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SAE-AISI M50 Steel vs. 7050 Aluminum

SAE-AISI M50 steel belongs to the iron alloys classification, while 7050 aluminum belongs to the aluminum alloys. There are 23 material properties with values for both materials. Properties with values for just one material (8, 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 M50 steel and the bottom bar is 7050 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
70
Poisson's Ratio 0.29
0.32
Shear Modulus, GPa 75
26
Tensile Strength: Ultimate (UTS), MPa 720 to 2250
490 to 570

Thermal Properties

Latent Heat of Fusion, J/g 260
370
Melting Completion (Liquidus), °C 1480
630
Melting Onset (Solidus), °C 1440
490
Specific Heat Capacity, J/kg-K 470
860
Thermal Conductivity, W/m-K 35
140
Thermal Expansion, µm/m-K 13
24

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 8.7
35
Electrical Conductivity: Equal Weight (Specific), % IACS 10
100

Otherwise Unclassified Properties

Base Metal Price, % relative 9.0
10
Density, g/cm3 7.9
3.1
Embodied Carbon, kg CO2/kg material 5.1
8.2
Embodied Energy, MJ/kg 74
150
Embodied Water, L/kg 83
1120

Common Calculations

Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 25
45
Strength to Weight: Axial, points 26 to 80
45 to 51
Strength to Weight: Bending, points 23 to 49
45 to 50
Thermal Diffusivity, mm2/s 9.7
54
Thermal Shock Resistance, points 21 to 66
21 to 25

Alloy Composition

Aluminum (Al), % 0
87.3 to 92.1
Carbon (C), % 0.78 to 0.88
0
Chromium (Cr), % 3.8 to 4.5
0 to 0.040
Copper (Cu), % 0 to 0.25
2.0 to 2.6
Iron (Fe), % 87 to 90.4
0 to 0.15
Magnesium (Mg), % 0
1.9 to 2.6
Manganese (Mn), % 0.15 to 0.45
0 to 0.1
Molybdenum (Mo), % 3.9 to 4.8
0
Nickel (Ni), % 0 to 0.3
0
Phosphorus (P), % 0 to 0.030
0
Silicon (Si), % 0.2 to 0.6
0 to 0.12
Sulfur (S), % 0 to 0.030
0
Titanium (Ti), % 0
0 to 0.060
Vanadium (V), % 0.8 to 1.3
0
Zinc (Zn), % 0
5.7 to 6.7
Zirconium (Zr), % 0
0.080 to 0.15
Residuals, % 0
0 to 0.15