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S31727 Stainless Steel vs. Grade 5 Titanium

S31727 stainless steel belongs to the iron alloys classification, while grade 5 titanium belongs to the titanium alloys. There are 27 material properties with values for both materials. Properties with values for just one material (9, in this case) are not shown.

For each property being compared, the top bar is S31727 stainless steel and the bottom bar is grade 5 titanium.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
110
Elongation at Break, % 40
8.6 to 11
Fatigue Strength, MPa 240
530 to 630
Poisson's Ratio 0.28
0.32
Reduction in Area, % 56
21 to 25
Shear Modulus, GPa 78
40
Shear Strength, MPa 430
600 to 710
Tensile Strength: Ultimate (UTS), MPa 630
1000 to 1190
Tensile Strength: Yield (Proof), MPa 270
910 to 1110

Thermal Properties

Latent Heat of Fusion, J/g 290
410
Maximum Temperature: Mechanical, °C 1010
330
Melting Completion (Liquidus), °C 1440
1610
Melting Onset (Solidus), °C 1390
1650
Specific Heat Capacity, J/kg-K 470
560
Thermal Expansion, µm/m-K 16
8.9

Otherwise Unclassified Properties

Base Metal Price, % relative 24
36
Density, g/cm3 8.0
4.4
Embodied Carbon, kg CO2/kg material 4.7
38
Embodied Energy, MJ/kg 64
610
Embodied Water, L/kg 180
200

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 200
100 to 110
Resilience: Unit (Modulus of Resilience), kJ/m3 190
3980 to 5880
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 24
35
Strength to Weight: Axial, points 22
62 to 75
Strength to Weight: Bending, points 20
50 to 56
Thermal Shock Resistance, points 14
76 to 91

Alloy Composition

Aluminum (Al), % 0
5.5 to 6.8
Carbon (C), % 0 to 0.030
0 to 0.080
Chromium (Cr), % 17.5 to 19
0
Copper (Cu), % 2.8 to 4.0
0
Hydrogen (H), % 0
0 to 0.015
Iron (Fe), % 53.7 to 61.3
0 to 0.4
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 0.2
Phosphorus (P), % 0 to 0.030
0
Silicon (Si), % 0 to 1.0
0
Sulfur (S), % 0 to 0.030
0
Titanium (Ti), % 0
87.4 to 91
Vanadium (V), % 0
3.5 to 4.5
Yttrium (Y), % 0
0 to 0.0050
Residuals, % 0
0 to 0.4