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Grade 21 Titanium vs. Nickel 22

Grade 21 titanium belongs to the titanium alloys classification, while nickel 22 belongs to the nickel alloys. There are 28 material properties with values for both materials. Properties with values for just one material (3, in this case) are not shown.

For each property being compared, the top bar is grade 21 titanium and the bottom bar is nickel 22.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 140
220
Elongation at Break, % 9.0 to 17
49
Fatigue Strength, MPa 550 to 660
330
Poisson's Ratio 0.32
0.29
Shear Modulus, GPa 51
84
Shear Strength, MPa 550 to 790
560
Tensile Strength: Ultimate (UTS), MPa 890 to 1340
790
Tensile Strength: Yield (Proof), MPa 870 to 1170
360

Thermal Properties

Latent Heat of Fusion, J/g 410
320
Maximum Temperature: Mechanical, °C 310
990
Melting Completion (Liquidus), °C 1740
1390
Melting Onset (Solidus), °C 1690
1360
Specific Heat Capacity, J/kg-K 500
430
Thermal Conductivity, W/m-K 7.5
10
Thermal Expansion, µm/m-K 7.1
11

Otherwise Unclassified Properties

Base Metal Price, % relative 60
70
Density, g/cm3 5.4
8.9
Embodied Carbon, kg CO2/kg material 32
12
Embodied Energy, MJ/kg 490
170
Embodied Water, L/kg 180
300

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 110 to 180
320
Resilience: Unit (Modulus of Resilience), kJ/m3 2760 to 5010
300
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 32
22
Strength to Weight: Axial, points 46 to 69
25
Strength to Weight: Bending, points 38 to 50
21
Thermal Diffusivity, mm2/s 2.8
2.7
Thermal Shock Resistance, points 66 to 100
24

Alloy Composition

Aluminum (Al), % 2.5 to 3.5
0
Carbon (C), % 0 to 0.050
0 to 0.015
Chromium (Cr), % 0
20 to 22.5
Cobalt (Co), % 0
0 to 2.5
Hydrogen (H), % 0 to 0.015
0
Iron (Fe), % 0 to 0.4
2.0 to 6.0
Manganese (Mn), % 0
0 to 0.015
Molybdenum (Mo), % 14 to 16
12.5 to 14.5
Nickel (Ni), % 0
50.8 to 63
Niobium (Nb), % 2.2 to 3.2
0
Nitrogen (N), % 0 to 0.030
0
Oxygen (O), % 0 to 0.17
0
Phosphorus (P), % 0
0 to 0.020
Silicon (Si), % 0.15 to 0.25
0 to 0.080
Sulfur (S), % 0
0 to 0.020
Titanium (Ti), % 76 to 81.2
0
Tungsten (W), % 0
2.5 to 3.5
Vanadium (V), % 0
0 to 0.35
Residuals, % 0 to 0.4
0