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Grade 24 Titanium vs. SAE-AISI 1055 Steel

Grade 24 titanium belongs to the titanium alloys classification, while SAE-AISI 1055 steel belongs to the iron alloys. There are 30 material properties with values for both materials. Properties with values for just one material (2, in this case) are not shown.

For each property being compared, the top bar is grade 24 titanium and the bottom bar is SAE-AISI 1055 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 110
190
Elongation at Break, % 11
11 to 14
Fatigue Strength, MPa 550
260 to 390
Poisson's Ratio 0.32
0.29
Reduction in Area, % 28
34 to 45
Shear Modulus, GPa 40
72
Shear Strength, MPa 610
440 to 450
Tensile Strength: Ultimate (UTS), MPa 1010
730 to 750
Tensile Strength: Yield (Proof), MPa 940
400 to 630

Thermal Properties

Latent Heat of Fusion, J/g 410
250
Maximum Temperature: Mechanical, °C 340
400
Melting Completion (Liquidus), °C 1610
1460
Melting Onset (Solidus), °C 1560
1420
Specific Heat Capacity, J/kg-K 560
470
Thermal Conductivity, W/m-K 7.1
51
Thermal Expansion, µm/m-K 9.6
12

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 1.0
11
Electrical Conductivity: Equal Weight (Specific), % IACS 2.0
12

Otherwise Unclassified Properties

Density, g/cm3 4.5
7.8
Embodied Carbon, kg CO2/kg material 43
1.4
Embodied Energy, MJ/kg 710
18
Embodied Water, L/kg 310
46

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 110
80 to 85
Resilience: Unit (Modulus of Resilience), kJ/m3 4160
440 to 1070
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 35
24
Strength to Weight: Axial, points 63
26
Strength to Weight: Bending, points 50
23
Thermal Diffusivity, mm2/s 2.9
14
Thermal Shock Resistance, points 72
23 to 24

Alloy Composition

Aluminum (Al), % 5.5 to 6.8
0
Carbon (C), % 0 to 0.080
0.5 to 0.6
Hydrogen (H), % 0 to 0.015
0
Iron (Fe), % 0 to 0.4
98.4 to 98.9
Manganese (Mn), % 0
0.6 to 0.9
Nitrogen (N), % 0 to 0.050
0
Oxygen (O), % 0 to 0.2
0
Palladium (Pd), % 0.040 to 0.080
0
Phosphorus (P), % 0
0 to 0.040
Sulfur (S), % 0
0 to 0.050
Titanium (Ti), % 87.5 to 91
0
Vanadium (V), % 3.5 to 4.5
0
Residuals, % 0 to 0.4
0