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SAE-AISI M2 Steel vs. Grade 7 Titanium

SAE-AISI M2 steel belongs to the iron alloys classification, while grade 7 titanium belongs to the titanium alloys. There are 20 material properties with values for both materials. Properties with values for just one material (13, in this case) are not shown.

For each property being compared, the top bar is SAE-AISI M2 steel and the bottom bar is grade 7 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
38
Tensile Strength: Ultimate (UTS), MPa 760 to 2150
420

Thermal Properties

Latent Heat of Fusion, J/g 260
420
Melting Completion (Liquidus), °C 1610
1660
Melting Onset (Solidus), °C 1570
1610
Specific Heat Capacity, J/kg-K 440
540
Thermal Conductivity, W/m-K 22
22
Thermal Expansion, µm/m-K 10
9.2

Otherwise Unclassified Properties

Density, g/cm3 8.4
4.5
Embodied Carbon, kg CO2/kg material 8.8
47
Embodied Energy, MJ/kg 130
800
Embodied Water, L/kg 98
470

Common Calculations

Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 23
35
Strength to Weight: Axial, points 25 to 71
26
Strength to Weight: Bending, points 22 to 44
28
Thermal Diffusivity, mm2/s 5.9
8.9
Thermal Shock Resistance, points 27 to 76
31

Alloy Composition


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Carbon (C), % 0.78 to 1.1
0 to 0.080
Chromium (Cr), % 3.8 to 4.5
0
Copper (Cu), % 0 to 0.25
0
Hydrogen (H), % 0
0 to 0.015
Iron (Fe), % 78.5 to 83.4
0 to 0.3
Manganese (Mn), % 0.15 to 0.4
0
Molybdenum (Mo), % 4.5 to 5.5
0
Nickel (Ni), % 0 to 0.3
0
Nitrogen (N), % 0
0 to 0.030
Oxygen (O), % 0
0 to 0.25
Palladium (Pd), % 0
0.12 to 0.25
Phosphorus (P), % 0 to 0.030
0
Silicon (Si), % 0.2 to 0.45
0
Sulfur (S), % 0 to 0.030
0
Titanium (Ti), % 0
98.7 to 99.88
Tungsten (W), % 5.5 to 6.8
0
Vanadium (V), % 1.8 to 2.2
0
Residuals, % 0
0 to 0.4