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SAE-AISI M3 Class 1 Steel vs. Grade 2 Titanium

SAE-AISI M3 class 1 steel belongs to the iron alloys classification, while grade 2 titanium belongs to the titanium alloys. There are 21 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 M3 class 1 steel and the bottom bar is grade 2 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 770 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 26
22
Thermal Expansion, µm/m-K 12
9.0

Otherwise Unclassified Properties

Base Metal Price, % relative 25
37
Density, g/cm3 8.3
4.5
Embodied Carbon, kg CO2/kg material 10
31
Embodied Energy, MJ/kg 150
510
Embodied Water, L/kg 100
110

Common Calculations

Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 23
35
Strength to Weight: Axial, points 26 to 72
26
Strength to Weight: Bending, points 22 to 44
28
Thermal Diffusivity, mm2/s 7.2
8.9
Thermal Shock Resistance, points 24 to 67
32

Alloy Composition


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Carbon (C), % 1.0 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), % 76.9 to 82.9
0 to 0.3
Manganese (Mn), % 0.15 to 0.4
0
Molybdenum (Mo), % 4.8 to 6.5
0
Nickel (Ni), % 0 to 0.3
0
Nitrogen (N), % 0
0 to 0.030
Oxygen (O), % 0
0 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
98.9 to 100
Tungsten (W), % 5.0 to 6.8
0
Vanadium (V), % 2.3 to 2.8
0
Residuals, % 0
0 to 0.4