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ACI-ASTM CN7MS Steel vs. 5254 Aluminum

ACI-ASTM CN7MS steel belongs to the iron alloys classification, while 5254 aluminum belongs to the aluminum alloys. There are 27 material properties with values for both materials. Properties with values for just one material (6, 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 CN7MS steel and the bottom bar is 5254 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
68
Elongation at Break, % 39
3.4 to 22
Fatigue Strength, MPa 200
110 to 160
Poisson's Ratio 0.28
0.33
Shear Modulus, GPa 77
26
Tensile Strength: Ultimate (UTS), MPa 540
240 to 350
Tensile Strength: Yield (Proof), MPa 230
100 to 270

Thermal Properties

Latent Heat of Fusion, J/g 340
400
Maximum Temperature: Mechanical, °C 1040
190
Melting Completion (Liquidus), °C 1400
640
Melting Onset (Solidus), °C 1350
590
Specific Heat Capacity, J/kg-K 480
900
Thermal Conductivity, W/m-K 12
130
Thermal Expansion, µm/m-K 16
24

Otherwise Unclassified Properties

Base Metal Price, % relative 28
9.5
Density, g/cm3 7.9
2.7
Embodied Carbon, kg CO2/kg material 5.1
8.8
Embodied Energy, MJ/kg 71
150
Embodied Water, L/kg 180
1180

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 170
11 to 41
Resilience: Unit (Modulus of Resilience), kJ/m3 140
73 to 550
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
51
Strength to Weight: Axial, points 19
25 to 37
Strength to Weight: Bending, points 19
32 to 41
Thermal Diffusivity, mm2/s 3.2
52
Thermal Shock Resistance, points 13
10 to 16

Alloy Composition

Aluminum (Al), % 0
94.4 to 96.8
Carbon (C), % 0 to 0.070
0
Chromium (Cr), % 18 to 20
0.15 to 0.35
Copper (Cu), % 1.5 to 2.0
0 to 0.050
Iron (Fe), % 45.4 to 53.5
0 to 0.45
Magnesium (Mg), % 0
3.1 to 3.9
Manganese (Mn), % 0 to 1.0
0 to 0.010
Molybdenum (Mo), % 2.5 to 3.0
0
Nickel (Ni), % 22 to 25
0
Phosphorus (P), % 0 to 0.040
0
Silicon (Si), % 2.5 to 3.5
0 to 0.45
Sulfur (S), % 0 to 0.030
0
Titanium (Ti), % 0
0 to 0.050
Zinc (Zn), % 0
0 to 0.2
Residuals, % 0
0 to 0.15