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Grade 33 Titanium vs. Grade 21 Titanium

Both grade 33 titanium and grade 21 titanium are titanium alloys. They have 79% of their average alloy composition in common. There are 29 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 33 titanium and the bottom bar is grade 21 titanium.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 110
140
Elongation at Break, % 23
9.0 to 17
Fatigue Strength, MPa 250
550 to 660
Poisson's Ratio 0.32
0.32
Reduction in Area, % 34
22
Shear Modulus, GPa 41
51
Shear Strength, MPa 240
550 to 790
Tensile Strength: Ultimate (UTS), MPa 390
890 to 1340
Tensile Strength: Yield (Proof), MPa 350
870 to 1170

Thermal Properties

Latent Heat of Fusion, J/g 420
410
Maximum Temperature: Mechanical, °C 320
310
Melting Completion (Liquidus), °C 1660
1740
Melting Onset (Solidus), °C 1610
1690
Specific Heat Capacity, J/kg-K 540
500
Thermal Conductivity, W/m-K 21
7.5
Thermal Expansion, µm/m-K 8.7
7.1

Otherwise Unclassified Properties

Base Metal Price, % relative 55
60
Density, g/cm3 4.5
5.4
Embodied Carbon, kg CO2/kg material 33
32
Embodied Energy, MJ/kg 530
490
Embodied Water, L/kg 200
180

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 86
110 to 180
Resilience: Unit (Modulus of Resilience), kJ/m3 590
2760 to 5010
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 35
32
Strength to Weight: Axial, points 24
46 to 69
Strength to Weight: Bending, points 26
38 to 50
Thermal Diffusivity, mm2/s 8.7
2.8
Thermal Shock Resistance, points 30
66 to 100

Alloy Composition

Aluminum (Al), % 0
2.5 to 3.5
Carbon (C), % 0 to 0.080
0 to 0.050
Chromium (Cr), % 0.1 to 0.2
0
Hydrogen (H), % 0 to 0.015
0 to 0.015
Iron (Fe), % 0 to 0.3
0 to 0.4
Molybdenum (Mo), % 0
14 to 16
Nickel (Ni), % 0.35 to 0.55
0
Niobium (Nb), % 0
2.2 to 3.2
Nitrogen (N), % 0 to 0.030
0 to 0.030
Oxygen (O), % 0 to 0.25
0 to 0.17
Palladium (Pd), % 0.010 to 0.020
0
Ruthenium (Ru), % 0.020 to 0.040
0
Silicon (Si), % 0
0.15 to 0.25
Titanium (Ti), % 98.1 to 99.52
76 to 81.2
Residuals, % 0
0 to 0.4