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Grade 3 Titanium vs. S31727 Stainless Steel

Grade 3 titanium belongs to the titanium alloys classification, while S31727 stainless steel belongs to the iron alloys. There are 28 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 grade 3 titanium and the bottom bar is S31727 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 170
190
Elastic (Young's, Tensile) Modulus, GPa 110
200
Elongation at Break, % 21
40
Fatigue Strength, MPa 300
240
Poisson's Ratio 0.32
0.28
Reduction in Area, % 34
56
Shear Modulus, GPa 39
78
Shear Strength, MPa 320
430
Tensile Strength: Ultimate (UTS), MPa 510
630
Tensile Strength: Yield (Proof), MPa 440
270

Thermal Properties

Latent Heat of Fusion, J/g 420
290
Maximum Temperature: Mechanical, °C 320
1010
Melting Completion (Liquidus), °C 1660
1440
Melting Onset (Solidus), °C 1610
1390
Specific Heat Capacity, J/kg-K 540
470
Thermal Expansion, µm/m-K 9.2
16

Otherwise Unclassified Properties

Base Metal Price, % relative 37
24
Density, g/cm3 4.5
8.0
Embodied Carbon, kg CO2/kg material 31
4.7
Embodied Energy, MJ/kg 510
64
Embodied Water, L/kg 110
180

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 100
200
Resilience: Unit (Modulus of Resilience), kJ/m3 910
190
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 35
24
Strength to Weight: Axial, points 32
22
Strength to Weight: Bending, points 32
20
Thermal Shock Resistance, points 37
14

Alloy Composition

Carbon (C), % 0 to 0.080
0 to 0.030
Chromium (Cr), % 0
17.5 to 19
Copper (Cu), % 0
2.8 to 4.0
Hydrogen (H), % 0 to 0.015
0
Iron (Fe), % 0 to 0.3
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 0.35
0
Phosphorus (P), % 0
0 to 0.030
Silicon (Si), % 0
0 to 1.0
Sulfur (S), % 0
0 to 0.030
Titanium (Ti), % 98.8 to 100
0
Residuals, % 0 to 0.4
0