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Titanium 6-2-4-2 vs. Grade 21 Titanium

Both titanium 6-2-4-2 and grade 21 titanium are titanium alloys. They have 84% 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 titanium 6-2-4-2 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, % 8.6
9.0 to 17
Fatigue Strength, MPa 490
550 to 660
Poisson's Ratio 0.32
0.32
Reduction in Area, % 21
22
Shear Modulus, GPa 40
51
Shear Strength, MPa 560
550 to 790
Tensile Strength: Ultimate (UTS), MPa 950
890 to 1340
Tensile Strength: Yield (Proof), MPa 880
870 to 1170

Thermal Properties

Latent Heat of Fusion, J/g 400
410
Maximum Temperature: Mechanical, °C 300
310
Melting Completion (Liquidus), °C 1590
1740
Melting Onset (Solidus), °C 1540
1690
Specific Heat Capacity, J/kg-K 540
500
Thermal Conductivity, W/m-K 6.9
7.5
Thermal Expansion, µm/m-K 9.5
7.1

Otherwise Unclassified Properties

Base Metal Price, % relative 42
60
Density, g/cm3 4.6
5.4
Embodied Carbon, kg CO2/kg material 32
32
Embodied Energy, MJ/kg 520
490
Embodied Water, L/kg 210
180

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 79
110 to 180
Resilience: Unit (Modulus of Resilience), kJ/m3 3640
2760 to 5010
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 34
32
Strength to Weight: Axial, points 57
46 to 69
Strength to Weight: Bending, points 46
38 to 50
Thermal Diffusivity, mm2/s 2.8
2.8
Thermal Shock Resistance, points 67
66 to 100

Alloy Composition

Aluminum (Al), % 5.5 to 6.5
2.5 to 3.5
Carbon (C), % 0 to 0.050
0 to 0.050
Hydrogen (H), % 0 to 0.015
0 to 0.015
Iron (Fe), % 0 to 0.25
0 to 0.4
Molybdenum (Mo), % 1.8 to 2.2
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 0.15
0 to 0.17
Silicon (Si), % 0.060 to 0.12
0.15 to 0.25
Tin (Sn), % 1.8 to 2.2
0
Titanium (Ti), % 83.7 to 87.2
76 to 81.2
Zirconium (Zr), % 3.6 to 4.4
0
Residuals, % 0 to 0.4
0 to 0.4