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850.0 Aluminum vs. ACI-ASTM CF8 Steel

850.0 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 (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 850.0 aluminum and the bottom bar is ACI-ASTM CF8 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 45
140
Elastic (Young's, Tensile) Modulus, GPa 69
200
Elongation at Break, % 7.9
55
Fatigue Strength, MPa 59
260
Poisson's Ratio 0.33
0.28
Shear Modulus, GPa 26
77
Tensile Strength: Ultimate (UTS), MPa 140
540
Tensile Strength: Yield (Proof), MPa 76
260

Thermal Properties

Latent Heat of Fusion, J/g 380
300
Maximum Temperature: Mechanical, °C 190
980
Melting Completion (Liquidus), °C 650
1420
Melting Onset (Solidus), °C 370
1430
Specific Heat Capacity, J/kg-K 850
480
Thermal Conductivity, W/m-K 180
16
Thermal Expansion, µm/m-K 23
15

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 47
2.0
Electrical Conductivity: Equal Weight (Specific), % IACS 140
2.3

Otherwise Unclassified Properties

Base Metal Price, % relative 14
16
Density, g/cm3 3.1
7.8
Embodied Carbon, kg CO2/kg material 8.5
3.1
Embodied Energy, MJ/kg 160
44
Embodied Water, L/kg 1160
150

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 9.1
240
Resilience: Unit (Modulus of Resilience), kJ/m3 42
160
Stiffness to Weight: Axial, points 12
14
Stiffness to Weight: Bending, points 44
25
Strength to Weight: Axial, points 12
19
Strength to Weight: Bending, points 19
19
Thermal Diffusivity, mm2/s 69
4.3
Thermal Shock Resistance, points 6.1
13

Alloy Composition

Aluminum (Al), % 88.3 to 93.1
0
Carbon (C), % 0
0 to 0.080
Chromium (Cr), % 0
18 to 21
Copper (Cu), % 0.7 to 1.3
0
Iron (Fe), % 0 to 0.7
63.8 to 74
Magnesium (Mg), % 0 to 0.1
0
Manganese (Mn), % 0 to 0.1
0 to 1.5
Molybdenum (Mo), % 0
0 to 0.5
Nickel (Ni), % 0.7 to 1.3
8.0 to 11
Phosphorus (P), % 0
0 to 0.040
Silicon (Si), % 0 to 0.7
0 to 2.0
Sulfur (S), % 0
0 to 0.040
Tin (Sn), % 5.5 to 7.0
0
Titanium (Ti), % 0 to 0.2
0
Residuals, % 0 to 0.3
0