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ACI-ASTM CA6N Steel vs. 4115 Aluminum

ACI-ASTM CA6N steel belongs to the iron alloys classification, while 4115 aluminum belongs to the aluminum alloys. There are 29 material properties with values for both materials. Properties with values for just one material (5, 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 CA6N steel and the bottom bar is 4115 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
70
Elongation at Break, % 17
1.1 to 11
Fatigue Strength, MPa 640
39 to 76
Poisson's Ratio 0.28
0.33
Shear Modulus, GPa 75
26
Tensile Strength: Ultimate (UTS), MPa 1080
120 to 220
Tensile Strength: Yield (Proof), MPa 1060
39 to 190

Thermal Properties

Latent Heat of Fusion, J/g 280
420
Maximum Temperature: Mechanical, °C 740
160
Melting Completion (Liquidus), °C 1440
640
Melting Onset (Solidus), °C 1400
590
Specific Heat Capacity, J/kg-K 480
900
Thermal Conductivity, W/m-K 23
160
Thermal Expansion, µm/m-K 9.9
23

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.6
41
Electrical Conductivity: Equal Weight (Specific), % IACS 3.0
140

Otherwise Unclassified Properties

Base Metal Price, % relative 11
9.5
Density, g/cm3 7.8
2.7
Embodied Carbon, kg CO2/kg material 2.5
8.1
Embodied Energy, MJ/kg 35
150
Embodied Water, L/kg 110
1160

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 180
2.1 to 10
Resilience: Unit (Modulus of Resilience), kJ/m3 2900
11 to 270
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
50
Strength to Weight: Axial, points 38
12 to 23
Strength to Weight: Bending, points 30
20 to 30
Thermal Diffusivity, mm2/s 6.1
66
Thermal Shock Resistance, points 40
5.2 to 9.9

Alloy Composition

Aluminum (Al), % 0
94.6 to 97.4
Carbon (C), % 0 to 0.060
0
Chromium (Cr), % 10.5 to 12.5
0
Copper (Cu), % 0
0.1 to 0.5
Iron (Fe), % 77.9 to 83.5
0 to 0.7
Magnesium (Mg), % 0
0.1 to 0.5
Manganese (Mn), % 0 to 0.5
0.6 to 1.2
Nickel (Ni), % 6.0 to 8.0
0
Phosphorus (P), % 0 to 0.020
0
Silicon (Si), % 0 to 1.0
1.8 to 2.2
Sulfur (S), % 0 to 0.020
0
Zinc (Zn), % 0
0 to 0.2
Residuals, % 0
0 to 0.15