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SAE-AISI M3 Class 1 Steel vs. Grade 37 Titanium

SAE-AISI M3 class 1 steel belongs to the iron alloys classification, while grade 37 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 M3 class 1 steel and the bottom bar is grade 37 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
40
Tensile Strength: Ultimate (UTS), MPa 770 to 2150
390

Thermal Properties

Latent Heat of Fusion, J/g 260
420
Melting Completion (Liquidus), °C 1610
1650
Melting Onset (Solidus), °C 1570
1600
Specific Heat Capacity, J/kg-K 440
550
Thermal Conductivity, W/m-K 26
21
Thermal Expansion, µm/m-K 12
8.9

Otherwise Unclassified Properties

Base Metal Price, % relative 25
36
Density, g/cm3 8.3
4.5
Embodied Carbon, kg CO2/kg material 10
31
Embodied Energy, MJ/kg 150
500
Embodied Water, L/kg 100
120

Common Calculations

Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 23
35
Strength to Weight: Axial, points 26 to 72
24
Strength to Weight: Bending, points 22 to 44
26
Thermal Diffusivity, mm2/s 7.2
8.4
Thermal Shock Resistance, points 24 to 67
29

Alloy Composition


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Aluminum (Al), % 0
1.0 to 2.0
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
96.9 to 99
Tungsten (W), % 5.0 to 6.8
0
Vanadium (V), % 2.3 to 2.8
0
Residuals, % 0
0 to 0.4