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SAE-AISI T8 Steel vs. R56401 Titanium

SAE-AISI T8 steel belongs to the iron alloys classification, while R56401 titanium belongs to the titanium 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.

For each property being compared, the top bar is SAE-AISI T8 steel and the bottom bar is R56401 titanium.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
110
Poisson's Ratio 0.29
0.32
Shear Modulus, GPa 78
40
Tensile Strength: Ultimate (UTS), MPa 780 to 2140
940

Thermal Properties

Latent Heat of Fusion, J/g 250
410
Melting Completion (Liquidus), °C 1730
1610
Melting Onset (Solidus), °C 1670
1560
Specific Heat Capacity, J/kg-K 420
560
Thermal Conductivity, W/m-K 18
7.1
Thermal Expansion, µm/m-K 12
9.6

Otherwise Unclassified Properties

Base Metal Price, % relative 45
36
Density, g/cm3 9.0
4.5
Embodied Carbon, kg CO2/kg material 10
38
Embodied Energy, MJ/kg 160
610
Embodied Water, L/kg 120
200

Common Calculations

Stiffness to Weight: Axial, points 12
13
Stiffness to Weight: Bending, points 22
35
Strength to Weight: Axial, points 24 to 66
59
Strength to Weight: Bending, points 21 to 41
48
Thermal Diffusivity, mm2/s 4.8
2.9
Thermal Shock Resistance, points 24 to 66
67

Alloy Composition

Aluminum (Al), % 0
5.5 to 6.5
Carbon (C), % 0.75 to 0.85
0 to 0.080
Chromium (Cr), % 3.8 to 4.5
0
Cobalt (Co), % 4.3 to 5.8
0
Copper (Cu), % 0 to 0.25
0
Hydrogen (H), % 0
0 to 0.012
Iron (Fe), % 69.3 to 75.4
0 to 0.25
Manganese (Mn), % 0.2 to 0.4
0
Molybdenum (Mo), % 0.4 to 1.0
0
Nickel (Ni), % 0 to 0.3
0
Nitrogen (N), % 0
0 to 0.050
Oxygen (O), % 0
0 to 0.13
Phosphorus (P), % 0 to 0.030
0
Silicon (Si), % 0.2 to 0.4
0
Sulfur (S), % 0 to 0.030
0
Titanium (Ti), % 0
88.5 to 91
Tungsten (W), % 13.3 to 14.8
0
Vanadium (V), % 1.8 to 2.4
3.5 to 4.5