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Grade 24 Titanium vs. ASTM A387 Grade 9 Steel

Grade 24 titanium belongs to the titanium alloys classification, while ASTM A387 grade 9 steel belongs to the iron alloys. There are 29 material properties with values for both materials. Properties with values for just one material (4, in this case) are not shown.

For each property being compared, the top bar is grade 24 titanium and the bottom bar is ASTM A387 grade 9 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 110
190
Elongation at Break, % 11
20 to 21
Fatigue Strength, MPa 550
160 to 240
Poisson's Ratio 0.32
0.28
Shear Modulus, GPa 40
75
Shear Strength, MPa 610
310 to 380
Tensile Strength: Ultimate (UTS), MPa 1010
500 to 600
Tensile Strength: Yield (Proof), MPa 940
230 to 350

Thermal Properties

Latent Heat of Fusion, J/g 410
270
Maximum Temperature: Mechanical, °C 340
600
Melting Completion (Liquidus), °C 1610
1460
Melting Onset (Solidus), °C 1560
1410
Specific Heat Capacity, J/kg-K 560
470
Thermal Conductivity, W/m-K 7.1
26
Thermal Expansion, µm/m-K 9.6
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 1.0
9.0
Electrical Conductivity: Equal Weight (Specific), % IACS 2.0
10

Otherwise Unclassified Properties

Density, g/cm3 4.5
7.8
Embodied Carbon, kg CO2/kg material 43
2.1
Embodied Energy, MJ/kg 710
28
Embodied Water, L/kg 310
87

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 110
83 to 110
Resilience: Unit (Modulus of Resilience), kJ/m3 4160
140 to 310
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 35
25
Strength to Weight: Axial, points 63
18 to 21
Strength to Weight: Bending, points 50
18 to 20
Thermal Diffusivity, mm2/s 2.9
6.9
Thermal Shock Resistance, points 72
14 to 17

Alloy Composition

Aluminum (Al), % 5.5 to 6.8
0
Carbon (C), % 0 to 0.080
0 to 0.15
Chromium (Cr), % 0
8.0 to 10
Hydrogen (H), % 0 to 0.015
0
Iron (Fe), % 0 to 0.4
87.1 to 90.8
Manganese (Mn), % 0
0.3 to 0.6
Molybdenum (Mo), % 0
0.9 to 1.1
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 0.025
Silicon (Si), % 0
0 to 1.0
Sulfur (S), % 0
0 to 0.025
Titanium (Ti), % 87.5 to 91
0
Vanadium (V), % 3.5 to 4.5
0 to 0.040
Residuals, % 0 to 0.4
0