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EN 1.3558 Steel vs. Grade 25 Titanium

EN 1.3558 steel belongs to the iron alloys classification, while grade 25 titanium belongs to the titanium alloys. There are 23 material properties with values for both materials. Properties with values for just one material (10, in this case) are not shown. Please note that the two materials have significantly dissimilar densities. This means that additional care is required when interpreting the data, because some material properties are based on units of mass, while others are based on units of area or volume.

For each property being compared, the top bar is EN 1.3558 steel and the bottom bar is grade 25 titanium.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 210
110
Poisson's Ratio 0.29
0.32
Shear Modulus, GPa 80
40
Tensile Strength: Ultimate (UTS), MPa 770
1000

Thermal Properties

Latent Heat of Fusion, J/g 240
410
Maximum Temperature: Mechanical, °C 490
340
Melting Completion (Liquidus), °C 1810
1610
Melting Onset (Solidus), °C 1760
1560
Specific Heat Capacity, J/kg-K 410
560
Thermal Conductivity, W/m-K 20
7.1
Thermal Expansion, µm/m-K 12
9.6

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 13
1.0
Electrical Conductivity: Equal Weight (Specific), % IACS 12
2.0

Otherwise Unclassified Properties

Density, g/cm3 9.3
4.5
Embodied Carbon, kg CO2/kg material 8.4
43
Embodied Energy, MJ/kg 130
700
Embodied Water, L/kg 90
320

Common Calculations

Stiffness to Weight: Axial, points 12
13
Stiffness to Weight: Bending, points 21
35
Strength to Weight: Axial, points 23
62
Strength to Weight: Bending, points 20
50
Thermal Diffusivity, mm2/s 5.3
2.8
Thermal Shock Resistance, points 22
71

Alloy Composition

Aluminum (Al), % 0
5.5 to 6.8
Carbon (C), % 0.7 to 0.8
0 to 0.080
Chromium (Cr), % 3.9 to 4.3
0
Copper (Cu), % 0 to 0.3
0
Hydrogen (H), % 0
0 to 0.013
Iron (Fe), % 73.7 to 77.6
0 to 0.4
Manganese (Mn), % 0 to 0.4
0
Molybdenum (Mo), % 0 to 0.6
0
Nickel (Ni), % 0
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 0.025
0
Silicon (Si), % 0 to 0.4
0
Sulfur (S), % 0 to 0.015
0
Titanium (Ti), % 0
86.7 to 90.6
Tungsten (W), % 17.5 to 19
0
Vanadium (V), % 1.0 to 1.3
3.5 to 4.5
Residuals, % 0
0 to 0.4