal Properties

Latent Heat of Fusion, J/g 390
410
Maximum Temperature: Mechanical, °C 430
310
Melting Completion (Liquidus), °C 1620
1740
Melting Onset (Solidus), °C 1560
1690
Specific Heat Capacity, J/kg-K 520
500
Thermal Conductivity, W/m-K 8.1
7.5
Thermal Expansion, µm/m-K 9.8
7.1

Otherwise Unclassified Properties

Base Metal Price, % relative 40
60
Density, g/cm3 4.8
5.4
Embodied Carbon, kg CO2/kg material 59
32
Embodied Energy, MJ/kg 950
490
Embodied Water, L/kg 260
180

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 78 to 89
110 to 180
Stiffness to Weight: Axial, points 12
14
Stiffness to Weight: Bending, points 32
32
Strength to Weight: Axial, points 64 to 80
46 to 69
Strength to Weight: Bending, points 50 to 57
38 to 50
Thermal Diffusivity, mm2/s 3.2
2.8
Thermal Shock Resistance, points 79 to 98
66 to 100

Alloy Composition


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Aluminum (Al), % 2.5 to 3.5
2.5 to 3.5
Carbon (C), % 0 to 0.050
0 to 0.050
Chromium (Cr), % 2.5 to 3.5
0
Hydrogen (H), % 0 to 0.015
0 to 0.015
Iron (Fe), % 0 to 0.25
0 to 0.4
Molybdenum (Mo), % 0
14 to 16
Niobium (Nb), % 0
2.2 to 3.2
Nitrogen (N), % 0 to 0.050
0 to 0.030
Oxygen (O), % 0 to 0.13
0 to 0.17
Silicon (Si), % 0
0.15 to 0.25
Tin (Sn), % 2.5 to 3.5
0
Titanium (Ti), % 72.6 to 78.5
76 to 81.2
Vanadium (V), % 14 to 16
0
Residuals, % 0 to 0.4
0 to 0.4

Comparable Variants