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242.0-O Aluminum vs. Annealed SAE-AISI M3 Class 2

242.0-O aluminum belongs to the aluminum alloys classification, while annealed SAE-AISI M3 class 2 belongs to the iron alloys. There are 22 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 242.0-O aluminum and the bottom bar is annealed SAE-AISI M3 class 2.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 70
230
Elastic (Young's, Tensile) Modulus, GPa 73
200
Poisson's Ratio 0.33
0.29
Shear Modulus, GPa 27
77
Tensile Strength: Ultimate (UTS), MPa 180
770

Thermal Properties

Latent Heat of Fusion, J/g 390
260
Melting Completion (Liquidus), °C 640
1620
Melting Onset (Solidus), °C 530
1570
Specific Heat Capacity, J/kg-K 870
440
Thermal Conductivity, W/m-K 170
26
Thermal Expansion, µm/m-K 22
12

Otherwise Unclassified Properties

Base Metal Price, % relative 12
25
Density, g/cm3 3.1
8.3
Embodied Carbon, kg CO2/kg material 8.3
12
Embodied Energy, MJ/kg 150
180
Embodied Water, L/kg 1130
110

Common Calculations

Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 45
23
Strength to Weight: Axial, points 16
26
Strength to Weight: Bending, points 23
22
Thermal Diffusivity, mm2/s 62
7.2
Thermal Shock Resistance, points 8.0
24

Alloy Composition

Aluminum (Al), % 88.4 to 93.6
0
Carbon (C), % 0
1.2 to 1.3
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
75.8 to 82.3
Magnesium (Mg), % 1.2 to 1.8
0
Manganese (Mn), % 0 to 0.35
0.15 to 0.4
Molybdenum (Mo), % 0
4.8 to 6.5
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 0.45
Sulfur (S), % 0
0 to 0.030
Titanium (Ti), % 0 to 0.25
0
Tungsten (W), % 0
5.0 to 6.8
Vanadium (V), % 0
2.8 to 3.8
Zinc (Zn), % 0 to 0.35
0
Residuals, % 0 to 0.15
0