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S31727 Stainless Steel vs. Grade 37 Titanium

S31727 stainless steel belongs to the iron alloys classification, while grade 37 titanium belongs to the titanium alloys. There are 27 material properties with values for both materials. Properties with values for just one material (8, in this case) are not shown.

For each property being compared, the top bar is S31727 stainless steel and the bottom bar is grade 37 titanium.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
110
Elongation at Break, % 40
22
Fatigue Strength, MPa 240
170
Poisson's Ratio 0.28
0.32
Reduction in Area, % 56
34
Shear Modulus, GPa 78
40
Shear Strength, MPa 430
240
Tensile Strength: Ultimate (UTS), MPa 630
390
Tensile Strength: Yield (Proof), MPa 270
250

Thermal Properties

Latent Heat of Fusion, J/g 290
420
Maximum Temperature: Mechanical, °C 1010
310
Melting Completion (Liquidus), °C 1440
1650
Melting Onset (Solidus), °C 1390
1600
Specific Heat Capacity, J/kg-K 470
550
Thermal Expansion, µm/m-K 16
8.9

Otherwise Unclassified Properties

Base Metal Price, % relative 24
36
Density, g/cm3 8.0
4.5
Embodied Carbon, kg CO2/kg material 4.7
31
Embodied Energy, MJ/kg 64
500
Embodied Water, L/kg 180
120

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 200
76
Resilience: Unit (Modulus of Resilience), kJ/m3 190
280
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 24
35
Strength to Weight: Axial, points 22
24
Strength to Weight: Bending, points 20
26
Thermal Shock Resistance, points 14
29

Alloy Composition

Aluminum (Al), % 0
1.0 to 2.0
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 0.3
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 0.030
Oxygen (O), % 0
0 to 0.25
Phosphorus (P), % 0 to 0.030
0
Silicon (Si), % 0 to 1.0
0
Sulfur (S), % 0 to 0.030
0
Titanium (Ti), % 0
96.9 to 99
Residuals, % 0
0 to 0.4