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238.0 Aluminum vs. ACI-ASTM CA6N Steel

238.0 aluminum belongs to the aluminum alloys classification, while ACI-ASTM CA6N 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 ACI-ASTM CA6N steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 76
190
Elongation at Break, % 1.5
17
Fatigue Strength, MPa 110
640
Poisson's Ratio 0.33
0.28
Shear Modulus, GPa 28
75
Tensile Strength: Ultimate (UTS), MPa 210
1080
Tensile Strength: Yield (Proof), MPa 170
1060

Thermal Properties

Latent Heat of Fusion, J/g 430
280
Maximum Temperature: Mechanical, °C 170
740
Melting Completion (Liquidus), °C 600
1440
Melting Onset (Solidus), °C 510
1400
Specific Heat Capacity, J/kg-K 840
480
Thermal Conductivity, W/m-K 100
23
Thermal Expansion, µm/m-K 21
9.9

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 25
2.6
Electrical Conductivity: Equal Weight (Specific), % IACS 67
3.0

Otherwise Unclassified Properties

Base Metal Price, % relative 12
11
Density, g/cm3 3.4
7.8
Embodied Carbon, kg CO2/kg material 7.4
2.5
Embodied Energy, MJ/kg 140
35
Embodied Water, L/kg 1040
110

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 2.9
180
Resilience: Unit (Modulus of Resilience), kJ/m3 180
2900
Stiffness to Weight: Axial, points 12
14
Stiffness to Weight: Bending, points 42
25
Strength to Weight: Axial, points 17
38
Strength to Weight: Bending, points 23
30
Thermal Diffusivity, mm2/s 37
6.1
Thermal Shock Resistance, points 9.1
40

Alloy Composition

Aluminum (Al), % 81.9 to 84.9
0
Carbon (C), % 0
0 to 0.060
Chromium (Cr), % 0
10.5 to 12.5
Copper (Cu), % 9.5 to 10.5
0
Iron (Fe), % 1.0 to 1.5
77.9 to 83.5
Magnesium (Mg), % 0 to 0.25
0
Manganese (Mn), % 0
0 to 0.5
Nickel (Ni), % 0
6.0 to 8.0
Phosphorus (P), % 0
0 to 0.020
Silicon (Si), % 3.6 to 4.4
0 to 1.0
Sulfur (S), % 0
0 to 0.020
Zinc (Zn), % 1.0 to 1.5
0