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EN AC-45400 Aluminum vs. SAE-AISI H25 Steel

EN AC-45400 aluminum belongs to the aluminum alloys classification, while SAE-AISI H25 steel belongs to the iron alloys. There are 21 material properties with values for both materials. Properties with values for just one material (10, 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-45400 aluminum and the bottom bar is SAE-AISI H25 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 72
200
Poisson's Ratio 0.33
0.29
Shear Modulus, GPa 27
79
Tensile Strength: Ultimate (UTS), MPa 260
710 to 1620

Thermal Properties

Latent Heat of Fusion, J/g 470
250
Melting Completion (Liquidus), °C 630
1750
Melting Onset (Solidus), °C 560
1700
Specific Heat Capacity, J/kg-K 880
420
Thermal Conductivity, W/m-K 140
26
Thermal Expansion, µm/m-K 22
12

Otherwise Unclassified Properties

Base Metal Price, % relative 10
38
Density, g/cm3 2.8
9.1
Embodied Carbon, kg CO2/kg material 7.8
6.2
Embodied Energy, MJ/kg 150
93
Embodied Water, L/kg 1100
83

Common Calculations

Stiffness to Weight: Axial, points 14
12
Stiffness to Weight: Bending, points 49
22
Strength to Weight: Axial, points 25
22 to 50
Strength to Weight: Bending, points 32
20 to 34
Thermal Diffusivity, mm2/s 54
6.7
Thermal Shock Resistance, points 12
22 to 49

Alloy Composition

Aluminum (Al), % 88.4 to 92.9
0
Carbon (C), % 0
0.22 to 0.32
Chromium (Cr), % 0
3.8 to 4.5
Copper (Cu), % 2.6 to 3.6
0 to 0.25
Iron (Fe), % 0 to 0.6
77.2 to 81.3
Lead (Pb), % 0 to 0.1
0
Magnesium (Mg), % 0 to 0.050
0
Manganese (Mn), % 0 to 0.55
0.15 to 0.4
Nickel (Ni), % 0 to 0.1
0 to 0.3
Phosphorus (P), % 0
0 to 0.030
Silicon (Si), % 4.5 to 6.0
0.15 to 0.4
Sulfur (S), % 0
0 to 0.030
Tin (Sn), % 0 to 0.050
0
Titanium (Ti), % 0 to 0.25
0
Tungsten (W), % 0
14 to 16
Vanadium (V), % 0
0.4 to 0.6
Zinc (Zn), % 0 to 0.2
0
Residuals, % 0 to 0.15
0