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Grade 9 Titanium vs. S32750 Stainless Steel

Grade 9 titanium belongs to the titanium alloys classification, while S32750 stainless steel belongs to the iron alloys. There are 30 material properties with values for both materials. Properties with values for just one material (5, in this case) are not shown.

For each property being compared, the top bar is grade 9 titanium and the bottom bar is S32750 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 110
210
Elongation at Break, % 11 to 17
17
Fatigue Strength, MPa 330 to 480
360
Poisson's Ratio 0.32
0.27
Shear Modulus, GPa 40
81
Shear Strength, MPa 430 to 580
530
Tensile Strength: Ultimate (UTS), MPa 700 to 960
860
Tensile Strength: Yield (Proof), MPa 540 to 830
590

Thermal Properties

Latent Heat of Fusion, J/g 410
300
Maximum Temperature: Mechanical, °C 330
1100
Melting Completion (Liquidus), °C 1640
1450
Melting Onset (Solidus), °C 1590
1400
Specific Heat Capacity, J/kg-K 550
480
Thermal Conductivity, W/m-K 8.1
15
Thermal Expansion, µm/m-K 9.1
12

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
21
Density, g/cm3 4.5
7.8
Embodied Carbon, kg CO2/kg material 36
4.1
Embodied Energy, MJ/kg 580
56
Embodied Water, L/kg 150
180

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 89 to 110
130
Resilience: Unit (Modulus of Resilience), kJ/m3 1380 to 3220
860
Stiffness to Weight: Axial, points 13
15
Stiffness to Weight: Bending, points 35
25
Strength to Weight: Axial, points 43 to 60
31
Strength to Weight: Bending, points 39 to 48
26
Thermal Diffusivity, mm2/s 3.3
4.0
Thermal Shock Resistance, points 52 to 71
25

Alloy Composition

Aluminum (Al), % 2.5 to 3.5
0
Carbon (C), % 0 to 0.080
0 to 0.030
Chromium (Cr), % 0
24 to 26
Copper (Cu), % 0
0 to 0.5
Hydrogen (H), % 0 to 0.015
0
Iron (Fe), % 0 to 0.25
58.1 to 66.8
Manganese (Mn), % 0
0 to 1.2
Molybdenum (Mo), % 0
3.0 to 5.0
Nickel (Ni), % 0
6.0 to 8.0
Nitrogen (N), % 0 to 0.030
0.24 to 0.32
Oxygen (O), % 0 to 0.15
0
Phosphorus (P), % 0
0 to 0.035
Silicon (Si), % 0
0 to 0.8
Sulfur (S), % 0
0 to 0.020
Titanium (Ti), % 92.6 to 95.5
0
Vanadium (V), % 2.0 to 3.0
0
Residuals, % 0 to 0.4
0