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S31655 Stainless Steel vs. R56406 Titanium

S31655 stainless steel belongs to the iron alloys classification, while R56406 titanium belongs to the titanium alloys. There are 29 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 S31655 stainless steel and the bottom bar is R56406 titanium.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
110
Elongation at Break, % 39
9.1
Fatigue Strength, MPa 300
480
Poisson's Ratio 0.28
0.32
Shear Modulus, GPa 78
40
Tensile Strength: Ultimate (UTS), MPa 710
980
Tensile Strength: Yield (Proof), MPa 350
850

Thermal Properties

Latent Heat of Fusion, J/g 290
410
Maximum Temperature: Mechanical, °C 1010
340
Melting Completion (Liquidus), °C 1430
1610
Melting Onset (Solidus), °C 1380
1560
Specific Heat Capacity, J/kg-K 480
560
Thermal Conductivity, W/m-K 15
7.1
Thermal Expansion, µm/m-K 16
9.6

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.4
1.0
Electrical Conductivity: Equal Weight (Specific), % IACS 2.7
2.0

Otherwise Unclassified Properties

Base Metal Price, % relative 17
36
Density, g/cm3 7.8
4.5
Embodied Carbon, kg CO2/kg material 3.3
38
Embodied Energy, MJ/kg 46
610
Embodied Water, L/kg 160
200

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 230
85
Resilience: Unit (Modulus of Resilience), kJ/m3 310
3420
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 25
35
Strength to Weight: Axial, points 25
61
Strength to Weight: Bending, points 23
49
Thermal Diffusivity, mm2/s 4.0
2.8
Thermal Shock Resistance, points 16
69

Alloy Composition

Aluminum (Al), % 0
5.5 to 6.8
Carbon (C), % 0 to 0.030
0 to 0.1
Chromium (Cr), % 19.5 to 21.5
0
Copper (Cu), % 0 to 1.0
0
Hydrogen (H), % 0
0 to 0.015
Iron (Fe), % 63.2 to 71.9
0 to 0.3
Manganese (Mn), % 0 to 2.0
0
Molybdenum (Mo), % 0.5 to 1.5
0
Nickel (Ni), % 8.0 to 9.5
0
Nitrogen (N), % 0.14 to 0.25
0 to 0.050
Oxygen (O), % 0
0 to 0.2
Phosphorus (P), % 0 to 0.045
0
Silicon (Si), % 0 to 1.0
0
Sulfur (S), % 0 to 0.015
0
Titanium (Ti), % 0
88.1 to 91
Vanadium (V), % 0
3.5 to 4.5