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ACI-ASTM CF20 Steel vs. 319.0 Aluminum

ACI-ASTM CF20 steel belongs to the iron alloys classification, while 319.0 aluminum belongs to the aluminum alloys. There are 30 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 CF20 steel and the bottom bar is 319.0 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 160
78 to 84
Elastic (Young's, Tensile) Modulus, GPa 200
72
Elongation at Break, % 50
1.8 to 2.0
Fatigue Strength, MPa 240
76 to 80
Poisson's Ratio 0.28
0.33
Shear Modulus, GPa 77
27
Tensile Strength: Ultimate (UTS), MPa 530
190 to 240
Tensile Strength: Yield (Proof), MPa 250
110 to 180

Thermal Properties

Latent Heat of Fusion, J/g 300
480
Maximum Temperature: Mechanical, °C 970
170
Melting Completion (Liquidus), °C 1420
600
Melting Onset (Solidus), °C 1410
540
Specific Heat Capacity, J/kg-K 480
880
Thermal Conductivity, W/m-K 16
110
Thermal Expansion, µm/m-K 17
22

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.0
27
Electrical Conductivity: Equal Weight (Specific), % IACS 2.3
84

Otherwise Unclassified Properties

Base Metal Price, % relative 16
10
Density, g/cm3 7.8
2.9
Embodied Carbon, kg CO2/kg material 3.1
7.7
Embodied Energy, MJ/kg 44
140
Embodied Water, L/kg 150
1080

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 220
3.3 to 3.9
Resilience: Unit (Modulus of Resilience), kJ/m3 160
88 to 220
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
48
Strength to Weight: Axial, points 19
18 to 24
Strength to Weight: Bending, points 19
25 to 30
Thermal Diffusivity, mm2/s 4.3
44
Thermal Shock Resistance, points 11
8.6 to 11

Alloy Composition

Aluminum (Al), % 0
85.8 to 91.5
Carbon (C), % 0 to 0.2
0
Chromium (Cr), % 18 to 21
0
Copper (Cu), % 0
3.0 to 4.0
Iron (Fe), % 64.2 to 74
0 to 1.0
Magnesium (Mg), % 0
0 to 0.1
Manganese (Mn), % 0 to 1.5
0 to 0.5
Nickel (Ni), % 8.0 to 11
0 to 0.35
Phosphorus (P), % 0 to 0.040
0
Silicon (Si), % 0 to 2.0
5.5 to 6.5
Sulfur (S), % 0 to 0.040
0
Titanium (Ti), % 0
0 to 0.25
Zinc (Zn), % 0
0 to 1.0
Residuals, % 0
0 to 0.5