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4115 Aluminum vs. ACI-ASTM CD4MCuN Steel

4115 aluminum belongs to the aluminum alloys classification, while ACI-ASTM CD4MCuN steel belongs to the iron alloys. There are 29 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 4115 aluminum and the bottom bar is ACI-ASTM CD4MCuN steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 70
200
Elongation at Break, % 1.1 to 11
18
Fatigue Strength, MPa 39 to 76
340
Poisson's Ratio 0.33
0.27
Shear Modulus, GPa 26
79
Tensile Strength: Ultimate (UTS), MPa 120 to 220
770
Tensile Strength: Yield (Proof), MPa 39 to 190
550

Thermal Properties

Latent Heat of Fusion, J/g 420
300
Maximum Temperature: Mechanical, °C 160
1100
Melting Completion (Liquidus), °C 640
1420
Melting Onset (Solidus), °C 590
1380
Specific Heat Capacity, J/kg-K 900
480
Thermal Conductivity, W/m-K 160
17
Thermal Expansion, µm/m-K 23
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 41
2.2
Electrical Conductivity: Equal Weight (Specific), % IACS 140
2.5

Otherwise Unclassified Properties

Base Metal Price, % relative 9.5
18
Density, g/cm3 2.7
7.8
Embodied Carbon, kg CO2/kg material 8.1
3.5
Embodied Energy, MJ/kg 150
49
Embodied Water, L/kg 1160
180

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 2.1 to 10
130
Resilience: Unit (Modulus of Resilience), kJ/m3 11 to 270
760
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 50
25
Strength to Weight: Axial, points 12 to 23
28
Strength to Weight: Bending, points 20 to 30
24
Thermal Diffusivity, mm2/s 66
4.5
Thermal Shock Resistance, points 5.2 to 9.9
21

Alloy Composition

Aluminum (Al), % 94.6 to 97.4
0
Carbon (C), % 0
0 to 0.040
Chromium (Cr), % 0
24.5 to 26.5
Copper (Cu), % 0.1 to 0.5
2.7 to 3.3
Iron (Fe), % 0 to 0.7
59.5 to 66.3
Magnesium (Mg), % 0.1 to 0.5
0
Manganese (Mn), % 0.6 to 1.2
0 to 1.0
Molybdenum (Mo), % 0
1.7 to 2.3
Nickel (Ni), % 0
4.7 to 6.0
Nitrogen (N), % 0
0.1 to 0.25
Phosphorus (P), % 0
0 to 0.040
Silicon (Si), % 1.8 to 2.2
0 to 1.0
Sulfur (S), % 0
0 to 0.040
Zinc (Zn), % 0 to 0.2
0
Residuals, % 0 to 0.15
0