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AISI 317L Stainless Steel vs. Grade 27 Titanium

AISI 317L stainless steel belongs to the iron alloys classification, while grade 27 titanium belongs to the titanium alloys. There are 31 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 AISI 317L stainless steel and the bottom bar is grade 27 titanium.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
110
Elongation at Break, % 44
27
Fatigue Strength, MPa 220
170
Poisson's Ratio 0.28
0.32
Reduction in Area, % 56
34
Shear Modulus, GPa 82
41
Shear Strength, MPa 380
180
Tensile Strength: Ultimate (UTS), MPa 550
270
Tensile Strength: Yield (Proof), MPa 250
230

Thermal Properties

Latent Heat of Fusion, J/g 290
420
Maximum Temperature: Mechanical, °C 1010
320
Melting Completion (Liquidus), °C 1400
1660
Melting Onset (Solidus), °C 1380
1610
Specific Heat Capacity, J/kg-K 470
540
Thermal Conductivity, W/m-K 14
21
Thermal Expansion, µm/m-K 17
8.7

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.0
3.6
Electrical Conductivity: Equal Weight (Specific), % IACS 2.3
7.1

Otherwise Unclassified Properties

Base Metal Price, % relative 21
37
Density, g/cm3 7.9
4.5
Embodied Carbon, kg CO2/kg material 4.3
33
Embodied Energy, MJ/kg 59
530
Embodied Water, L/kg 160
320

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 200
70
Resilience: Unit (Modulus of Resilience), kJ/m3 150
240
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 25
35
Strength to Weight: Axial, points 19
17
Strength to Weight: Bending, points 19
21
Thermal Diffusivity, mm2/s 3.8
8.8
Thermal Shock Resistance, points 12
21

Alloy Composition

Carbon (C), % 0 to 0.030
0 to 0.080
Chromium (Cr), % 18 to 20
0
Hydrogen (H), % 0
0 to 0.015
Iron (Fe), % 58 to 68
0 to 0.2
Manganese (Mn), % 0 to 2.0
0
Molybdenum (Mo), % 3.0 to 4.0
0
Nickel (Ni), % 11 to 15
0
Nitrogen (N), % 0 to 0.1
0 to 0.030
Oxygen (O), % 0
0 to 0.18
Phosphorus (P), % 0 to 0.045
0
Ruthenium (Ru), % 0
0.080 to 0.14
Silicon (Si), % 0 to 0.75
0
Sulfur (S), % 0 to 0.030
0
Titanium (Ti), % 0
99 to 99.92
Residuals, % 0
0 to 0.4