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EN 1.7117 Steel vs. Grade 27 Titanium

EN 1.7117 steel belongs to the iron alloys classification, while grade 27 titanium belongs to the titanium alloys. There are 24 material properties with values for both materials. Properties with values for just one material (8, in this case) are not shown.

For each property being compared, the top bar is EN 1.7117 steel and the bottom bar is grade 27 titanium.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
110
Poisson's Ratio 0.29
0.32
Shear Modulus, GPa 72
41
Tensile Strength: Ultimate (UTS), MPa 660 to 1930
270

Thermal Properties

Latent Heat of Fusion, J/g 270
420
Maximum Temperature: Mechanical, °C 420
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 43
21
Thermal Expansion, µm/m-K 13
8.7

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.5
3.6
Electrical Conductivity: Equal Weight (Specific), % IACS 8.7
7.1

Otherwise Unclassified Properties

Base Metal Price, % relative 2.6
37
Density, g/cm3 7.7
4.5
Embodied Carbon, kg CO2/kg material 1.5
33
Embodied Energy, MJ/kg 21
530
Embodied Water, L/kg 51
320

Common Calculations

Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 25
35
Strength to Weight: Axial, points 24 to 69
17
Strength to Weight: Bending, points 22 to 44
21
Thermal Diffusivity, mm2/s 12
8.8
Thermal Shock Resistance, points 20 to 58
21

Alloy Composition

Carbon (C), % 0.49 to 0.56
0 to 0.080
Chromium (Cr), % 0.7 to 1.0
0
Hydrogen (H), % 0
0 to 0.015
Iron (Fe), % 95.2 to 96.4
0 to 0.2
Manganese (Mn), % 0.7 to 1.0
0
Nickel (Ni), % 0.5 to 0.7
0
Nitrogen (N), % 0
0 to 0.030
Oxygen (O), % 0
0 to 0.18
Phosphorus (P), % 0 to 0.025
0
Ruthenium (Ru), % 0
0.080 to 0.14
Silicon (Si), % 1.2 to 1.5
0
Sulfur (S), % 0 to 0.025
0
Titanium (Ti), % 0
99 to 99.92
Residuals, % 0
0 to 0.4