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SAE-AISI M6 Steel vs. 6101 Aluminum

SAE-AISI M6 steel belongs to the iron alloys classification, while 6101 aluminum belongs to the aluminum alloys. There are 17 material properties with values for both materials. Properties with values for just one material (9, 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 6101 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
68
Poisson's Ratio 0.29
0.33
Shear Modulus, GPa 77
26

Thermal Properties

Latent Heat of Fusion, J/g 260
400
Melting Completion (Liquidus), °C 1560
650
Melting Onset (Solidus), °C 1510
620
Specific Heat Capacity, J/kg-K 440
900
Thermal Conductivity, W/m-K 17
220 to 230
Thermal Expansion, µm/m-K 12
23

Otherwise Unclassified Properties

Base Metal Price, % relative 39
9.5
Density, g/cm3 8.4
2.7
Embodied Carbon, kg CO2/kg material 8.0
8.3
Embodied Energy, MJ/kg 120
150
Embodied Water, L/kg 160
1190

Common Calculations

Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 23
50
Thermal Diffusivity, mm2/s 4.7
89 to 93

Alloy Composition

Aluminum (Al), % 0
97.6 to 99.4
Boron (B), % 0
0 to 0.060
Carbon (C), % 0.75 to 0.85
0
Chromium (Cr), % 3.8 to 4.5
0 to 0.030
Cobalt (Co), % 11 to 13
0
Copper (Cu), % 0
0 to 0.1
Iron (Fe), % 68.8 to 74.6
0 to 0.5
Magnesium (Mg), % 0
0.35 to 0.8
Manganese (Mn), % 0.15 to 0.4
0 to 0.030
Molybdenum (Mo), % 4.5 to 5.5
0
Phosphorus (P), % 0 to 0.030
0
Silicon (Si), % 0.2 to 0.45
0.3 to 0.7
Sulfur (S), % 0 to 0.030
0
Tungsten (W), % 3.8 to 4.8
0
Vanadium (V), % 1.3 to 1.7
0
Zinc (Zn), % 0
0 to 0.1
Residuals, % 0
0 to 0.1