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SAE-AISI L2 Steel vs. Grade 7 Titanium

SAE-AISI L2 steel belongs to the iron alloys classification, while grade 7 titanium belongs to the titanium alloys. There are 22 material properties with values for both materials. Properties with values for just one material (10, in this case) are not shown.

For each property being compared, the top bar is SAE-AISI L2 steel and the bottom bar is grade 7 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
38
Tensile Strength: Ultimate (UTS), MPa 590 to 1960
420

Thermal Properties

Latent Heat of Fusion, J/g 250
420
Melting Completion (Liquidus), °C 1450
1660
Melting Onset (Solidus), °C 1410
1610
Specific Heat Capacity, J/kg-K 470
540
Thermal Conductivity, W/m-K 44
22
Thermal Expansion, µm/m-K 12
9.2

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.3
3.6
Electrical Conductivity: Equal Weight (Specific), % IACS 8.4
7.2

Otherwise Unclassified Properties

Density, g/cm3 7.8
4.5
Embodied Carbon, kg CO2/kg material 1.9
47
Embodied Energy, MJ/kg 27
800
Embodied Water, L/kg 51
470

Common Calculations

Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 24
35
Strength to Weight: Axial, points 21 to 70
26
Strength to Weight: Bending, points 20 to 45
28
Thermal Diffusivity, mm2/s 12
8.9
Thermal Shock Resistance, points 19 to 65
31

Alloy Composition

Carbon (C), % 0.45 to 1.0
0 to 0.080
Chromium (Cr), % 0.7 to 1.2
0
Copper (Cu), % 0 to 0.25
0
Hydrogen (H), % 0
0 to 0.015
Iron (Fe), % 95.5 to 98.7
0 to 0.3
Manganese (Mn), % 0.1 to 0.9
0
Molybdenum (Mo), % 0 to 0.25
0
Nitrogen (N), % 0
0 to 0.030
Oxygen (O), % 0
0 to 0.25
Palladium (Pd), % 0
0.12 to 0.25
Phosphorus (P), % 0 to 0.030
0
Silicon (Si), % 0 to 0.5
0
Sulfur (S), % 0 to 0.030
0
Titanium (Ti), % 0
98.7 to 99.88
Vanadium (V), % 0.1 to 0.3
0
Residuals, % 0
0 to 0.4