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Grade 27 Titanium vs. EN 1.4945 Stainless Steel

Grade 27 titanium belongs to the titanium alloys classification, while EN 1.4945 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 1.4945 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 110
200
Elongation at Break, % 27
19 to 34
Fatigue Strength, MPa 170
230 to 350
Poisson's Ratio 0.32
0.28
Shear Modulus, GPa 41
77
Shear Strength, MPa 180
430 to 460
Tensile Strength: Ultimate (UTS), MPa 270
640 to 740
Tensile Strength: Yield (Proof), MPa 230
290 to 550

Thermal Properties

Latent Heat of Fusion, J/g 420
290
Maximum Temperature: Mechanical, °C 320
920
Melting Completion (Liquidus), °C 1660
1490
Melting Onset (Solidus), °C 1610
1440
Specific Heat Capacity, J/kg-K 540
470
Thermal Conductivity, W/m-K 21
14
Thermal Expansion, µm/m-K 8.7
17

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 3.6
2.9
Electrical Conductivity: Equal Weight (Specific), % IACS 7.1
3.2

Otherwise Unclassified Properties

Base Metal Price, % relative 37
30
Density, g/cm3 4.5
8.1
Embodied Carbon, kg CO2/kg material 33
5.0
Embodied Energy, MJ/kg 530
73
Embodied Water, L/kg 320
150

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 70
130 to 180
Resilience: Unit (Modulus of Resilience), kJ/m3 240
210 to 760
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 35
24
Strength to Weight: Axial, points 17
22 to 25
Strength to Weight: Bending, points 21
20 to 22
Thermal Diffusivity, mm2/s 8.8
3.7
Thermal Shock Resistance, points 21
14 to 16

Alloy Composition

Carbon (C), % 0 to 0.080
0.040 to 0.1
Chromium (Cr), % 0
15.5 to 17.5
Hydrogen (H), % 0 to 0.015
0
Iron (Fe), % 0 to 0.2
57.9 to 65.7
Manganese (Mn), % 0
0 to 1.5
Nickel (Ni), % 0
15.5 to 17.5
Niobium (Nb), % 0
0.4 to 1.2
Nitrogen (N), % 0 to 0.030
0.060 to 0.14
Oxygen (O), % 0 to 0.18
0
Phosphorus (P), % 0
0 to 0.035
Ruthenium (Ru), % 0.080 to 0.14
0
Silicon (Si), % 0
0.3 to 0.6
Sulfur (S), % 0
0 to 0.015
Titanium (Ti), % 99 to 99.92
0
Tungsten (W), % 0
2.5 to 3.5
Residuals, % 0 to 0.4
0