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Grade C-5 Titanium vs. SAE-AISI T5 Steel

Grade C-5 titanium belongs to the titanium alloys classification, while SAE-AISI T5 steel belongs to the iron alloys. There are 21 material properties with values for both materials. Properties with values for just one material (11, 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 grade C-5 titanium and the bottom bar is SAE-AISI T5 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 110
210
Poisson's Ratio 0.32
0.29
Shear Modulus, GPa 40
80
Tensile Strength: Ultimate (UTS), MPa 1000
860 to 2140

Thermal Properties

Latent Heat of Fusion, J/g 410
250
Melting Completion (Liquidus), °C 1610
1810
Melting Onset (Solidus), °C 1560
1750
Specific Heat Capacity, J/kg-K 560
410
Thermal Conductivity, W/m-K 7.1
21
Thermal Expansion, µm/m-K 9.6
11

Otherwise Unclassified Properties

Base Metal Price, % relative 36
60
Density, g/cm3 4.4
9.4
Embodied Carbon, kg CO2/kg material 38
11
Embodied Energy, MJ/kg 610
170
Embodied Water, L/kg 200
140

Common Calculations

Stiffness to Weight: Axial, points 13
12
Stiffness to Weight: Bending, points 35
21
Strength to Weight: Axial, points 63
25 to 63
Strength to Weight: Bending, points 50
21 to 39
Thermal Diffusivity, mm2/s 2.9
5.5
Thermal Shock Resistance, points 71
26 to 66

Alloy Composition

Aluminum (Al), % 5.5 to 6.8
0
Carbon (C), % 0 to 0.1
0.75 to 0.85
Chromium (Cr), % 0
3.8 to 5.0
Cobalt (Co), % 0
7.0 to 9.5
Copper (Cu), % 0
0 to 0.25
Hydrogen (H), % 0 to 0.015
0
Iron (Fe), % 0 to 0.4
60.6 to 68.3
Manganese (Mn), % 0
0.2 to 0.4
Molybdenum (Mo), % 0
0.5 to 1.3
Nickel (Ni), % 0 to 0.050
0 to 0.3
Oxygen (O), % 0 to 0.25
0
Phosphorus (P), % 0
0 to 0.030
Silicon (Si), % 0
0.2 to 0.4
Sulfur (S), % 0
0 to 0.030
Titanium (Ti), % 87.5 to 91
0
Tungsten (W), % 0
17.5 to 19
Vanadium (V), % 3.5 to 4.5
1.8 to 2.4
Residuals, % 0 to 0.4
0