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Grade 6 Titanium vs. S21904 Stainless Steel

Grade 6 titanium belongs to the titanium alloys classification, while S21904 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 grade 6 titanium and the bottom bar is S21904 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 100
200
Elongation at Break, % 11
17 to 51
Fatigue Strength, MPa 290
380 to 550
Poisson's Ratio 0.32
0.28
Shear Modulus, GPa 39
78
Shear Strength, MPa 530
510 to 620
Tensile Strength: Ultimate (UTS), MPa 890
700 to 1000
Tensile Strength: Yield (Proof), MPa 840
390 to 910

Thermal Properties

Latent Heat of Fusion, J/g 410
290
Maximum Temperature: Mechanical, °C 310
980
Melting Completion (Liquidus), °C 1580
1400
Melting Onset (Solidus), °C 1530
1350
Specific Heat Capacity, J/kg-K 550
480
Thermal Conductivity, W/m-K 7.8
14
Thermal Expansion, µm/m-K 9.4
17

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 1.2
2.5
Electrical Conductivity: Equal Weight (Specific), % IACS 2.5
2.9

Otherwise Unclassified Properties

Base Metal Price, % relative 36
15
Density, g/cm3 4.5
7.7
Embodied Carbon, kg CO2/kg material 30
3.0
Embodied Energy, MJ/kg 480
43
Embodied Water, L/kg 190
160

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 92
160 to 310
Resilience: Unit (Modulus of Resilience), kJ/m3 3390
380 to 2070
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 35
25
Strength to Weight: Axial, points 55
25 to 36
Strength to Weight: Bending, points 46
23 to 29
Thermal Diffusivity, mm2/s 3.2
3.8
Thermal Shock Resistance, points 65
15 to 21

Alloy Composition

Aluminum (Al), % 4.0 to 6.0
0
Carbon (C), % 0 to 0.080
0 to 0.040
Chromium (Cr), % 0
19 to 21.5
Hydrogen (H), % 0 to 0.015
0
Iron (Fe), % 0 to 0.5
59.5 to 67.4
Manganese (Mn), % 0
8.0 to 10
Nickel (Ni), % 0
5.5 to 7.5
Nitrogen (N), % 0 to 0.030
0.15 to 0.4
Oxygen (O), % 0 to 0.2
0
Phosphorus (P), % 0
0 to 0.045
Silicon (Si), % 0
0 to 1.0
Sulfur (S), % 0
0 to 0.030
Tin (Sn), % 2.0 to 3.0
0
Titanium (Ti), % 89.8 to 94
0
Residuals, % 0 to 0.4
0