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4145 Aluminum vs. EN 1.4107 Stainless Steel

4145 aluminum belongs to the aluminum alloys classification, while EN 1.4107 stainless steel belongs to the iron alloys. There are 29 material properties with values for both materials. Properties with values for just one material (5, 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 4145 aluminum and the bottom bar is EN 1.4107 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 73
190
Elongation at Break, % 2.2
18 to 21
Fatigue Strength, MPa 48
260 to 350
Poisson's Ratio 0.33
0.28
Shear Modulus, GPa 28
76
Tensile Strength: Ultimate (UTS), MPa 120
620 to 700
Tensile Strength: Yield (Proof), MPa 68
400 to 570

Thermal Properties

Latent Heat of Fusion, J/g 540
270
Maximum Temperature: Mechanical, °C 160
740
Melting Completion (Liquidus), °C 590
1450
Melting Onset (Solidus), °C 520
1410
Specific Heat Capacity, J/kg-K 880
480
Thermal Conductivity, W/m-K 100
27
Thermal Expansion, µm/m-K 21
10

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 26
2.9
Electrical Conductivity: Equal Weight (Specific), % IACS 84
3.3

Otherwise Unclassified Properties

Base Metal Price, % relative 10
7.5
Density, g/cm3 2.8
7.8
Embodied Carbon, kg CO2/kg material 7.6
2.1
Embodied Energy, MJ/kg 140
30
Embodied Water, L/kg 1040
100

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 2.3
110 to 120
Resilience: Unit (Modulus of Resilience), kJ/m3 31
420 to 840
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 50
25
Strength to Weight: Axial, points 12
22 to 25
Strength to Weight: Bending, points 19
21 to 22
Thermal Diffusivity, mm2/s 42
7.2
Thermal Shock Resistance, points 5.5
22 to 25

Alloy Composition


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Aluminum (Al), % 83 to 87.4
0
Carbon (C), % 0
0 to 0.1
Chromium (Cr), % 0 to 0.15
11.5 to 12.5
Copper (Cu), % 3.3 to 4.7
0 to 0.3
Iron (Fe), % 0 to 0.8
83.8 to 87.2
Magnesium (Mg), % 0 to 0.15
0
Manganese (Mn), % 0 to 0.15
0.5 to 0.8
Molybdenum (Mo), % 0
0 to 0.5
Nickel (Ni), % 0
0.8 to 1.5
Phosphorus (P), % 0
0 to 0.030
Silicon (Si), % 9.3 to 10.7
0 to 0.4
Sulfur (S), % 0
0 to 0.020
Vanadium (V), % 0
0 to 0.080
Zinc (Zn), % 0 to 0.2
0
Residuals, % 0 to 0.15
0