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4007 Aluminum vs. ACI-ASTM CK3MCuN Steel

4007 aluminum belongs to the aluminum alloys classification, while ACI-ASTM CK3MCuN 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 4007 aluminum and the bottom bar is ACI-ASTM CK3MCuN steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 32 to 44
180
Elastic (Young's, Tensile) Modulus, GPa 71
200
Elongation at Break, % 5.1 to 23
39
Fatigue Strength, MPa 46 to 88
250
Poisson's Ratio 0.33
0.28
Shear Modulus, GPa 27
80
Tensile Strength: Ultimate (UTS), MPa 130 to 160
620
Tensile Strength: Yield (Proof), MPa 50 to 120
290

Thermal Properties

Latent Heat of Fusion, J/g 410
300
Maximum Temperature: Mechanical, °C 170
1090
Melting Completion (Liquidus), °C 650
1460
Melting Onset (Solidus), °C 590
1350
Specific Heat Capacity, J/kg-K 890
460
Thermal Conductivity, W/m-K 170
12
Thermal Expansion, µm/m-K 23
16

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 42
1.9
Electrical Conductivity: Equal Weight (Specific), % IACS 140
2.1

Otherwise Unclassified Properties

Base Metal Price, % relative 9.5
29
Density, g/cm3 2.8
8.0
Embodied Carbon, kg CO2/kg material 8.1
5.6
Embodied Energy, MJ/kg 150
76
Embodied Water, L/kg 1160
190

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 7.4 to 23
200
Resilience: Unit (Modulus of Resilience), kJ/m3 18 to 110
210
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 49
24
Strength to Weight: Axial, points 12 to 15
21
Strength to Weight: Bending, points 20 to 23
20
Thermal Diffusivity, mm2/s 67
3.2
Thermal Shock Resistance, points 5.5 to 6.7
14

Alloy Composition

Aluminum (Al), % 94.1 to 97.6
0
Carbon (C), % 0
0 to 0.025
Chromium (Cr), % 0.050 to 0.25
19.5 to 20.5
Cobalt (Co), % 0 to 0.050
0
Copper (Cu), % 0 to 0.2
0.5 to 1.0
Iron (Fe), % 0.4 to 1.0
49.5 to 56.3
Magnesium (Mg), % 0 to 0.2
0
Manganese (Mn), % 0.8 to 1.5
0 to 1.2
Molybdenum (Mo), % 0
6.0 to 7.0
Nickel (Ni), % 0.15 to 0.7
17.5 to 19.5
Nitrogen (N), % 0
0.18 to 0.24
Phosphorus (P), % 0
0 to 0.045
Silicon (Si), % 1.0 to 1.7
0 to 1.0
Sulfur (S), % 0
0 to 0.010
Titanium (Ti), % 0 to 0.1
0
Zinc (Zn), % 0 to 0.1
0
Residuals, % 0 to 0.15
0