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6070 Aluminum vs. ACI-ASTM CN3M Steel

6070 aluminum belongs to the aluminum alloys classification, while ACI-ASTM CN3M 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 6070 aluminum and the bottom bar is ACI-ASTM CN3M steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 70
200
Elongation at Break, % 5.6 to 8.6
34
Fatigue Strength, MPa 95 to 130
150
Poisson's Ratio 0.33
0.28
Shear Modulus, GPa 26
80
Tensile Strength: Ultimate (UTS), MPa 370 to 380
500
Tensile Strength: Yield (Proof), MPa 350
190

Thermal Properties

Latent Heat of Fusion, J/g 410
310
Maximum Temperature: Mechanical, °C 160
1100
Melting Completion (Liquidus), °C 650
1450
Melting Onset (Solidus), °C 570
1400
Specific Heat Capacity, J/kg-K 900
470
Thermal Conductivity, W/m-K 160
13
Thermal Expansion, µm/m-K 23
16

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 41
1.7
Electrical Conductivity: Equal Weight (Specific), % IACS 140
1.9

Otherwise Unclassified Properties

Base Metal Price, % relative 9.5
31
Density, g/cm3 2.7
8.1
Embodied Carbon, kg CO2/kg material 8.3
5.9
Embodied Energy, MJ/kg 150
80
Embodied Water, L/kg 1170
200

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 20 to 32
130
Resilience: Unit (Modulus of Resilience), kJ/m3 880 to 900
89
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 50
24
Strength to Weight: Axial, points 38
17
Strength to Weight: Bending, points 42 to 43
17
Thermal Diffusivity, mm2/s 65
3.4
Thermal Shock Resistance, points 16 to 17
11

Alloy Composition

Aluminum (Al), % 94.6 to 98
0
Carbon (C), % 0
0 to 0.030
Chromium (Cr), % 0 to 0.1
20 to 22
Copper (Cu), % 0.15 to 0.4
0
Iron (Fe), % 0 to 0.5
42.4 to 52.5
Magnesium (Mg), % 0.5 to 1.2
0
Manganese (Mn), % 0.4 to 1.0
0 to 2.0
Molybdenum (Mo), % 0
4.5 to 5.5
Nickel (Ni), % 0
23 to 27
Phosphorus (P), % 0
0 to 0.030
Silicon (Si), % 1.0 to 1.7
0 to 1.0
Sulfur (S), % 0
0 to 0.030
Titanium (Ti), % 0 to 0.15
0
Zinc (Zn), % 0 to 0.25
0
Residuals, % 0 to 0.15
0