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ACI-ASTM CN3M Steel vs. 7076 Aluminum

ACI-ASTM CN3M steel belongs to the iron alloys classification, while 7076 aluminum belongs to the aluminum 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 ACI-ASTM CN3M steel and the bottom bar is 7076 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 140
160
Elastic (Young's, Tensile) Modulus, GPa 200
70
Elongation at Break, % 34
6.2
Fatigue Strength, MPa 150
170
Poisson's Ratio 0.28
0.32
Shear Modulus, GPa 80
27
Tensile Strength: Ultimate (UTS), MPa 500
530
Tensile Strength: Yield (Proof), MPa 190
460

Thermal Properties

Latent Heat of Fusion, J/g 310
380
Maximum Temperature: Mechanical, °C 1100
170
Melting Completion (Liquidus), °C 1450
630
Melting Onset (Solidus), °C 1400
460
Specific Heat Capacity, J/kg-K 470
860
Thermal Conductivity, W/m-K 13
140
Thermal Expansion, µm/m-K 16
24

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 1.7
35
Electrical Conductivity: Equal Weight (Specific), % IACS 1.9
100

Otherwise Unclassified Properties

Base Metal Price, % relative 31
9.5
Density, g/cm3 8.1
3.0
Embodied Carbon, kg CO2/kg material 5.9
8.0
Embodied Energy, MJ/kg 80
150
Embodied Water, L/kg 200
1110

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 130
31
Resilience: Unit (Modulus of Resilience), kJ/m3 89
1510
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 24
45
Strength to Weight: Axial, points 17
49
Strength to Weight: Bending, points 17
48
Thermal Diffusivity, mm2/s 3.4
54
Thermal Shock Resistance, points 11
23

Alloy Composition

Aluminum (Al), % 0
86.9 to 91.2
Carbon (C), % 0 to 0.030
0
Chromium (Cr), % 20 to 22
0
Copper (Cu), % 0
0.3 to 1.0
Iron (Fe), % 42.4 to 52.5
0 to 0.6
Magnesium (Mg), % 0
1.2 to 2.0
Manganese (Mn), % 0 to 2.0
0.3 to 0.8
Molybdenum (Mo), % 4.5 to 5.5
0
Nickel (Ni), % 23 to 27
0
Phosphorus (P), % 0 to 0.030
0
Silicon (Si), % 0 to 1.0
0 to 0.4
Sulfur (S), % 0 to 0.030
0
Titanium (Ti), % 0
0 to 0.2
Zinc (Zn), % 0
7.0 to 8.0
Residuals, % 0
0 to 0.15