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Grade 15 Titanium vs. S32803 Stainless Steel

Grade 15 titanium belongs to the titanium alloys classification, while S32803 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 15 titanium and the bottom bar is S32803 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 110
210
Elongation at Break, % 20
18
Fatigue Strength, MPa 290
350
Poisson's Ratio 0.32
0.27
Shear Modulus, GPa 41
81
Shear Strength, MPa 340
420
Tensile Strength: Ultimate (UTS), MPa 540
680
Tensile Strength: Yield (Proof), MPa 430
560

Thermal Properties

Latent Heat of Fusion, J/g 420
300
Maximum Temperature: Mechanical, °C 320
1100
Melting Completion (Liquidus), °C 1660
1450
Melting Onset (Solidus), °C 1610
1400
Specific Heat Capacity, J/kg-K 540
480
Thermal Conductivity, W/m-K 21
16
Thermal Expansion, µm/m-K 8.7
11

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 3.4
2.3
Electrical Conductivity: Equal Weight (Specific), % IACS 6.7
2.6

Otherwise Unclassified Properties

Base Metal Price, % relative 37
19
Density, g/cm3 4.5
7.7
Embodied Carbon, kg CO2/kg material 32
3.7
Embodied Energy, MJ/kg 520
53
Embodied Water, L/kg 210
180

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 100
120
Resilience: Unit (Modulus of Resilience), kJ/m3 870
760
Stiffness to Weight: Axial, points 13
15
Stiffness to Weight: Bending, points 35
25
Strength to Weight: Axial, points 33
25
Strength to Weight: Bending, points 33
22
Thermal Diffusivity, mm2/s 8.4
4.4
Thermal Shock Resistance, points 41
22

Alloy Composition

Carbon (C), % 0 to 0.080
0 to 0.015
Chromium (Cr), % 0
28 to 29
Hydrogen (H), % 0 to 0.015
0
Iron (Fe), % 0 to 0.3
62.9 to 67.1
Manganese (Mn), % 0
0 to 0.5
Molybdenum (Mo), % 0
1.8 to 2.5
Nickel (Ni), % 0.4 to 0.6
3.0 to 4.0
Niobium (Nb), % 0
0.15 to 0.5
Nitrogen (N), % 0 to 0.050
0 to 0.020
Oxygen (O), % 0 to 0.25
0
Phosphorus (P), % 0
0 to 0.020
Ruthenium (Ru), % 0.040 to 0.060
0
Silicon (Si), % 0
0 to 0.55
Sulfur (S), % 0
0 to 0.0035
Titanium (Ti), % 98.2 to 99.56
0
Residuals, % 0 to 0.4
0