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SAE-AISI M3 Class 2 Steel vs. EN AC-45300 Aluminum

SAE-AISI M3 class 2 steel belongs to the iron alloys classification, while EN AC-45300 aluminum belongs to the aluminum 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 SAE-AISI M3 class 2 steel and the bottom bar is EN AC-45300 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
71
Poisson's Ratio 0.29
0.33
Shear Modulus, GPa 77
27
Tensile Strength: Ultimate (UTS), MPa 770 to 2210
220 to 290

Thermal Properties

Latent Heat of Fusion, J/g 260
470
Melting Completion (Liquidus), °C 1620
630
Melting Onset (Solidus), °C 1570
590
Specific Heat Capacity, J/kg-K 440
890
Thermal Conductivity, W/m-K 26
150
Thermal Expansion, µm/m-K 12
22

Otherwise Unclassified Properties

Base Metal Price, % relative 25
9.5
Density, g/cm3 8.3
2.7
Embodied Carbon, kg CO2/kg material 12
8.0
Embodied Energy, MJ/kg 180
150
Embodied Water, L/kg 110
1120

Common Calculations

Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 23
50
Strength to Weight: Axial, points 26 to 74
23 to 29
Strength to Weight: Bending, points 22 to 45
30 to 35
Thermal Diffusivity, mm2/s 7.2
60
Thermal Shock Resistance, points 24 to 69
10 to 13

Alloy Composition

Aluminum (Al), % 0
90.2 to 94.2
Carbon (C), % 1.2 to 1.3
0
Chromium (Cr), % 3.8 to 4.5
0
Copper (Cu), % 0 to 0.25
1.0 to 1.5
Iron (Fe), % 75.8 to 82.3
0 to 0.65
Lead (Pb), % 0
0 to 0.15
Magnesium (Mg), % 0
0.35 to 0.65
Manganese (Mn), % 0.15 to 0.4
0 to 0.55
Molybdenum (Mo), % 4.8 to 6.5
0
Nickel (Ni), % 0 to 0.3
0 to 0.25
Phosphorus (P), % 0 to 0.030
0
Silicon (Si), % 0.2 to 0.45
4.5 to 5.5
Sulfur (S), % 0 to 0.030
0
Tin (Sn), % 0
0 to 0.050
Titanium (Ti), % 0
0 to 0.25
Tungsten (W), % 5.0 to 6.8
0
Vanadium (V), % 2.8 to 3.8
0
Zinc (Zn), % 0
0 to 0.15
Residuals, % 0
0 to 0.15