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ACI-ASTM CN3M Steel vs. 308.0 Aluminum

ACI-ASTM CN3M steel belongs to the iron alloys classification, while 308.0 aluminum belongs to the aluminum alloys. There are 30 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 ACI-ASTM CN3M steel and the bottom bar is 308.0 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 140
70
Elastic (Young's, Tensile) Modulus, GPa 200
73
Elongation at Break, % 34
2.0
Fatigue Strength, MPa 150
89
Poisson's Ratio 0.28
0.33
Shear Modulus, GPa 80
27
Tensile Strength: Ultimate (UTS), MPa 500
190
Tensile Strength: Yield (Proof), MPa 190
110

Thermal Properties

Latent Heat of Fusion, J/g 310
470
Maximum Temperature: Mechanical, °C 1100
170
Melting Completion (Liquidus), °C 1450
620
Melting Onset (Solidus), °C 1400
540
Specific Heat Capacity, J/kg-K 470
870
Thermal Conductivity, W/m-K 13
140
Thermal Expansion, µm/m-K 16
20

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 1.7
37
Electrical Conductivity: Equal Weight (Specific), % IACS 1.9
110

Otherwise Unclassified Properties

Base Metal Price, % relative 31
10
Density, g/cm3 8.1
2.9
Embodied Carbon, kg CO2/kg material 5.9
7.7
Embodied Energy, MJ/kg 80
140
Embodied Water, L/kg 200
1080

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 130
3.3
Resilience: Unit (Modulus of Resilience), kJ/m3 89
83
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 24
47
Strength to Weight: Axial, points 17
18
Strength to Weight: Bending, points 17
25
Thermal Diffusivity, mm2/s 3.4
55
Thermal Shock Resistance, points 11
9.2

Alloy Composition

Aluminum (Al), % 0
85.7 to 91
Carbon (C), % 0 to 0.030
0
Chromium (Cr), % 20 to 22
0
Copper (Cu), % 0
4.0 to 5.0
Iron (Fe), % 42.4 to 52.5
0 to 1.0
Magnesium (Mg), % 0
0 to 0.1
Manganese (Mn), % 0 to 2.0
0 to 0.5
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
5.0 to 6.0
Sulfur (S), % 0 to 0.030
0
Titanium (Ti), % 0
0 to 0.25
Zinc (Zn), % 0
0 to 1.0
Residuals, % 0
0 to 0.5