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EN AC-45300 Aluminum vs. SAE-AISI M7 Steel

EN AC-45300 aluminum belongs to the aluminum alloys classification, while SAE-AISI M7 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-45300 aluminum and the bottom bar is SAE-AISI M7 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 71
200
Poisson's Ratio 0.33
0.29
Shear Modulus, GPa 27
77
Tensile Strength: Ultimate (UTS), MPa 220 to 290
760 to 2210

Thermal Properties

Latent Heat of Fusion, J/g 470
270
Melting Completion (Liquidus), °C 630
1560
Melting Onset (Solidus), °C 590
1510
Specific Heat Capacity, J/kg-K 890
450
Thermal Conductivity, W/m-K 150
28
Thermal Expansion, µm/m-K 22
12

Otherwise Unclassified Properties

Base Metal Price, % relative 9.5
18
Density, g/cm3 2.7
8.1
Embodied Carbon, kg CO2/kg material 8.0
8.9
Embodied Energy, MJ/kg 150
130
Embodied Water, L/kg 1120
100

Common Calculations

Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 50
24
Strength to Weight: Axial, points 23 to 29
26 to 76
Strength to Weight: Bending, points 30 to 35
23 to 47
Thermal Diffusivity, mm2/s 60
7.8
Thermal Shock Resistance, points 10 to 13
24 to 69

Alloy Composition

Aluminum (Al), % 90.2 to 94.2
0
Carbon (C), % 0
1.0 to 1.1
Chromium (Cr), % 0
3.5 to 4.0
Copper (Cu), % 1.0 to 1.5
0 to 0.25
Iron (Fe), % 0 to 0.65
79.8 to 83.8
Lead (Pb), % 0 to 0.15
0
Magnesium (Mg), % 0.35 to 0.65
0
Manganese (Mn), % 0 to 0.55
0.15 to 0.4
Molybdenum (Mo), % 0
8.2 to 9.2
Nickel (Ni), % 0 to 0.25
0 to 0.3
Phosphorus (P), % 0
0 to 0.030
Silicon (Si), % 4.5 to 5.5
0.2 to 0.55
Sulfur (S), % 0
0 to 0.030
Tin (Sn), % 0 to 0.050
0
Titanium (Ti), % 0 to 0.25
0
Tungsten (W), % 0
1.4 to 2.1
Vanadium (V), % 0
1.8 to 2.3
Zinc (Zn), % 0 to 0.15
0
Residuals, % 0 to 0.15
0