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SAE-AISI H24 Steel vs. 5251 Aluminum

SAE-AISI H24 steel belongs to the iron alloys classification, while 5251 aluminum belongs to the aluminum alloys. There are 21 material properties with values for both materials. Properties with values for just one material (11, 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 SAE-AISI H24 steel and the bottom bar is 5251 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
68
Poisson's Ratio 0.29
0.33
Shear Modulus, GPa 78
26
Tensile Strength: Ultimate (UTS), MPa 720 to 1990
180 to 280

Thermal Properties

Latent Heat of Fusion, J/g 240
400
Melting Completion (Liquidus), °C 1750
650
Melting Onset (Solidus), °C 1700
610
Specific Heat Capacity, J/kg-K 420
900
Thermal Conductivity, W/m-K 27
150
Thermal Expansion, µm/m-K 12
24

Otherwise Unclassified Properties

Base Metal Price, % relative 37
9.5
Density, g/cm3 9.1
2.7
Embodied Carbon, kg CO2/kg material 6.1
8.5
Embodied Energy, MJ/kg 93
150
Embodied Water, L/kg 78
1180

Common Calculations

Stiffness to Weight: Axial, points 12
14
Stiffness to Weight: Bending, points 22
50
Strength to Weight: Axial, points 22 to 61
18 to 29
Strength to Weight: Bending, points 20 to 39
26 to 35
Thermal Diffusivity, mm2/s 6.9
61
Thermal Shock Resistance, points 22 to 61
7.9 to 13

Alloy Composition

Aluminum (Al), % 0
95.5 to 98.2
Carbon (C), % 0.42 to 0.53
0
Chromium (Cr), % 2.5 to 3.5
0 to 0.15
Copper (Cu), % 0 to 0.25
0 to 0.15
Iron (Fe), % 78 to 82.4
0 to 0.5
Magnesium (Mg), % 0
1.7 to 2.4
Manganese (Mn), % 0.15 to 0.4
0.1 to 0.5
Nickel (Ni), % 0 to 0.3
0
Phosphorus (P), % 0 to 0.030
0
Silicon (Si), % 0.15 to 0.4
0 to 0.4
Sulfur (S), % 0 to 0.030
0
Titanium (Ti), % 0
0 to 0.15
Tungsten (W), % 14 to 16
0
Vanadium (V), % 0.4 to 0.6
0
Zinc (Zn), % 0
0 to 0.15
Residuals, % 0
0 to 0.15

Comparable Variants