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238.0 Aluminum vs. ASTM Grade LC9 Steel

238.0 aluminum belongs to the aluminum alloys classification, while ASTM grade LC9 steel belongs to the iron alloys. There are 27 material properties with values for both materials. Properties with values for just one material (4, 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 238.0 aluminum and the bottom bar is ASTM grade LC9 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 76
190
Elongation at Break, % 1.5
22
Fatigue Strength, MPa 110
420
Poisson's Ratio 0.33
0.29
Shear Modulus, GPa 28
73
Tensile Strength: Ultimate (UTS), MPa 210
660
Tensile Strength: Yield (Proof), MPa 170
590

Thermal Properties

Latent Heat of Fusion, J/g 430
260
Maximum Temperature: Mechanical, °C 170
430
Melting Completion (Liquidus), °C 600
1450
Melting Onset (Solidus), °C 510
1410
Specific Heat Capacity, J/kg-K 840
470
Thermal Expansion, µm/m-K 21
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 25
8.9
Electrical Conductivity: Equal Weight (Specific), % IACS 67
10

Otherwise Unclassified Properties

Base Metal Price, % relative 12
8.0
Density, g/cm3 3.4
7.9
Embodied Carbon, kg CO2/kg material 7.4
2.3
Embodied Energy, MJ/kg 140
31
Embodied Water, L/kg 1040
65

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 2.9
140
Resilience: Unit (Modulus of Resilience), kJ/m3 180
920
Stiffness to Weight: Axial, points 12
13
Stiffness to Weight: Bending, points 42
24
Strength to Weight: Axial, points 17
23
Strength to Weight: Bending, points 23
21
Thermal Shock Resistance, points 9.1
20

Alloy Composition

Aluminum (Al), % 81.9 to 84.9
0
Carbon (C), % 0
0 to 0.13
Chromium (Cr), % 0
0 to 0.5
Copper (Cu), % 9.5 to 10.5
0 to 0.3
Iron (Fe), % 1.0 to 1.5
87.4 to 91.5
Magnesium (Mg), % 0 to 0.25
0
Manganese (Mn), % 0
0 to 0.9
Molybdenum (Mo), % 0
0 to 0.2
Nickel (Ni), % 0
8.5 to 10
Phosphorus (P), % 0
0 to 0.040
Silicon (Si), % 3.6 to 4.4
0 to 0.45
Sulfur (S), % 0
0 to 0.045
Vanadium (V), % 0
0 to 0.030
Zinc (Zn), % 1.0 to 1.5
0