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Grade 15 Titanium vs. EN 1.4435 Stainless Steel

Grade 15 titanium belongs to the titanium alloys classification, while EN 1.4435 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 1.4435 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 110
200
Elongation at Break, % 20
43
Fatigue Strength, MPa 290
220
Poisson's Ratio 0.32
0.28
Shear Modulus, GPa 41
78
Shear Strength, MPa 340
420
Tensile Strength: Ultimate (UTS), MPa 540
610
Tensile Strength: Yield (Proof), MPa 430
240

Thermal Properties

Latent Heat of Fusion, J/g 420
290
Maximum Temperature: Mechanical, °C 320
980
Melting Completion (Liquidus), °C 1660
1440
Melting Onset (Solidus), °C 1610
1400
Specific Heat Capacity, J/kg-K 540
470
Thermal Conductivity, W/m-K 21
15
Thermal Expansion, µm/m-K 8.7
16

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 3.4
2.3
Electrical Conductivity: Equal Weight (Specific), % IACS 6.7
2.6

Otherwise Unclassified Properties

Base Metal Price, % relative 37
21
Density, g/cm3 4.5
7.9
Embodied Carbon, kg CO2/kg material 32
4.1
Embodied Energy, MJ/kg 520
57
Embodied Water, L/kg 210
160

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 100
210
Resilience: Unit (Modulus of Resilience), kJ/m3 870
150
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 35
25
Strength to Weight: Axial, points 33
21
Strength to Weight: Bending, points 33
20
Thermal Diffusivity, mm2/s 8.4
4.0
Thermal Shock Resistance, points 41
14

Alloy Composition

Carbon (C), % 0 to 0.080
0 to 0.030
Chromium (Cr), % 0
17 to 19
Hydrogen (H), % 0 to 0.015
0
Iron (Fe), % 0 to 0.3
59.8 to 68
Manganese (Mn), % 0
0 to 2.0
Molybdenum (Mo), % 0
2.5 to 3.0
Nickel (Ni), % 0.4 to 0.6
12.5 to 15
Nitrogen (N), % 0 to 0.050
0 to 0.1
Oxygen (O), % 0 to 0.25
0
Phosphorus (P), % 0
0 to 0.045
Ruthenium (Ru), % 0.040 to 0.060
0
Silicon (Si), % 0
0 to 1.0
Sulfur (S), % 0
0 to 0.015
Titanium (Ti), % 98.2 to 99.56
0
Residuals, % 0 to 0.4
0