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EN AC-44400 Aluminum vs. SAE-AISI 4720 Steel

EN AC-44400 aluminum belongs to the aluminum alloys classification, while SAE-AISI 4720 steel belongs to the iron alloys. There are 30 material properties with values for both materials. Properties with values for just one material (1, 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 EN AC-44400 aluminum and the bottom bar is SAE-AISI 4720 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 61
150
Elastic (Young's, Tensile) Modulus, GPa 71
190
Elongation at Break, % 4.1
25
Fatigue Strength, MPa 79
260
Poisson's Ratio 0.33
0.29
Shear Modulus, GPa 27
73
Tensile Strength: Ultimate (UTS), MPa 210
490
Tensile Strength: Yield (Proof), MPa 110
350

Thermal Properties

Latent Heat of Fusion, J/g 540
250
Maximum Temperature: Mechanical, °C 170
410
Melting Completion (Liquidus), °C 600
1460
Melting Onset (Solidus), °C 590
1420
Specific Heat Capacity, J/kg-K 900
470
Thermal Conductivity, W/m-K 140
39
Thermal Expansion, µm/m-K 22
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 33
7.3
Electrical Conductivity: Equal Weight (Specific), % IACS 110
8.4

Otherwise Unclassified Properties

Base Metal Price, % relative 9.5
2.9
Density, g/cm3 2.6
7.9
Embodied Carbon, kg CO2/kg material 7.8
1.6
Embodied Energy, MJ/kg 150
21
Embodied Water, L/kg 1080
50

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 7.3
110
Resilience: Unit (Modulus of Resilience), kJ/m3 85
330
Stiffness to Weight: Axial, points 15
13
Stiffness to Weight: Bending, points 54
24
Strength to Weight: Axial, points 23
17
Strength to Weight: Bending, points 31
18
Thermal Diffusivity, mm2/s 60
10
Thermal Shock Resistance, points 9.8
14

Alloy Composition

Aluminum (Al), % 87.1 to 92
0
Carbon (C), % 0
0.17 to 0.22
Chromium (Cr), % 0
0.35 to 0.55
Copper (Cu), % 0 to 0.1
0
Iron (Fe), % 0 to 0.65
96.7 to 97.8
Lead (Pb), % 0 to 0.050
0
Magnesium (Mg), % 0 to 0.1
0
Manganese (Mn), % 0 to 0.5
0.5 to 0.7
Molybdenum (Mo), % 0
0.15 to 0.25
Nickel (Ni), % 0 to 0.050
0.9 to 1.2
Phosphorus (P), % 0
0 to 0.035
Silicon (Si), % 8.0 to 11
0.15 to 0.35
Sulfur (S), % 0
0 to 0.040
Tin (Sn), % 0 to 0.050
0
Titanium (Ti), % 0 to 0.15
0
Zinc (Zn), % 0 to 0.15
0
Residuals, % 0 to 0.15
0