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Grade FDSiCr Steel vs. 3104 Aluminum

Grade FDSiCr steel belongs to the iron alloys classification, while 3104 aluminum belongs to the aluminum alloys. There are 24 material properties with values for both materials. Properties with values for just one material (8, 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 grade FDSiCr steel and the bottom bar is 3104 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
70
Poisson's Ratio 0.29
0.33
Shear Modulus, GPa 80
26
Tensile Strength: Ultimate (UTS), MPa 1930
170 to 310

Thermal Properties

Latent Heat of Fusion, J/g 270
400
Maximum Temperature: Mechanical, °C 410
180
Melting Completion (Liquidus), °C 1440
650
Melting Onset (Solidus), °C 1400
600
Specific Heat Capacity, J/kg-K 480
900
Thermal Conductivity, W/m-K 48
160
Thermal Expansion, µm/m-K 13
23

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.3
41
Electrical Conductivity: Equal Weight (Specific), % IACS 8.5
130

Otherwise Unclassified Properties

Base Metal Price, % relative 2.2
9.5
Density, g/cm3 7.7
2.8
Embodied Carbon, kg CO2/kg material 1.5
8.4
Embodied Energy, MJ/kg 20
150
Embodied Water, L/kg 48
1180

Common Calculations

Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 25
50
Strength to Weight: Axial, points 69
17 to 31
Strength to Weight: Bending, points 44
25 to 37
Thermal Diffusivity, mm2/s 13
64
Thermal Shock Resistance, points 58
7.6 to 13

Alloy Composition

Aluminum (Al), % 0
95.1 to 98.4
Carbon (C), % 0.5 to 0.6
0
Chromium (Cr), % 0.5 to 0.8
0
Copper (Cu), % 0 to 0.12
0.050 to 0.25
Gallium (Ga), % 0
0 to 0.050
Iron (Fe), % 96.5 to 97.8
0 to 0.8
Magnesium (Mg), % 0
0.8 to 1.3
Manganese (Mn), % 0.5 to 0.9
0.8 to 1.4
Phosphorus (P), % 0 to 0.030
0
Silicon (Si), % 1.2 to 1.6
0 to 0.6
Sulfur (S), % 0 to 0.025
0
Titanium (Ti), % 0
0 to 0.1
Vanadium (V), % 0
0 to 0.050
Zinc (Zn), % 0
0 to 0.25
Residuals, % 0
0 to 0.15