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Grade 38 Titanium vs. SAE-AISI 1008 Steel

Grade 38 titanium belongs to the titanium alloys classification, while SAE-AISI 1008 steel belongs to the iron alloys. There are 31 material properties with values for both materials. Properties with values for just one material (1, in this case) are not shown.

For each property being compared, the top bar is grade 38 titanium and the bottom bar is SAE-AISI 1008 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 110
190
Elongation at Break, % 11
22 to 33
Fatigue Strength, MPa 530
150 to 220
Poisson's Ratio 0.32
0.29
Reduction in Area, % 29
50 to 63
Shear Modulus, GPa 40
73
Shear Strength, MPa 600
220 to 230
Tensile Strength: Ultimate (UTS), MPa 1000
330 to 370
Tensile Strength: Yield (Proof), MPa 910
190 to 310

Thermal Properties

Latent Heat of Fusion, J/g 410
250
Maximum Temperature: Mechanical, °C 330
400
Melting Completion (Liquidus), °C 1620
1470
Melting Onset (Solidus), °C 1570
1430
Specific Heat Capacity, J/kg-K 550
470
Thermal Conductivity, W/m-K 8.0
62
Thermal Expansion, µm/m-K 9.3
12

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 1.2
6.9
Electrical Conductivity: Equal Weight (Specific), % IACS 2.4
7.9

Otherwise Unclassified Properties

Base Metal Price, % relative 36
1.8
Density, g/cm3 4.5
7.9
Embodied Carbon, kg CO2/kg material 35
1.4
Embodied Energy, MJ/kg 560
18
Embodied Water, L/kg 160
45

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 110
78 to 91
Resilience: Unit (Modulus of Resilience), kJ/m3 3840
92 to 260
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 35
24
Strength to Weight: Axial, points 62
12 to 13
Strength to Weight: Bending, points 49
13 to 15
Thermal Diffusivity, mm2/s 3.2
17
Thermal Shock Resistance, points 72
10 to 12

Alloy Composition

Aluminum (Al), % 3.5 to 4.5
0
Carbon (C), % 0 to 0.080
0 to 0.1
Hydrogen (H), % 0 to 0.015
0
Iron (Fe), % 1.2 to 1.8
99.31 to 99.7
Manganese (Mn), % 0
0.3 to 0.5
Nitrogen (N), % 0 to 0.030
0
Oxygen (O), % 0.2 to 0.3
0
Phosphorus (P), % 0
0 to 0.040
Sulfur (S), % 0
0 to 0.050
Titanium (Ti), % 89.9 to 93.1
0
Vanadium (V), % 2.0 to 3.0
0
Residuals, % 0 to 0.4
0