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Grade 33 Titanium vs. SAE-AISI 4340 Steel

Grade 33 titanium belongs to the titanium alloys classification, while SAE-AISI 4340 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 33 titanium and the bottom bar is SAE-AISI 4340 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 110
190
Elongation at Break, % 23
12 to 22
Fatigue Strength, MPa 250
330 to 740
Poisson's Ratio 0.32
0.29
Shear Modulus, GPa 41
73
Shear Strength, MPa 240
430 to 770
Tensile Strength: Ultimate (UTS), MPa 390
690 to 1280
Tensile Strength: Yield (Proof), MPa 350
470 to 1150

Thermal Properties

Latent Heat of Fusion, J/g 420
250
Maximum Temperature: Mechanical, °C 320
430
Melting Completion (Liquidus), °C 1660
1460
Melting Onset (Solidus), °C 1610
1420
Specific Heat Capacity, J/kg-K 540
470
Thermal Conductivity, W/m-K 21
44
Thermal Expansion, µm/m-K 8.7
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 3.4
7.5
Electrical Conductivity: Equal Weight (Specific), % IACS 6.9
8.6

Otherwise Unclassified Properties

Base Metal Price, % relative 55
3.5
Density, g/cm3 4.5
7.8
Embodied Carbon, kg CO2/kg material 33
1.7
Embodied Energy, MJ/kg 530
22
Embodied Water, L/kg 200
53

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 86
79 to 170
Resilience: Unit (Modulus of Resilience), kJ/m3 590
590 to 3490
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 35
24
Strength to Weight: Axial, points 24
24 to 45
Strength to Weight: Bending, points 26
22 to 33
Thermal Diffusivity, mm2/s 8.7
12
Thermal Shock Resistance, points 30
20 to 38

Alloy Composition

Carbon (C), % 0 to 0.080
0.38 to 0.43
Chromium (Cr), % 0.1 to 0.2
0.7 to 0.9
Hydrogen (H), % 0 to 0.015
0
Iron (Fe), % 0 to 0.3
95.1 to 96.3
Manganese (Mn), % 0
0.6 to 0.8
Molybdenum (Mo), % 0
0.2 to 0.3
Nickel (Ni), % 0.35 to 0.55
1.7 to 2.0
Nitrogen (N), % 0 to 0.030
0
Oxygen (O), % 0 to 0.25
0
Palladium (Pd), % 0.010 to 0.020
0
Phosphorus (P), % 0
0 to 0.035
Ruthenium (Ru), % 0.020 to 0.040
0
Silicon (Si), % 0
0.15 to 0.35
Sulfur (S), % 0
0 to 0.040
Titanium (Ti), % 98.1 to 99.52
0
Residuals, % 0 to 0.4
0