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384.0 Aluminum vs. SAE-AISI M6 Steel

384.0 aluminum belongs to the aluminum alloys classification, while SAE-AISI M6 steel belongs to the iron alloys. There are 21 material properties with values for both materials. Properties with values for just one material (11, 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 384.0 aluminum and the bottom bar is SAE-AISI M6 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 74
200
Poisson's Ratio 0.33
0.29
Shear Modulus, GPa 28
77
Tensile Strength: Ultimate (UTS), MPa 330
840 to 2210

Thermal Properties

Latent Heat of Fusion, J/g 550
260
Melting Completion (Liquidus), °C 580
1560
Melting Onset (Solidus), °C 530
1510
Specific Heat Capacity, J/kg-K 870
440
Thermal Conductivity, W/m-K 96
17
Thermal Expansion, µm/m-K 21
12

Otherwise Unclassified Properties

Base Metal Price, % relative 11
39
Density, g/cm3 2.9
8.4
Embodied Carbon, kg CO2/kg material 7.4
8.0
Embodied Energy, MJ/kg 140
120
Embodied Water, L/kg 1010
160

Common Calculations

Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 49
23
Strength to Weight: Axial, points 32
28 to 73
Strength to Weight: Bending, points 37
24 to 45
Thermal Diffusivity, mm2/s 39
4.7
Thermal Shock Resistance, points 15
26 to 68

Alloy Composition

Aluminum (Al), % 77.3 to 86.5
0
Carbon (C), % 0
0.75 to 0.85
Chromium (Cr), % 0
3.8 to 4.5
Cobalt (Co), % 0
11 to 13
Copper (Cu), % 3.0 to 4.5
0
Iron (Fe), % 0 to 1.3
68.8 to 74.6
Magnesium (Mg), % 0 to 0.1
0
Manganese (Mn), % 0 to 0.5
0.15 to 0.4
Molybdenum (Mo), % 0
4.5 to 5.5
Nickel (Ni), % 0 to 0.5
0
Phosphorus (P), % 0
0 to 0.030
Silicon (Si), % 10.5 to 12
0.2 to 0.45
Sulfur (S), % 0
0 to 0.030
Tin (Sn), % 0 to 0.35
0
Tungsten (W), % 0
3.8 to 4.8
Vanadium (V), % 0
1.3 to 1.7
Zinc (Zn), % 0 to 3.0
0
Residuals, % 0 to 0.5
0