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EN 1.4317 Stainless Steel vs. Grade 27 Titanium

EN 1.4317 stainless steel belongs to the iron alloys classification, while grade 27 titanium belongs to the titanium alloys. There are 29 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 EN 1.4317 stainless steel and the bottom bar is grade 27 titanium.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
110
Elongation at Break, % 17
27
Fatigue Strength, MPa 380
170
Poisson's Ratio 0.28
0.32
Shear Modulus, GPa 76
41
Tensile Strength: Ultimate (UTS), MPa 860
270
Tensile Strength: Yield (Proof), MPa 630
230

Thermal Properties

Latent Heat of Fusion, J/g 280
420
Maximum Temperature: Mechanical, °C 770
320
Melting Completion (Liquidus), °C 1440
1660
Melting Onset (Solidus), °C 1400
1610
Specific Heat Capacity, J/kg-K 480
540
Thermal Conductivity, W/m-K 26
21
Thermal Expansion, µm/m-K 11
8.7

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.7
3.6
Electrical Conductivity: Equal Weight (Specific), % IACS 3.2
7.1

Otherwise Unclassified Properties

Base Metal Price, % relative 10
37
Density, g/cm3 7.8
4.5
Embodied Carbon, kg CO2/kg material 2.4
33
Embodied Energy, MJ/kg 33
530
Embodied Water, L/kg 110
320

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 130
70
Resilience: Unit (Modulus of Resilience), kJ/m3 1010
240
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 25
35
Strength to Weight: Axial, points 31
17
Strength to Weight: Bending, points 26
21
Thermal Diffusivity, mm2/s 7.0
8.8
Thermal Shock Resistance, points 30
21

Alloy Composition

Carbon (C), % 0 to 0.060
0 to 0.080
Chromium (Cr), % 12 to 13.5
0
Hydrogen (H), % 0
0 to 0.015
Iron (Fe), % 78.7 to 84.5
0 to 0.2
Manganese (Mn), % 0 to 1.0
0
Molybdenum (Mo), % 0 to 0.7
0
Nickel (Ni), % 3.5 to 5.0
0
Nitrogen (N), % 0
0 to 0.030
Oxygen (O), % 0
0 to 0.18
Phosphorus (P), % 0 to 0.035
0
Ruthenium (Ru), % 0
0.080 to 0.14
Silicon (Si), % 0 to 1.0
0
Sulfur (S), % 0 to 0.025
0
Titanium (Ti), % 0
99 to 99.92
Residuals, % 0
0 to 0.4