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Grade 38 Titanium vs. SAE-AISI M6 Steel

Grade 38 titanium belongs to the titanium alloys classification, while SAE-AISI M6 steel belongs to the iron alloys. There are 21 material properties with values for both materials. Properties with values for just one material (11, 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 M6 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 110
200
Poisson's Ratio 0.32
0.29
Shear Modulus, GPa 40
77
Tensile Strength: Ultimate (UTS), MPa 1000
840 to 2210

Thermal Properties

Latent Heat of Fusion, J/g 410
260
Melting Completion (Liquidus), °C 1620
1560
Melting Onset (Solidus), °C 1570
1510
Specific Heat Capacity, J/kg-K 550
440
Thermal Conductivity, W/m-K 8.0
17
Thermal Expansion, µm/m-K 9.3
12

Otherwise Unclassified Properties

Base Metal Price, % relative 36
39
Density, g/cm3 4.5
8.4
Embodied Carbon, kg CO2/kg material 35
8.0
Embodied Energy, MJ/kg 560
120
Embodied Water, L/kg 160
160

Common Calculations

Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 35
23
Strength to Weight: Axial, points 62
28 to 73
Strength to Weight: Bending, points 49
24 to 45
Thermal Diffusivity, mm2/s 3.2
4.7
Thermal Shock Resistance, points 72
26 to 68

Alloy Composition

Aluminum (Al), % 3.5 to 4.5
0
Carbon (C), % 0 to 0.080
0.75 to 0.85
Chromium (Cr), % 0
3.8 to 4.5
Cobalt (Co), % 0
11 to 13
Hydrogen (H), % 0 to 0.015
0
Iron (Fe), % 1.2 to 1.8
68.8 to 74.6
Manganese (Mn), % 0
0.15 to 0.4
Molybdenum (Mo), % 0
4.5 to 5.5
Nitrogen (N), % 0 to 0.030
0
Oxygen (O), % 0.2 to 0.3
0
Phosphorus (P), % 0
0 to 0.030
Silicon (Si), % 0
0.2 to 0.45
Sulfur (S), % 0
0 to 0.030
Titanium (Ti), % 89.9 to 93.1
0
Tungsten (W), % 0
3.8 to 4.8
Vanadium (V), % 2.0 to 3.0
1.3 to 1.7
Residuals, % 0 to 0.4
0