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ACI-ASTM CN3MN Steel vs. 771.0 Aluminum

ACI-ASTM CN3MN steel belongs to the iron alloys classification, while 771.0 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 CN3MN steel and the bottom bar is 771.0 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 180
85 to 120
Elastic (Young's, Tensile) Modulus, GPa 210
70
Elongation at Break, % 39
1.7 to 6.5
Fatigue Strength, MPa 250
92 to 180
Poisson's Ratio 0.28
0.32
Shear Modulus, GPa 80
26
Tensile Strength: Ultimate (UTS), MPa 620
250 to 370
Tensile Strength: Yield (Proof), MPa 300
210 to 350

Thermal Properties

Latent Heat of Fusion, J/g 310
380
Maximum Temperature: Mechanical, °C 1100
180
Melting Completion (Liquidus), °C 1460
630
Melting Onset (Solidus), °C 1410
620
Specific Heat Capacity, J/kg-K 460
870
Thermal Conductivity, W/m-K 13
140 to 150
Thermal Expansion, µm/m-K 16
24

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 1.8
27
Electrical Conductivity: Equal Weight (Specific), % IACS 2.0
82

Otherwise Unclassified Properties

Base Metal Price, % relative 33
9.5
Density, g/cm3 8.1
3.0
Embodied Carbon, kg CO2/kg material 6.2
8.0
Embodied Energy, MJ/kg 84
150
Embodied Water, L/kg 200
1130

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 200
4.4 to 20
Resilience: Unit (Modulus of Resilience), kJ/m3 210
310 to 900
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 24
46
Strength to Weight: Axial, points 21
23 to 35
Strength to Weight: Bending, points 20
29 to 39
Thermal Diffusivity, mm2/s 3.4
54 to 58
Thermal Shock Resistance, points 14
11 to 16

Alloy Composition


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Aluminum (Al), % 0
90.5 to 92.5
Carbon (C), % 0 to 0.030
0
Chromium (Cr), % 20 to 22
0.060 to 0.2
Copper (Cu), % 0 to 0.75
0 to 0.1
Iron (Fe), % 41.4 to 50.3
0 to 0.15
Magnesium (Mg), % 0
0.8 to 1.0
Manganese (Mn), % 0 to 2.0
0 to 0.1
Molybdenum (Mo), % 6.0 to 7.0
0
Nickel (Ni), % 23.5 to 25.5
0
Nitrogen (N), % 0.18 to 0.26
0
Phosphorus (P), % 0 to 0.040
0
Silicon (Si), % 0 to 1.0
0 to 0.15
Sulfur (S), % 0 to 0.010
0
Titanium (Ti), % 0
0.1 to 0.2
Zinc (Zn), % 0
6.5 to 7.5
Residuals, % 0
0 to 0.15