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S31727 Stainless Steel vs. R58150 Titanium

S31727 stainless steel belongs to the iron alloys classification, while R58150 titanium belongs to the titanium alloys. There are 27 material properties with values for both materials. Properties with values for just one material (4, in this case) are not shown.

For each property being compared, the top bar is S31727 stainless steel and the bottom bar is R58150 titanium.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
140
Elongation at Break, % 40
13
Fatigue Strength, MPa 240
330
Poisson's Ratio 0.28
0.32
Reduction in Area, % 56
68
Shear Modulus, GPa 78
52
Shear Strength, MPa 430
470
Tensile Strength: Ultimate (UTS), MPa 630
770
Tensile Strength: Yield (Proof), MPa 270
550

Thermal Properties

Latent Heat of Fusion, J/g 290
410
Maximum Temperature: Mechanical, °C 1010
320
Melting Completion (Liquidus), °C 1440
1760
Melting Onset (Solidus), °C 1390
1700
Specific Heat Capacity, J/kg-K 470
500
Thermal Expansion, µm/m-K 16
8.4

Otherwise Unclassified Properties

Base Metal Price, % relative 24
48
Density, g/cm3 8.0
5.4
Embodied Carbon, kg CO2/kg material 4.7
31
Embodied Energy, MJ/kg 64
480
Embodied Water, L/kg 180
150

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 200
94
Resilience: Unit (Modulus of Resilience), kJ/m3 190
1110
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 24
32
Strength to Weight: Axial, points 22
40
Strength to Weight: Bending, points 20
35
Thermal Shock Resistance, points 14
48

Alloy Composition

Carbon (C), % 0 to 0.030
0 to 0.1
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 0.1
Manganese (Mn), % 0 to 1.0
0
Molybdenum (Mo), % 3.8 to 4.5
14 to 16
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
83.5 to 86