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EN 1.1191 Steel vs. Grade 25 Titanium

EN 1.1191 steel belongs to the iron alloys classification, while grade 25 titanium belongs to the titanium alloys. There are 29 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 EN 1.1191 steel and the bottom bar is grade 25 titanium.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
110
Elongation at Break, % 16 to 17
11
Fatigue Strength, MPa 210 to 290
550
Poisson's Ratio 0.29
0.32
Shear Modulus, GPa 72
40
Shear Strength, MPa 380 to 430
600
Tensile Strength: Ultimate (UTS), MPa 630 to 700
1000
Tensile Strength: Yield (Proof), MPa 310 to 440
940

Thermal Properties

Latent Heat of Fusion, J/g 250
410
Maximum Temperature: Mechanical, °C 400
340
Melting Completion (Liquidus), °C 1460
1610
Melting Onset (Solidus), °C 1420
1560
Specific Heat Capacity, J/kg-K 470
560
Thermal Conductivity, W/m-K 48
7.1
Thermal Expansion, µm/m-K 12
9.6

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.2
1.0
Electrical Conductivity: Equal Weight (Specific), % IACS 8.3
2.0

Otherwise Unclassified Properties

Density, g/cm3 7.8
4.5
Embodied Carbon, kg CO2/kg material 1.4
43
Embodied Energy, MJ/kg 19
700
Embodied Water, L/kg 47
320

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 83 to 100
110
Resilience: Unit (Modulus of Resilience), kJ/m3 260 to 510
4220
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 24
35
Strength to Weight: Axial, points 22 to 25
62
Strength to Weight: Bending, points 21 to 22
50
Thermal Diffusivity, mm2/s 13
2.8
Thermal Shock Resistance, points 20 to 22
71

Alloy Composition

Aluminum (Al), % 0
5.5 to 6.8
Carbon (C), % 0.42 to 0.5
0 to 0.080
Chromium (Cr), % 0 to 0.4
0
Hydrogen (H), % 0
0 to 0.013
Iron (Fe), % 97.3 to 99.08
0 to 0.4
Manganese (Mn), % 0.5 to 0.8
0
Molybdenum (Mo), % 0 to 0.1
0
Nickel (Ni), % 0 to 0.4
0.3 to 0.8
Nitrogen (N), % 0
0 to 0.050
Oxygen (O), % 0
0 to 0.2
Palladium (Pd), % 0
0.040 to 0.080
Phosphorus (P), % 0 to 0.035
0
Silicon (Si), % 0 to 0.4
0
Sulfur (S), % 0 to 0.035
0
Titanium (Ti), % 0
86.7 to 90.6
Vanadium (V), % 0
3.5 to 4.5
Residuals, % 0
0 to 0.4