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4145 Aluminum vs. EN 1.6570 Steel

4145 aluminum belongs to the aluminum alloys classification, while EN 1.6570 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 1.6570 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 73
190
Elongation at Break, % 2.2
11 to 17
Fatigue Strength, MPa 48
500 to 660
Poisson's Ratio 0.33
0.29
Shear Modulus, GPa 28
73
Tensile Strength: Ultimate (UTS), MPa 120
910 to 1130
Tensile Strength: Yield (Proof), MPa 68
760 to 1060

Thermal Properties

Latent Heat of Fusion, J/g 540
250
Maximum Temperature: Mechanical, °C 160
440
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
40
Thermal Expansion, µm/m-K 21
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 26
7.7
Electrical Conductivity: Equal Weight (Specific), % IACS 84
8.8

Otherwise Unclassified Properties

Base Metal Price, % relative 10
3.9
Density, g/cm3 2.8
7.9
Embodied Carbon, kg CO2/kg material 7.6
1.7
Embodied Energy, MJ/kg 140
23
Embodied Water, L/kg 1040
56

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 2.3
120 to 140
Resilience: Unit (Modulus of Resilience), kJ/m3 31
1520 to 3010
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 50
24
Strength to Weight: Axial, points 12
32 to 40
Strength to Weight: Bending, points 19
27 to 31
Thermal Diffusivity, mm2/s 42
11
Thermal Shock Resistance, points 5.5
27 to 33

Alloy Composition


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Aluminum (Al), % 83 to 87.4
0
Carbon (C), % 0
0.28 to 0.35
Chromium (Cr), % 0 to 0.15
1.0 to 1.4
Copper (Cu), % 3.3 to 4.7
0
Iron (Fe), % 0 to 0.8
94 to 96.2
Magnesium (Mg), % 0 to 0.15
0
Manganese (Mn), % 0 to 0.15
0.6 to 1.0
Molybdenum (Mo), % 0
0.3 to 0.5
Nickel (Ni), % 0
1.6 to 2.1
Phosphorus (P), % 0
0 to 0.020
Silicon (Si), % 9.3 to 10.7
0 to 0.6
Sulfur (S), % 0
0 to 0.015
Zinc (Zn), % 0 to 0.2
0
Residuals, % 0 to 0.15
0