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S17400 Stainless Steel vs. R56406 Titanium

S17400 stainless steel belongs to the iron alloys classification, while R56406 titanium belongs to the titanium alloys. There are 30 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 S17400 stainless steel and the bottom bar is R56406 titanium.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
110
Elongation at Break, % 11 to 21
9.1
Fatigue Strength, MPa 380 to 670
480
Poisson's Ratio 0.28
0.32
Reduction in Area, % 40 to 62
16
Shear Modulus, GPa 75
40
Tensile Strength: Ultimate (UTS), MPa 910 to 1390
980
Tensile Strength: Yield (Proof), MPa 580 to 1250
850

Thermal Properties

Latent Heat of Fusion, J/g 280
410
Maximum Temperature: Mechanical, °C 850
340
Melting Completion (Liquidus), °C 1440
1610
Melting Onset (Solidus), °C 1400
1560
Specific Heat Capacity, J/kg-K 480
560
Thermal Conductivity, W/m-K 17
7.1
Thermal Expansion, µm/m-K 11
9.6

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.3
1.0
Electrical Conductivity: Equal Weight (Specific), % IACS 2.6
2.0

Otherwise Unclassified Properties

Base Metal Price, % relative 14
36
Density, g/cm3 7.8
4.5
Embodied Carbon, kg CO2/kg material 2.7
38
Embodied Energy, MJ/kg 39
610
Embodied Water, L/kg 130
200

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 140 to 160
85
Resilience: Unit (Modulus of Resilience), kJ/m3 880 to 4060
3420
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 25
35
Strength to Weight: Axial, points 32 to 49
61
Strength to Weight: Bending, points 27 to 35
49
Thermal Diffusivity, mm2/s 4.5
2.8
Thermal Shock Resistance, points 30 to 46
69

Alloy Composition

Aluminum (Al), % 0
5.5 to 6.8
Carbon (C), % 0 to 0.070
0 to 0.1
Chromium (Cr), % 15 to 17
0
Copper (Cu), % 3.0 to 5.0
0
Hydrogen (H), % 0
0 to 0.015
Iron (Fe), % 70.4 to 78.9
0 to 0.3
Manganese (Mn), % 0 to 1.0
0
Nickel (Ni), % 3.0 to 5.0
0
Niobium (Nb), % 0.15 to 0.45
0
Nitrogen (N), % 0
0 to 0.050
Oxygen (O), % 0
0 to 0.2
Phosphorus (P), % 0 to 0.040
0
Silicon (Si), % 0 to 1.0
0
Sulfur (S), % 0 to 0.030
0
Titanium (Ti), % 0
88.1 to 91
Vanadium (V), % 0
3.5 to 4.5