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Grade 9 Titanium vs. SAE-AISI 1340 Steel

Grade 9 titanium belongs to the titanium alloys classification, while SAE-AISI 1340 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 9 titanium and the bottom bar is SAE-AISI 1340 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 110
190
Elongation at Break, % 11 to 17
11 to 23
Fatigue Strength, MPa 330 to 480
220 to 390
Poisson's Ratio 0.32
0.29
Shear Modulus, GPa 40
72
Shear Strength, MPa 430 to 580
340 to 440
Tensile Strength: Ultimate (UTS), MPa 700 to 960
540 to 730
Tensile Strength: Yield (Proof), MPa 540 to 830
300 to 620

Thermal Properties

Latent Heat of Fusion, J/g 410
250
Maximum Temperature: Mechanical, °C 330
400
Melting Completion (Liquidus), °C 1640
1450
Melting Onset (Solidus), °C 1590
1410
Specific Heat Capacity, J/kg-K 550
470
Thermal Conductivity, W/m-K 8.1
51
Thermal Expansion, µm/m-K 9.1
12

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 1.4
7.2
Electrical Conductivity: Equal Weight (Specific), % IACS 2.7
8.3

Otherwise Unclassified Properties

Base Metal Price, % relative 37
1.9
Density, g/cm3 4.5
7.8
Embodied Carbon, kg CO2/kg material 36
1.4
Embodied Energy, MJ/kg 580
19
Embodied Water, L/kg 150
48

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 89 to 110
78 to 110
Resilience: Unit (Modulus of Resilience), kJ/m3 1380 to 3220
240 to 1040
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 35
24
Strength to Weight: Axial, points 43 to 60
19 to 26
Strength to Weight: Bending, points 39 to 48
19 to 23
Thermal Diffusivity, mm2/s 3.3
14
Thermal Shock Resistance, points 52 to 71
17 to 23

Alloy Composition

Aluminum (Al), % 2.5 to 3.5
0
Carbon (C), % 0 to 0.080
0.38 to 0.43
Hydrogen (H), % 0 to 0.015
0
Iron (Fe), % 0 to 0.25
97.2 to 97.9
Manganese (Mn), % 0
1.6 to 1.9
Nitrogen (N), % 0 to 0.030
0
Oxygen (O), % 0 to 0.15
0
Phosphorus (P), % 0
0 to 0.035
Silicon (Si), % 0
0.15 to 0.35
Sulfur (S), % 0
0 to 0.040
Titanium (Ti), % 92.6 to 95.5
0
Vanadium (V), % 2.0 to 3.0
0
Residuals, % 0 to 0.4
0

Comparable Variants