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238.0 Aluminum vs. SAE-AISI 1055 Steel

238.0 aluminum belongs to the aluminum alloys classification, while SAE-AISI 1055 steel belongs to the iron alloys. There are 29 material properties with values for both materials. Properties with values for just one material (3, 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 SAE-AISI 1055 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 76
190
Elongation at Break, % 1.5
11 to 14
Fatigue Strength, MPa 110
260 to 390
Poisson's Ratio 0.33
0.29
Shear Modulus, GPa 28
72
Tensile Strength: Ultimate (UTS), MPa 210
730 to 750
Tensile Strength: Yield (Proof), MPa 170
400 to 630

Thermal Properties

Latent Heat of Fusion, J/g 430
250
Maximum Temperature: Mechanical, °C 170
400
Melting Completion (Liquidus), °C 600
1460
Melting Onset (Solidus), °C 510
1420
Specific Heat Capacity, J/kg-K 840
470
Thermal Conductivity, W/m-K 100
51
Thermal Expansion, µm/m-K 21
12

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 25
11
Electrical Conductivity: Equal Weight (Specific), % IACS 67
12

Otherwise Unclassified Properties

Base Metal Price, % relative 12
1.8
Density, g/cm3 3.4
7.8
Embodied Carbon, kg CO2/kg material 7.4
1.4
Embodied Energy, MJ/kg 140
18
Embodied Water, L/kg 1040
46

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 2.9
80 to 85
Resilience: Unit (Modulus of Resilience), kJ/m3 180
440 to 1070
Stiffness to Weight: Axial, points 12
13
Stiffness to Weight: Bending, points 42
24
Strength to Weight: Axial, points 17
26
Strength to Weight: Bending, points 23
23
Thermal Diffusivity, mm2/s 37
14
Thermal Shock Resistance, points 9.1
23 to 24

Alloy Composition

Aluminum (Al), % 81.9 to 84.9
0
Carbon (C), % 0
0.5 to 0.6
Copper (Cu), % 9.5 to 10.5
0
Iron (Fe), % 1.0 to 1.5
98.4 to 98.9
Magnesium (Mg), % 0 to 0.25
0
Manganese (Mn), % 0
0.6 to 0.9
Phosphorus (P), % 0
0 to 0.040
Silicon (Si), % 3.6 to 4.4
0
Sulfur (S), % 0
0 to 0.050
Zinc (Zn), % 1.0 to 1.5
0