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Grade 27 Titanium vs. EN 1.4864 Stainless Steel

Grade 27 titanium belongs to the titanium alloys classification, while EN 1.4864 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 EN 1.4864 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 110
190
Elongation at Break, % 27
33
Fatigue Strength, MPa 170
200
Poisson's Ratio 0.32
0.29
Shear Modulus, GPa 41
75
Shear Strength, MPa 180
430
Tensile Strength: Ultimate (UTS), MPa 270
650
Tensile Strength: Yield (Proof), MPa 230
260

Thermal Properties

Latent Heat of Fusion, J/g 420
310
Maximum Temperature: Mechanical, °C 320
1100
Melting Completion (Liquidus), °C 1660
1390
Melting Onset (Solidus), °C 1610
1340
Specific Heat Capacity, J/kg-K 540
480
Thermal Conductivity, W/m-K 21
13
Thermal Expansion, µm/m-K 8.7
14

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 3.6
1.7
Electrical Conductivity: Equal Weight (Specific), % IACS 7.1
1.9

Otherwise Unclassified Properties

Base Metal Price, % relative 37
30
Density, g/cm3 4.5
8.0
Embodied Carbon, kg CO2/kg material 33
5.3
Embodied Energy, MJ/kg 530
75
Embodied Water, L/kg 320
180

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 70
170
Resilience: Unit (Modulus of Resilience), kJ/m3 240
170
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 35
24
Strength to Weight: Axial, points 17
23
Strength to Weight: Bending, points 21
21
Thermal Diffusivity, mm2/s 8.8
3.3
Thermal Shock Resistance, points 21
17

Alloy Composition

Carbon (C), % 0 to 0.080
0 to 0.15
Chromium (Cr), % 0
15 to 17
Hydrogen (H), % 0 to 0.015
0
Iron (Fe), % 0 to 0.2
41.7 to 51
Manganese (Mn), % 0
0 to 2.0
Nickel (Ni), % 0
33 to 37
Nitrogen (N), % 0 to 0.030
0 to 0.1
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
1.0 to 2.0
Sulfur (S), % 0
0 to 0.015
Titanium (Ti), % 99 to 99.92
0
Residuals, % 0 to 0.4
0