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SAE-AISI F1 Steel vs. 4145 Aluminum

SAE-AISI F1 steel belongs to the iron alloys classification, while 4145 aluminum belongs to the aluminum alloys. There are 23 material properties with values for both materials. Properties with values for just one material (9, in this case) are not shown. Please note that the two materials have significantly dissimilar densities. This means that additional care is required when interpreting the data, because some material properties are based on units of mass, while others are based on units of area or volume.

For each property being compared, the top bar is SAE-AISI F1 steel and the bottom bar is 4145 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
73
Poisson's Ratio 0.29
0.33
Shear Modulus, GPa 72
28
Tensile Strength: Ultimate (UTS), MPa 620 to 2320
120

Thermal Properties

Latent Heat of Fusion, J/g 250
540
Melting Completion (Liquidus), °C 1480
590
Melting Onset (Solidus), °C 1430
520
Specific Heat Capacity, J/kg-K 470
880
Thermal Conductivity, W/m-K 45
100
Thermal Expansion, µm/m-K 13
21

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.3
26
Electrical Conductivity: Equal Weight (Specific), % IACS 8.3
84

Otherwise Unclassified Properties

Base Metal Price, % relative 5.0
10
Density, g/cm3 7.9
2.8
Embodied Carbon, kg CO2/kg material 1.7
7.6
Embodied Energy, MJ/kg 24
140
Embodied Water, L/kg 46
1040

Common Calculations

Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 24
50
Strength to Weight: Axial, points 22 to 82
12
Strength to Weight: Bending, points 20 to 49
19
Thermal Diffusivity, mm2/s 12
42
Thermal Shock Resistance, points 19 to 70
5.5

Alloy Composition


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Aluminum (Al), % 0
83 to 87.4
Carbon (C), % 1.0 to 1.3
0
Chromium (Cr), % 0
0 to 0.15
Copper (Cu), % 0
3.3 to 4.7
Iron (Fe), % 95.9 to 98
0 to 0.8
Magnesium (Mg), % 0
0 to 0.15
Manganese (Mn), % 0 to 0.5
0 to 0.15
Phosphorus (P), % 0 to 0.030
0
Silicon (Si), % 0.1 to 0.5
9.3 to 10.7
Sulfur (S), % 0 to 0.030
0
Tungsten (W), % 1.0 to 1.8
0
Zinc (Zn), % 0
0 to 0.2
Residuals, % 0
0 to 0.15