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ACI-ASTM CK35MN Steel vs. 2018 Aluminum

ACI-ASTM CK35MN steel belongs to the iron alloys classification, while 2018 aluminum belongs to the aluminum alloys. There are 30 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 ACI-ASTM CK35MN steel and the bottom bar is 2018 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 190
120
Elastic (Young's, Tensile) Modulus, GPa 210
73
Elongation at Break, % 40
9.6
Fatigue Strength, MPa 270
120
Poisson's Ratio 0.28
0.33
Shear Modulus, GPa 81
27
Tensile Strength: Ultimate (UTS), MPa 650
420
Tensile Strength: Yield (Proof), MPa 310
310

Thermal Properties

Latent Heat of Fusion, J/g 310
390
Maximum Temperature: Mechanical, °C 1100
220
Melting Completion (Liquidus), °C 1460
640
Melting Onset (Solidus), °C 1410
510
Specific Heat Capacity, J/kg-K 470
870
Thermal Conductivity, W/m-K 12
150
Thermal Expansion, µm/m-K 16
22

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 1.9
40
Electrical Conductivity: Equal Weight (Specific), % IACS 2.1
120

Otherwise Unclassified Properties

Base Metal Price, % relative 31
11
Density, g/cm3 8.0
3.1
Embodied Carbon, kg CO2/kg material 5.9
8.1
Embodied Energy, MJ/kg 81
150
Embodied Water, L/kg 210
1130

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 210
37
Resilience: Unit (Modulus of Resilience), kJ/m3 240
670
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 25
45
Strength to Weight: Axial, points 22
38
Strength to Weight: Bending, points 21
41
Thermal Diffusivity, mm2/s 3.3
57
Thermal Shock Resistance, points 14
19

Alloy Composition

Aluminum (Al), % 0
89.7 to 94.4
Carbon (C), % 0 to 0.035
0
Chromium (Cr), % 22 to 24
0 to 0.1
Copper (Cu), % 0 to 0.4
3.5 to 4.5
Iron (Fe), % 43.4 to 51.8
0 to 1.0
Magnesium (Mg), % 0
0.45 to 0.9
Manganese (Mn), % 0 to 2.0
0 to 0.2
Molybdenum (Mo), % 6.0 to 6.8
0
Nickel (Ni), % 20 to 22
1.7 to 2.3
Nitrogen (N), % 0.21 to 0.32
0
Phosphorus (P), % 0 to 0.035
0
Silicon (Si), % 0 to 1.0
0 to 0.9
Sulfur (S), % 0 to 0.020
0
Zinc (Zn), % 0
0 to 0.25
Residuals, % 0
0 to 0.15