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Grade 19 Titanium vs. S31727 Stainless Steel

Grade 19 titanium belongs to the titanium alloys classification, while S31727 stainless steel belongs to the iron alloys. There are 27 material properties with values for both materials. Properties with values for just one material (6, in this case) are not shown.

For each property being compared, the top bar is grade 19 titanium and the bottom bar is S31727 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 120
200
Elongation at Break, % 5.6 to 17
40
Fatigue Strength, MPa 550 to 620
240
Poisson's Ratio 0.32
0.28
Reduction in Area, % 22
56
Shear Modulus, GPa 47
78
Shear Strength, MPa 550 to 750
430
Tensile Strength: Ultimate (UTS), MPa 890 to 1300
630
Tensile Strength: Yield (Proof), MPa 870 to 1170
270

Thermal Properties

Latent Heat of Fusion, J/g 400
290
Maximum Temperature: Mechanical, °C 370
1010
Melting Completion (Liquidus), °C 1660
1440
Melting Onset (Solidus), °C 1600
1390
Specific Heat Capacity, J/kg-K 520
470
Thermal Expansion, µm/m-K 9.1
16

Otherwise Unclassified Properties

Base Metal Price, % relative 45
24
Density, g/cm3 5.0
8.0
Embodied Carbon, kg CO2/kg material 47
4.7
Embodied Energy, MJ/kg 760
64
Embodied Water, L/kg 230
180

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 70 to 150
200
Resilience: Unit (Modulus of Resilience), kJ/m3 3040 to 5530
190
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 33
24
Strength to Weight: Axial, points 49 to 72
22
Strength to Weight: Bending, points 41 to 53
20
Thermal Shock Resistance, points 57 to 83
14

Alloy Composition

Aluminum (Al), % 3.0 to 4.0
0
Carbon (C), % 0 to 0.050
0 to 0.030
Chromium (Cr), % 5.5 to 6.5
17.5 to 19
Copper (Cu), % 0
2.8 to 4.0
Hydrogen (H), % 0 to 0.020
0
Iron (Fe), % 0 to 0.3
53.7 to 61.3
Manganese (Mn), % 0
0 to 1.0
Molybdenum (Mo), % 3.5 to 4.5
3.8 to 4.5
Nickel (Ni), % 0
14.5 to 16.5
Nitrogen (N), % 0 to 0.030
0.15 to 0.21
Oxygen (O), % 0 to 0.12
0
Phosphorus (P), % 0
0 to 0.030
Silicon (Si), % 0
0 to 1.0
Sulfur (S), % 0
0 to 0.030
Titanium (Ti), % 71.1 to 77
0
Vanadium (V), % 7.5 to 8.5
0
Zirconium (Zr), % 3.5 to 4.5
0
Residuals, % 0 to 0.4
0