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Grade 23 Titanium vs. S32550 Stainless Steel

Grade 23 titanium belongs to the titanium alloys classification, while S32550 stainless steel belongs to the iron alloys. There are 32 material properties with values for both materials. Properties with values for just one material (3, in this case) are not shown.

For each property being compared, the top bar is grade 23 titanium and the bottom bar is S32550 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 110
200
Elongation at Break, % 6.7 to 11
21
Fatigue Strength, MPa 470 to 500
400
Poisson's Ratio 0.32
0.27
Reduction in Area, % 30
57
Rockwell C Hardness 32
28
Shear Modulus, GPa 40
80
Shear Strength, MPa 540 to 570
540
Tensile Strength: Ultimate (UTS), MPa 930 to 940
860
Tensile Strength: Yield (Proof), MPa 850 to 870
620

Thermal Properties

Latent Heat of Fusion, J/g 410
300
Maximum Temperature: Mechanical, °C 340
1100
Melting Completion (Liquidus), °C 1610
1440
Melting Onset (Solidus), °C 1560
1390
Specific Heat Capacity, J/kg-K 560
480
Thermal Conductivity, W/m-K 7.1
16
Thermal Expansion, µm/m-K 9.4
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 1.0
2.2
Electrical Conductivity: Equal Weight (Specific), % IACS 2.0
2.5

Otherwise Unclassified Properties

Base Metal Price, % relative 36
20
Density, g/cm3 4.4
7.8
Embodied Carbon, kg CO2/kg material 38
3.8
Embodied Energy, MJ/kg 610
53
Embodied Water, L/kg 200
180

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 61 to 100
160
Resilience: Unit (Modulus of Resilience), kJ/m3 3430 to 3560
940
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 35
25
Strength to Weight: Axial, points 58 to 59
31
Strength to Weight: Bending, points 48
26
Thermal Diffusivity, mm2/s 2.9
4.4
Thermal Shock Resistance, points 67 to 68
23

Alloy Composition

Aluminum (Al), % 5.5 to 6.5
0
Carbon (C), % 0 to 0.080
0 to 0.040
Chromium (Cr), % 0
24 to 27
Copper (Cu), % 0
1.5 to 2.5
Hydrogen (H), % 0 to 0.013
0
Iron (Fe), % 0 to 0.25
57.2 to 67
Manganese (Mn), % 0
0 to 1.5
Molybdenum (Mo), % 0
2.9 to 3.9
Nickel (Ni), % 0
4.5 to 6.5
Nitrogen (N), % 0 to 0.030
0.1 to 0.25
Oxygen (O), % 0 to 0.13
0
Phosphorus (P), % 0
0 to 0.040
Silicon (Si), % 0
0 to 1.0
Sulfur (S), % 0
0 to 0.030
Titanium (Ti), % 88.1 to 91
0
Vanadium (V), % 3.5 to 4.5
0
Residuals, % 0 to 0.4
0