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SAE-AISI M6 Steel vs. Grade 27 Titanium

SAE-AISI M6 steel belongs to the iron alloys classification, while grade 27 titanium belongs to the titanium 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 SAE-AISI M6 steel and the bottom bar is grade 27 titanium.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
110
Poisson's Ratio 0.29
0.32
Shear Modulus, GPa 77
41
Tensile Strength: Ultimate (UTS), MPa 840 to 2210
270

Thermal Properties

Latent Heat of Fusion, J/g 260
420
Melting Completion (Liquidus), °C 1560
1660
Melting Onset (Solidus), °C 1510
1610
Specific Heat Capacity, J/kg-K 440
540
Thermal Conductivity, W/m-K 17
21
Thermal Expansion, µm/m-K 12
8.7

Otherwise Unclassified Properties

Base Metal Price, % relative 39
37
Density, g/cm3 8.4
4.5
Embodied Carbon, kg CO2/kg material 8.0
33
Embodied Energy, MJ/kg 120
530
Embodied Water, L/kg 160
320

Common Calculations

Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 23
35
Strength to Weight: Axial, points 28 to 73
17
Strength to Weight: Bending, points 24 to 45
21
Thermal Diffusivity, mm2/s 4.7
8.8
Thermal Shock Resistance, points 26 to 68
21

Alloy Composition

Carbon (C), % 0.75 to 0.85
0 to 0.080
Chromium (Cr), % 3.8 to 4.5
0
Cobalt (Co), % 11 to 13
0
Hydrogen (H), % 0
0 to 0.015
Iron (Fe), % 68.8 to 74.6
0 to 0.2
Manganese (Mn), % 0.15 to 0.4
0
Molybdenum (Mo), % 4.5 to 5.5
0
Nitrogen (N), % 0
0 to 0.030
Oxygen (O), % 0
0 to 0.18
Phosphorus (P), % 0 to 0.030
0
Ruthenium (Ru), % 0
0.080 to 0.14
Silicon (Si), % 0.2 to 0.45
0
Sulfur (S), % 0 to 0.030
0
Titanium (Ti), % 0
99 to 99.92
Tungsten (W), % 3.8 to 4.8
0
Vanadium (V), % 1.3 to 1.7
0
Residuals, % 0
0 to 0.4