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242.0-O Aluminum vs. Annealed SAE-AISI M50

242.0-O aluminum belongs to the aluminum alloys classification, while annealed SAE-AISI M50 belongs to the iron alloys. There are 24 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 242.0-O aluminum and the bottom bar is annealed SAE-AISI M50.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 70
220
Elastic (Young's, Tensile) Modulus, GPa 73
190
Poisson's Ratio 0.33
0.29
Shear Modulus, GPa 27
75
Tensile Strength: Ultimate (UTS), MPa 180
720

Thermal Properties

Latent Heat of Fusion, J/g 390
260
Melting Completion (Liquidus), °C 640
1480
Melting Onset (Solidus), °C 530
1440
Specific Heat Capacity, J/kg-K 870
470
Thermal Conductivity, W/m-K 170
35
Thermal Expansion, µm/m-K 22
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 44
8.7
Electrical Conductivity: Equal Weight (Specific), % IACS 130
10

Otherwise Unclassified Properties

Base Metal Price, % relative 12
9.0
Density, g/cm3 3.1
7.9
Embodied Carbon, kg CO2/kg material 8.3
5.1
Embodied Energy, MJ/kg 150
74
Embodied Water, L/kg 1130
83

Common Calculations

Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 45
25
Strength to Weight: Axial, points 16
26
Strength to Weight: Bending, points 23
23
Thermal Diffusivity, mm2/s 62
9.7
Thermal Shock Resistance, points 8.0
21

Alloy Composition

Aluminum (Al), % 88.4 to 93.6
0
Carbon (C), % 0
0.78 to 0.88
Chromium (Cr), % 0 to 0.25
3.8 to 4.5
Copper (Cu), % 3.5 to 4.5
0 to 0.25
Iron (Fe), % 0 to 1.0
87 to 90.4
Magnesium (Mg), % 1.2 to 1.8
0
Manganese (Mn), % 0 to 0.35
0.15 to 0.45
Molybdenum (Mo), % 0
3.9 to 4.8
Nickel (Ni), % 1.7 to 2.3
0 to 0.3
Phosphorus (P), % 0
0 to 0.030
Silicon (Si), % 0 to 0.7
0.2 to 0.6
Sulfur (S), % 0
0 to 0.030
Titanium (Ti), % 0 to 0.25
0
Vanadium (V), % 0
0.8 to 1.3
Zinc (Zn), % 0 to 0.35
0
Residuals, % 0 to 0.15
0