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Grade 9 Titanium vs. S82031 Stainless Steel

Grade 9 titanium belongs to the titanium alloys classification, while S82031 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 9 titanium and the bottom bar is S82031 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 110
200
Elongation at Break, % 11 to 17
39
Fatigue Strength, MPa 330 to 480
490
Poisson's Ratio 0.32
0.28
Shear Modulus, GPa 40
78
Shear Strength, MPa 430 to 580
540
Tensile Strength: Ultimate (UTS), MPa 700 to 960
780
Tensile Strength: Yield (Proof), MPa 540 to 830
570

Thermal Properties

Latent Heat of Fusion, J/g 410
290
Maximum Temperature: Mechanical, °C 330
980
Melting Completion (Liquidus), °C 1640
1430
Melting Onset (Solidus), °C 1590
1390
Specific Heat Capacity, J/kg-K 550
480
Thermal Conductivity, W/m-K 8.1
15
Thermal Expansion, µm/m-K 9.1
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 1.4
2.2
Electrical Conductivity: Equal Weight (Specific), % IACS 2.7
2.5

Otherwise Unclassified Properties

Base Metal Price, % relative 37
13
Density, g/cm3 4.5
7.7
Embodied Carbon, kg CO2/kg material 36
2.8
Embodied Energy, MJ/kg 580
39
Embodied Water, L/kg 150
150

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 89 to 110
280
Resilience: Unit (Modulus of Resilience), kJ/m3 1380 to 3220
820
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 35
25
Strength to Weight: Axial, points 43 to 60
28
Strength to Weight: Bending, points 39 to 48
24
Thermal Diffusivity, mm2/s 3.3
3.9
Thermal Shock Resistance, points 52 to 71
22

Alloy Composition

Aluminum (Al), % 2.5 to 3.5
0
Carbon (C), % 0 to 0.080
0 to 0.050
Chromium (Cr), % 0
19 to 22
Copper (Cu), % 0
0 to 1.0
Hydrogen (H), % 0 to 0.015
0
Iron (Fe), % 0 to 0.25
68 to 78.3
Manganese (Mn), % 0
0 to 2.5
Molybdenum (Mo), % 0
0.6 to 1.4
Nickel (Ni), % 0
2.0 to 4.0
Nitrogen (N), % 0 to 0.030
0.14 to 0.24
Oxygen (O), % 0 to 0.15
0
Phosphorus (P), % 0
0 to 0.040
Silicon (Si), % 0
0 to 0.8
Sulfur (S), % 0
0 to 0.0050
Titanium (Ti), % 92.6 to 95.5
0
Vanadium (V), % 2.0 to 3.0
0
Residuals, % 0 to 0.4
0