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ACI-ASTM CK20 Steel vs. 1050A Aluminum

ACI-ASTM CK20 steel belongs to the iron alloys classification, while 1050A 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 CK20 steel and the bottom bar is 1050A aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 150
20 to 45
Elastic (Young's, Tensile) Modulus, GPa 200
68
Elongation at Break, % 37
1.1 to 33
Fatigue Strength, MPa 220
22 to 55
Poisson's Ratio 0.28
0.33
Shear Modulus, GPa 78
26
Tensile Strength: Ultimate (UTS), MPa 530
68 to 170
Tensile Strength: Yield (Proof), MPa 260
22 to 150

Thermal Properties

Latent Heat of Fusion, J/g 310
400
Maximum Temperature: Mechanical, °C 1100
170
Melting Completion (Liquidus), °C 1400
660
Melting Onset (Solidus), °C 1430
650
Specific Heat Capacity, J/kg-K 480
900
Thermal Conductivity, W/m-K 14
230
Thermal Expansion, µm/m-K 15
24

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.0
59
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
1200

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 160
1.9 to 19
Resilience: Unit (Modulus of Resilience), kJ/m3 170
3.7 to 160
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
50
Strength to Weight: Axial, points 19
6.9 to 18
Strength to Weight: Bending, points 19
14 to 25
Thermal Diffusivity, mm2/s 3.7
94
Thermal Shock Resistance, points 13
3.0 to 7.6

Alloy Composition

Aluminum (Al), % 0
99.5 to 100
Carbon (C), % 0 to 0.2
0
Chromium (Cr), % 23 to 27
0
Copper (Cu), % 0
0 to 0.050
Iron (Fe), % 46.7 to 58
0 to 0.4
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 0.25
Sulfur (S), % 0 to 0.040
0
Titanium (Ti), % 0
0 to 0.050
Zinc (Zn), % 0
0 to 0.070