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Grade 4 Titanium vs. SAE-AISI A3 Steel

Grade 4 titanium belongs to the titanium alloys classification, while SAE-AISI A3 steel belongs to the iron alloys. There are 23 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 grade 4 titanium and the bottom bar is SAE-AISI A3 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 110
190
Poisson's Ratio 0.32
0.29
Shear Modulus, GPa 41
73
Tensile Strength: Ultimate (UTS), MPa 640
700 to 2150

Thermal Properties

Latent Heat of Fusion, J/g 420
260
Melting Completion (Liquidus), °C 1660
1450
Melting Onset (Solidus), °C 1610
1410
Specific Heat Capacity, J/kg-K 540
470
Thermal Conductivity, W/m-K 19
37
Thermal Expansion, µm/m-K 9.4
12

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 3.1
8.3
Electrical Conductivity: Equal Weight (Specific), % IACS 6.3
9.7

Otherwise Unclassified Properties

Base Metal Price, % relative 37
6.0
Density, g/cm3 4.5
7.8
Embodied Carbon, kg CO2/kg material 31
4.4
Embodied Energy, MJ/kg 500
67
Embodied Water, L/kg 110
78

Common Calculations

Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 35
25
Strength to Weight: Axial, points 40
25 to 77
Strength to Weight: Bending, points 37
23 to 48
Thermal Diffusivity, mm2/s 7.6
10
Thermal Shock Resistance, points 46
23 to 70

Alloy Composition

Carbon (C), % 0 to 0.080
1.2 to 1.3
Chromium (Cr), % 0
4.8 to 5.5
Copper (Cu), % 0
0 to 0.25
Hydrogen (H), % 0 to 0.015
0
Iron (Fe), % 0 to 0.5
88.7 to 92
Manganese (Mn), % 0
0.4 to 0.6
Molybdenum (Mo), % 0
0.9 to 1.4
Nickel (Ni), % 0
0 to 0.3
Nitrogen (N), % 0 to 0.050
0
Oxygen (O), % 0 to 0.4
0
Phosphorus (P), % 0
0 to 0.030
Silicon (Si), % 0
0 to 0.5
Sulfur (S), % 0
0 to 0.030
Titanium (Ti), % 98.6 to 100
0
Vanadium (V), % 0
0.8 to 1.4
Residuals, % 0 to 0.4
0