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Titanium 6-2-4-2 vs. S21640 Stainless Steel

Titanium 6-2-4-2 belongs to the titanium alloys classification, while S21640 stainless steel belongs to the iron alloys. There are 30 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 6-2-4-2 and the bottom bar is S21640 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 110
200
Elongation at Break, % 8.6
46
Fatigue Strength, MPa 490
320
Poisson's Ratio 0.32
0.28
Shear Modulus, GPa 40
78
Shear Strength, MPa 560
520
Tensile Strength: Ultimate (UTS), MPa 950
740
Tensile Strength: Yield (Proof), MPa 880
350

Thermal Properties

Latent Heat of Fusion, J/g 400
290
Maximum Temperature: Mechanical, °C 300
940
Melting Completion (Liquidus), °C 1590
1430
Melting Onset (Solidus), °C 1540
1380
Specific Heat Capacity, J/kg-K 540
480
Thermal Conductivity, W/m-K 6.9
15
Thermal Expansion, µm/m-K 9.5
17

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 0.9
2.4
Electrical Conductivity: Equal Weight (Specific), % IACS 1.8
2.8

Otherwise Unclassified Properties

Base Metal Price, % relative 42
17
Density, g/cm3 4.6
7.7
Embodied Carbon, kg CO2/kg material 32
3.6
Embodied Energy, MJ/kg 520
51
Embodied Water, L/kg 210
150

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 79
280
Resilience: Unit (Modulus of Resilience), kJ/m3 3640
300
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 34
25
Strength to Weight: Axial, points 57
27
Strength to Weight: Bending, points 46
23
Thermal Diffusivity, mm2/s 2.8
4.0
Thermal Shock Resistance, points 67
16

Alloy Composition

Aluminum (Al), % 5.5 to 6.5
0
Carbon (C), % 0 to 0.050
0 to 0.080
Chromium (Cr), % 0
17.5 to 19.5
Hydrogen (H), % 0 to 0.015
0
Iron (Fe), % 0 to 0.25
63 to 74.3
Manganese (Mn), % 0
3.5 to 6.5
Molybdenum (Mo), % 1.8 to 2.2
0.5 to 2.0
Nickel (Ni), % 0
4.0 to 6.5
Niobium (Nb), % 0
0.1 to 1.0
Nitrogen (N), % 0 to 0.050
0.080 to 0.3
Oxygen (O), % 0 to 0.15
0
Phosphorus (P), % 0
0 to 0.060
Silicon (Si), % 0.060 to 0.12
0 to 1.0
Sulfur (S), % 0
0 to 0.030
Tin (Sn), % 1.8 to 2.2
0
Titanium (Ti), % 83.7 to 87.2
0
Zirconium (Zr), % 3.6 to 4.4
0
Residuals, % 0 to 0.4
0