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S17700 Stainless Steel vs. R56401 Titanium

S17700 stainless steel belongs to the iron alloys classification, while R56401 titanium belongs to the titanium alloys. There are 30 material properties with values for both materials. Properties with values for just one material (5, in this case) are not shown.

For each property being compared, the top bar is S17700 stainless steel and the bottom bar is R56401 titanium.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
110
Elongation at Break, % 1.0 to 23
9.1
Fatigue Strength, MPa 290 to 560
480
Poisson's Ratio 0.28
0.32
Shear Modulus, GPa 76
40
Shear Strength, MPa 740 to 940
560
Tensile Strength: Ultimate (UTS), MPa 1180 to 1650
940
Tensile Strength: Yield (Proof), MPa 430 to 1210
850

Thermal Properties

Latent Heat of Fusion, J/g 290
410
Maximum Temperature: Mechanical, °C 890
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 15
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 2.7
2.0

Otherwise Unclassified Properties

Base Metal Price, % relative 13
36
Density, g/cm3 7.7
4.5
Embodied Carbon, kg CO2/kg material 2.8
38
Embodied Energy, MJ/kg 40
610
Embodied Water, L/kg 150
200

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 15 to 210
83
Resilience: Unit (Modulus of Resilience), kJ/m3 460 to 3750
3440
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 25
35
Strength to Weight: Axial, points 42 to 59
59
Strength to Weight: Bending, points 32 to 40
48
Thermal Diffusivity, mm2/s 4.1
2.9
Thermal Shock Resistance, points 39 to 54
67

Alloy Composition

Aluminum (Al), % 0.75 to 1.5
5.5 to 6.5
Carbon (C), % 0 to 0.090
0 to 0.080
Chromium (Cr), % 16 to 18
0
Hydrogen (H), % 0
0 to 0.012
Iron (Fe), % 70.5 to 76.8
0 to 0.25
Manganese (Mn), % 0 to 1.0
0
Nickel (Ni), % 6.5 to 7.8
0
Nitrogen (N), % 0
0 to 0.050
Oxygen (O), % 0
0 to 0.13
Phosphorus (P), % 0 to 0.040
0
Silicon (Si), % 0 to 1.0
0
Sulfur (S), % 0 to 0.030
0
Titanium (Ti), % 0
88.5 to 91
Vanadium (V), % 0
3.5 to 4.5