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204.0 Aluminum vs. ACI-ASTM CF8 Steel

204.0 aluminum belongs to the aluminum alloys classification, while ACI-ASTM CF8 steel belongs to the iron 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 204.0 aluminum and the bottom bar is ACI-ASTM CF8 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 90 to 120
140
Elastic (Young's, Tensile) Modulus, GPa 71
200
Elongation at Break, % 5.7 to 7.8
55
Fatigue Strength, MPa 63 to 77
260
Poisson's Ratio 0.33
0.28
Shear Modulus, GPa 27
77
Tensile Strength: Ultimate (UTS), MPa 230 to 340
540
Tensile Strength: Yield (Proof), MPa 180 to 220
260

Thermal Properties

Latent Heat of Fusion, J/g 390
300
Maximum Temperature: Mechanical, °C 170
980
Melting Completion (Liquidus), °C 650
1420
Melting Onset (Solidus), °C 580
1430
Specific Heat Capacity, J/kg-K 880
480
Thermal Conductivity, W/m-K 120
16
Thermal Expansion, µm/m-K 19
15

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 29 to 34
2.0
Electrical Conductivity: Equal Weight (Specific), % IACS 87 to 100
2.3

Otherwise Unclassified Properties

Base Metal Price, % relative 11
16
Density, g/cm3 3.0
7.8
Embodied Carbon, kg CO2/kg material 8.0
3.1
Embodied Energy, MJ/kg 150
44
Embodied Water, L/kg 1150
150

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 12 to 23
240
Resilience: Unit (Modulus of Resilience), kJ/m3 220 to 350
160
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 46
25
Strength to Weight: Axial, points 21 to 31
19
Strength to Weight: Bending, points 28 to 36
19
Thermal Diffusivity, mm2/s 46
4.3
Thermal Shock Resistance, points 12 to 18
13

Alloy Composition

Aluminum (Al), % 93.4 to 95.5
0
Carbon (C), % 0
0 to 0.080
Chromium (Cr), % 0
18 to 21
Copper (Cu), % 4.2 to 5.0
0
Iron (Fe), % 0 to 0.35
63.8 to 74
Magnesium (Mg), % 0.15 to 0.35
0
Manganese (Mn), % 0 to 0.1
0 to 1.5
Molybdenum (Mo), % 0
0 to 0.5
Nickel (Ni), % 0 to 0.050
8.0 to 11
Phosphorus (P), % 0
0 to 0.040
Silicon (Si), % 0 to 0.2
0 to 2.0
Sulfur (S), % 0
0 to 0.040
Tin (Sn), % 0 to 0.050
0
Titanium (Ti), % 0.15 to 0.3
0
Zinc (Zn), % 0 to 0.1
0
Residuals, % 0 to 0.15
0