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Grade 28 Titanium vs. AISI 317LN Stainless Steel

Grade 28 titanium belongs to the titanium alloys classification, while AISI 317LN stainless steel belongs to the iron 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 grade 28 titanium and the bottom bar is AISI 317LN stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 110
200
Elongation at Break, % 11 to 17
45
Fatigue Strength, MPa 330 to 480
250
Poisson's Ratio 0.32
0.28
Shear Modulus, GPa 40
79
Shear Strength, MPa 420 to 590
430
Tensile Strength: Ultimate (UTS), MPa 690 to 980
620
Tensile Strength: Yield (Proof), MPa 540 to 810
270

Thermal Properties

Latent Heat of Fusion, J/g 410
290
Maximum Temperature: Mechanical, °C 330
1010
Melting Completion (Liquidus), °C 1640
1450
Melting Onset (Solidus), °C 1590
1400
Specific Heat Capacity, J/kg-K 550
470
Thermal Conductivity, W/m-K 8.3
14
Thermal Expansion, µm/m-K 9.9
16

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 1.3
2.2
Electrical Conductivity: Equal Weight (Specific), % IACS 2.7
2.4

Otherwise Unclassified Properties

Base Metal Price, % relative 36
21
Density, g/cm3 4.5
7.9
Embodied Carbon, kg CO2/kg material 37
4.3
Embodied Energy, MJ/kg 600
59
Embodied Water, L/kg 370
160

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 87 to 110
220
Resilience: Unit (Modulus of Resilience), kJ/m3 1370 to 3100
190
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 35
25
Strength to Weight: Axial, points 43 to 61
22
Strength to Weight: Bending, points 39 to 49
20
Thermal Diffusivity, mm2/s 3.4
3.9
Thermal Shock Resistance, points 47 to 66
14

Alloy Composition

Aluminum (Al), % 2.5 to 3.5
0
Carbon (C), % 0 to 0.080
0 to 0.030
Chromium (Cr), % 0
18 to 20
Hydrogen (H), % 0 to 0.015
0
Iron (Fe), % 0 to 0.25
57.9 to 67.9
Manganese (Mn), % 0
0 to 2.0
Molybdenum (Mo), % 0
3.0 to 4.0
Nickel (Ni), % 0
11 to 15
Nitrogen (N), % 0 to 0.030
0.1 to 0.22
Oxygen (O), % 0 to 0.15
0
Phosphorus (P), % 0
0 to 0.045
Ruthenium (Ru), % 0.080 to 0.14
0
Silicon (Si), % 0
0 to 0.75
Sulfur (S), % 0
0 to 0.030
Titanium (Ti), % 92.4 to 95.4
0
Vanadium (V), % 2.0 to 3.0
0
Residuals, % 0 to 0.4
0