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

S31727 stainless steel belongs to the iron alloys classification, while titanium 15-3-3-3 belongs to the titanium 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 S31727 stainless steel and the bottom bar is titanium 15-3-3-3.

Metric UnitsUS Customary Units

Mechanical Properties

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

Thermal Properties

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

Otherwise Unclassified Properties

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

Common Calculations

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

Alloy Composition

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