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308.0 Aluminum vs. SAE-AISI M1 Steel

308.0 aluminum belongs to the aluminum alloys classification, while SAE-AISI M1 steel belongs to the iron alloys. There are 21 material properties with values for both materials. Properties with values for just one material (12, 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 308.0 aluminum and the bottom bar is SAE-AISI M1 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 73
200
Poisson's Ratio 0.33
0.29
Shear Modulus, GPa 27
77
Tensile Strength: Ultimate (UTS), MPa 190
730 to 2140

Thermal Properties

Latent Heat of Fusion, J/g 470
270
Melting Completion (Liquidus), °C 620
1560
Melting Onset (Solidus), °C 540
1510
Specific Heat Capacity, J/kg-K 870
450
Thermal Conductivity, W/m-K 140
29
Thermal Expansion, µm/m-K 20
12

Otherwise Unclassified Properties

Base Metal Price, % relative 10
18
Density, g/cm3 2.9
8.1
Embodied Carbon, kg CO2/kg material 7.7
7.0
Embodied Energy, MJ/kg 140
99
Embodied Water, L/kg 1080
98

Common Calculations

Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 47
24
Strength to Weight: Axial, points 18
25 to 73
Strength to Weight: Bending, points 25
22 to 45
Thermal Diffusivity, mm2/s 55
8.0
Thermal Shock Resistance, points 9.2
23 to 66

Alloy Composition

Aluminum (Al), % 85.7 to 91
0
Carbon (C), % 0
0.78 to 0.88
Chromium (Cr), % 0
3.5 to 4.0
Copper (Cu), % 4.0 to 5.0
0 to 0.25
Iron (Fe), % 0 to 1.0
81 to 84.8
Magnesium (Mg), % 0 to 0.1
0
Manganese (Mn), % 0 to 0.5
0.15 to 0.4
Molybdenum (Mo), % 0
8.2 to 9.2
Nickel (Ni), % 0
0 to 0.3
Phosphorus (P), % 0
0 to 0.030
Silicon (Si), % 5.0 to 6.0
0.2 to 0.5
Sulfur (S), % 0
0 to 0.030
Titanium (Ti), % 0 to 0.25
0
Tungsten (W), % 0
1.4 to 2.1
Vanadium (V), % 0
1.0 to 1.4
Zinc (Zn), % 0 to 1.0
0
Residuals, % 0 to 0.5
0