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Titanium 15-3-3-3 vs. S31727 Stainless Steel

Titanium 15-3-3-3 belongs to the titanium alloys classification, while S31727 stainless steel belongs to the iron alloys. There are 25 material properties with values for both materials. Properties with values for just one material (10, in this case) are not shown.

For each property being compared, the top bar is titanium 15-3-3-3 and the bottom bar is S31727 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 100
200
Elongation at Break, % 5.7 to 8.0
40
Fatigue Strength, MPa 610 to 710
240
Poisson's Ratio 0.33
0.28
Shear Modulus, GPa 39
78
Shear Strength, MPa 660 to 810
430
Tensile Strength: Ultimate (UTS), MPa 1120 to 1390
630
Tensile Strength: Yield (Proof), MPa 1100 to 1340
270

Thermal Properties

Latent Heat of Fusion, J/g 390
290
Maximum Temperature: Mechanical, °C 430
1010
Melting Completion (Liquidus), °C 1620
1440
Melting Onset (Solidus), °C 1560
1390
Specific Heat Capacity, J/kg-K 520
470
Thermal Expansion, µm/m-K 9.8
16

Otherwise Unclassified Properties

Base Metal Price, % relative 40
24
Density, g/cm3 4.8
8.0
Embodied Carbon, kg CO2/kg material 59
4.7
Embodied Energy, MJ/kg 950
64
Embodied Water, L/kg 260
180

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 78 to 89
200
Stiffness to Weight: Axial, points 12
14
Stiffness to Weight: Bending, points 32
24
Strength to Weight: Axial, points 64 to 80
22
Strength to Weight: Bending, points 50 to 57
20
Thermal Shock Resistance, points 79 to 98
14

Alloy Composition

Aluminum (Al), % 2.5 to 3.5
0
Carbon (C), % 0 to 0.050
0 to 0.030
Chromium (Cr), % 2.5 to 3.5
17.5 to 19
Copper (Cu), % 0
2.8 to 4.0
Hydrogen (H), % 0 to 0.015
0
Iron (Fe), % 0 to 0.25
53.7 to 61.3
Manganese (Mn), % 0
0 to 1.0
Molybdenum (Mo), % 0
3.8 to 4.5
Nickel (Ni), % 0
14.5 to 16.5
Nitrogen (N), % 0 to 0.050
0.15 to 0.21
Oxygen (O), % 0 to 0.13
0
Phosphorus (P), % 0
0 to 0.030
Silicon (Si), % 0
0 to 1.0
Sulfur (S), % 0
0 to 0.030
Tin (Sn), % 2.5 to 3.5
0
Titanium (Ti), % 72.6 to 78.5
0
Vanadium (V), % 14 to 16
0
Residuals, % 0 to 0.4
0