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ACI-ASTM CK20 Steel vs. 1435 Aluminum

ACI-ASTM CK20 steel belongs to the iron alloys classification, while 1435 aluminum belongs to the aluminum alloys. There are 29 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 ACI-ASTM CK20 steel and the bottom bar is 1435 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
69
Elongation at Break, % 37
4.1 to 32
Fatigue Strength, MPa 220
27 to 49
Poisson's Ratio 0.28
0.33
Shear Modulus, GPa 78
26
Tensile Strength: Ultimate (UTS), MPa 530
81 to 150
Tensile Strength: Yield (Proof), MPa 260
23 to 130

Thermal Properties

Latent Heat of Fusion, J/g 310
400
Maximum Temperature: Mechanical, °C 1100
170
Melting Completion (Liquidus), °C 1400
650
Melting Onset (Solidus), °C 1430
640
Specific Heat Capacity, J/kg-K 480
900
Thermal Conductivity, W/m-K 14
230
Thermal Expansion, µm/m-K 15
23

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.0
60
Electrical Conductivity: Equal Weight (Specific), % IACS 2.3
200

Otherwise Unclassified Properties

Base Metal Price, % relative 25
9.0
Density, g/cm3 7.8
2.7
Embodied Carbon, kg CO2/kg material 4.4
8.2
Embodied Energy, MJ/kg 62
150
Embodied Water, L/kg 190
1190

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 160
5.0 to 20
Resilience: Unit (Modulus of Resilience), kJ/m3 170
3.8 to 110
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
50
Strength to Weight: Axial, points 19
8.3 to 15
Strength to Weight: Bending, points 19
15 to 23
Thermal Diffusivity, mm2/s 3.7
93
Thermal Shock Resistance, points 13
3.6 to 6.7

Alloy Composition

Aluminum (Al), % 0
99.35 to 99.7
Carbon (C), % 0 to 0.2
0
Chromium (Cr), % 23 to 27
0
Copper (Cu), % 0
0 to 0.020
Iron (Fe), % 46.7 to 58
0.3 to 0.5
Magnesium (Mg), % 0
0 to 0.050
Manganese (Mn), % 0 to 2.0
0 to 0.050
Molybdenum (Mo), % 0 to 0.5
0
Nickel (Ni), % 19 to 22
0
Phosphorus (P), % 0 to 0.040
0
Silicon (Si), % 0 to 2.0
0 to 0.15
Sulfur (S), % 0 to 0.040
0
Titanium (Ti), % 0
0 to 0.030
Zinc (Zn), % 0
0 to 0.1