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SAE-AISI M6 Steel vs. 7049A Aluminum

SAE-AISI M6 steel belongs to the iron alloys classification, while 7049A 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 M6 steel and the bottom bar is 7049A aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
71
Poisson's Ratio 0.29
0.32
Shear Modulus, GPa 77
27
Tensile Strength: Ultimate (UTS), MPa 840 to 2210
580 to 590

Thermal Properties

Latent Heat of Fusion, J/g 260
370
Melting Completion (Liquidus), °C 1560
640
Melting Onset (Solidus), °C 1510
430
Specific Heat Capacity, J/kg-K 440
850
Thermal Conductivity, W/m-K 17
130
Thermal Expansion, µm/m-K 12
24

Otherwise Unclassified Properties

Base Metal Price, % relative 39
10
Density, g/cm3 8.4
3.1
Embodied Carbon, kg CO2/kg material 8.0
8.2
Embodied Energy, MJ/kg 120
150
Embodied Water, L/kg 160
1100

Common Calculations

Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 23
44
Strength to Weight: Axial, points 28 to 73
52 to 53
Strength to Weight: Bending, points 24 to 45
50 to 51
Thermal Diffusivity, mm2/s 4.7
50
Thermal Shock Resistance, points 26 to 68
25

Alloy Composition

Aluminum (Al), % 0
84.6 to 89.5
Carbon (C), % 0.75 to 0.85
0
Chromium (Cr), % 3.8 to 4.5
0.050 to 0.25
Cobalt (Co), % 11 to 13
0
Copper (Cu), % 0
1.2 to 1.9
Iron (Fe), % 68.8 to 74.6
0 to 0.5
Magnesium (Mg), % 0
2.1 to 3.1
Manganese (Mn), % 0.15 to 0.4
0 to 0.5
Molybdenum (Mo), % 4.5 to 5.5
0
Phosphorus (P), % 0 to 0.030
0
Silicon (Si), % 0.2 to 0.45
0 to 0.4
Sulfur (S), % 0 to 0.030
0
Titanium (Ti), % 0
0 to 0.25
Tungsten (W), % 3.8 to 4.8
0
Vanadium (V), % 1.3 to 1.7
0
Zinc (Zn), % 0
7.2 to 8.4
Zirconium (Zr), % 0
0 to 0.25
Residuals, % 0
0 to 0.15