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Grade 27 Titanium vs. AISI 304LN Stainless Steel

Grade 27 titanium belongs to the titanium alloys classification, while AISI 304LN stainless steel belongs to the iron alloys. There are 30 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 grade 27 titanium and the bottom bar is AISI 304LN stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 110
200
Elongation at Break, % 27
7.8 to 46
Fatigue Strength, MPa 170
200 to 440
Poisson's Ratio 0.32
0.28
Shear Modulus, GPa 41
77
Shear Strength, MPa 180
400 to 680
Tensile Strength: Ultimate (UTS), MPa 270
580 to 1160
Tensile Strength: Yield (Proof), MPa 230
230 to 870

Thermal Properties

Latent Heat of Fusion, J/g 420
290
Maximum Temperature: Mechanical, °C 320
960
Melting Completion (Liquidus), °C 1660
1420
Melting Onset (Solidus), °C 1610
1380
Specific Heat Capacity, J/kg-K 540
480
Thermal Conductivity, W/m-K 21
15
Thermal Expansion, µm/m-K 8.7
16

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 3.6
2.4
Electrical Conductivity: Equal Weight (Specific), % IACS 7.1
2.7

Otherwise Unclassified Properties

Base Metal Price, % relative 37
16
Density, g/cm3 4.5
7.8
Embodied Carbon, kg CO2/kg material 33
3.1
Embodied Energy, MJ/kg 530
44
Embodied Water, L/kg 320
150

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 70
83 to 270
Resilience: Unit (Modulus of Resilience), kJ/m3 240
140 to 1900
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 35
25
Strength to Weight: Axial, points 17
21 to 41
Strength to Weight: Bending, points 21
20 to 31
Thermal Diffusivity, mm2/s 8.8
4.0
Thermal Shock Resistance, points 21
13 to 26

Alloy Composition

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 0.2
65 to 73.9
Manganese (Mn), % 0
0 to 2.0
Nickel (Ni), % 0
8.0 to 12
Nitrogen (N), % 0 to 0.030
0.1 to 0.16
Oxygen (O), % 0 to 0.18
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), % 99 to 99.92
0
Residuals, % 0 to 0.4
0