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4145 Aluminum vs. EN 1.0038 Steel

4145 aluminum belongs to the aluminum alloys classification, while EN 1.0038 steel belongs to the iron alloys. There are 30 material properties with values for both materials. Properties with values for just one material (3, 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 1.0038 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 73
190
Elongation at Break, % 2.2
23 to 25
Fatigue Strength, MPa 48
140 to 160
Poisson's Ratio 0.33
0.29
Shear Modulus, GPa 28
73
Shear Strength, MPa 69
240 to 270
Tensile Strength: Ultimate (UTS), MPa 120
380 to 430
Tensile Strength: Yield (Proof), MPa 68
200 to 220

Thermal Properties

Latent Heat of Fusion, J/g 540
250
Maximum Temperature: Mechanical, °C 160
400
Melting Completion (Liquidus), °C 590
1460
Melting Onset (Solidus), °C 520
1420
Specific Heat Capacity, J/kg-K 880
470
Thermal Conductivity, W/m-K 100
49
Thermal Expansion, µm/m-K 21
12

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 26
7.2
Electrical Conductivity: Equal Weight (Specific), % IACS 84
8.3

Otherwise Unclassified Properties

Base Metal Price, % relative 10
2.1
Density, g/cm3 2.8
7.8
Embodied Carbon, kg CO2/kg material 7.6
1.4
Embodied Energy, MJ/kg 140
19
Embodied Water, L/kg 1040
48

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 2.3
72 to 88
Resilience: Unit (Modulus of Resilience), kJ/m3 31
110 to 130
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 50
24
Strength to Weight: Axial, points 12
13 to 15
Strength to Weight: Bending, points 19
15 to 16
Thermal Diffusivity, mm2/s 42
13
Thermal Shock Resistance, points 5.5
12 to 13

Alloy Composition


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Aluminum (Al), % 83 to 87.4
0
Carbon (C), % 0
0 to 0.23
Chromium (Cr), % 0 to 0.15
0 to 0.3
Copper (Cu), % 3.3 to 4.7
0 to 0.6
Iron (Fe), % 0 to 0.8
97.1 to 100
Magnesium (Mg), % 0 to 0.15
0
Manganese (Mn), % 0 to 0.15
0 to 1.5
Molybdenum (Mo), % 0
0 to 0.080
Nickel (Ni), % 0
0 to 0.3
Nitrogen (N), % 0
0 to 0.014
Phosphorus (P), % 0
0 to 0.045
Silicon (Si), % 9.3 to 10.7
0 to 0.55
Sulfur (S), % 0
0 to 0.045
Zinc (Zn), % 0 to 0.2
0
Residuals, % 0 to 0.15
0