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Grade 15 Titanium vs. EN 1.4374 Stainless Steel

Grade 15 titanium belongs to the titanium alloys classification, while EN 1.4374 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 15 titanium and the bottom bar is EN 1.4374 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 110
200
Elongation at Break, % 20
40
Fatigue Strength, MPa 290
340
Poisson's Ratio 0.32
0.28
Shear Modulus, GPa 41
77
Shear Strength, MPa 340
550
Tensile Strength: Ultimate (UTS), MPa 540
800
Tensile Strength: Yield (Proof), MPa 430
400

Thermal Properties

Latent Heat of Fusion, J/g 420
290
Maximum Temperature: Mechanical, °C 320
920
Melting Completion (Liquidus), °C 1660
1400
Melting Onset (Solidus), °C 1610
1360
Specific Heat Capacity, J/kg-K 540
480
Thermal Conductivity, W/m-K 21
15
Thermal Expansion, µm/m-K 8.7
17

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 3.4
2.4
Electrical Conductivity: Equal Weight (Specific), % IACS 6.7
2.9

Otherwise Unclassified Properties

Base Metal Price, % relative 37
14
Density, g/cm3 4.5
7.7
Embodied Carbon, kg CO2/kg material 32
2.9
Embodied Energy, MJ/kg 520
42
Embodied Water, L/kg 210
150

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 100
270
Resilience: Unit (Modulus of Resilience), kJ/m3 870
400
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 35
25
Strength to Weight: Axial, points 33
29
Strength to Weight: Bending, points 33
25
Thermal Diffusivity, mm2/s 8.4
4.0
Thermal Shock Resistance, points 41
17

Alloy Composition

Carbon (C), % 0 to 0.080
0.050 to 0.1
Chromium (Cr), % 0
17.5 to 18.5
Copper (Cu), % 0
0 to 0.4
Hydrogen (H), % 0 to 0.015
0
Iron (Fe), % 0 to 0.3
63.5 to 67.9
Manganese (Mn), % 0
9.0 to 10
Molybdenum (Mo), % 0
0 to 0.5
Nickel (Ni), % 0.4 to 0.6
5.0 to 6.0
Nitrogen (N), % 0 to 0.050
0.25 to 0.32
Oxygen (O), % 0 to 0.25
0
Phosphorus (P), % 0
0 to 0.035
Ruthenium (Ru), % 0.040 to 0.060
0
Silicon (Si), % 0
0.3 to 0.6
Sulfur (S), % 0
0 to 0.030
Titanium (Ti), % 98.2 to 99.56
0
Residuals, % 0 to 0.4
0