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SAE-AISI 9254 Steel vs. 240.0 Aluminum

SAE-AISI 9254 steel belongs to the iron alloys classification, while 240.0 aluminum belongs to the aluminum alloys. There are 29 material properties with values for both materials. Properties with values for just one material (2, 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 9254 steel and the bottom bar is 240.0 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
72
Elongation at Break, % 20
1.0
Fatigue Strength, MPa 280
140
Poisson's Ratio 0.29
0.33
Shear Modulus, GPa 72
27
Tensile Strength: Ultimate (UTS), MPa 660
240
Tensile Strength: Yield (Proof), MPa 410
200

Thermal Properties

Latent Heat of Fusion, J/g 270
380
Maximum Temperature: Mechanical, °C 410
180
Melting Completion (Liquidus), °C 1440
600
Melting Onset (Solidus), °C 1400
520
Specific Heat Capacity, J/kg-K 480
860
Thermal Conductivity, W/m-K 46
96
Thermal Expansion, µm/m-K 13
22

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.4
23
Electrical Conductivity: Equal Weight (Specific), % IACS 8.6
65

Otherwise Unclassified Properties

Base Metal Price, % relative 2.2
12
Density, g/cm3 7.7
3.2
Embodied Carbon, kg CO2/kg material 1.5
8.7
Embodied Energy, MJ/kg 20
150
Embodied Water, L/kg 49
1100

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 110
2.2
Resilience: Unit (Modulus of Resilience), kJ/m3 450
280
Stiffness to Weight: Axial, points 13
12
Stiffness to Weight: Bending, points 25
43
Strength to Weight: Axial, points 24
20
Strength to Weight: Bending, points 22
26
Thermal Diffusivity, mm2/s 12
35
Thermal Shock Resistance, points 20
11

Alloy Composition

Aluminum (Al), % 0
81.7 to 86.9
Carbon (C), % 0.51 to 0.59
0
Chromium (Cr), % 0.6 to 0.8
0
Copper (Cu), % 0
7.0 to 9.0
Iron (Fe), % 96.1 to 97.1
0 to 0.5
Magnesium (Mg), % 0
5.5 to 6.5
Manganese (Mn), % 0.6 to 0.8
0.3 to 0.7
Nickel (Ni), % 0
0.3 to 0.7
Phosphorus (P), % 0 to 0.035
0
Silicon (Si), % 1.2 to 1.6
0 to 0.5
Sulfur (S), % 0 to 0.040
0
Titanium (Ti), % 0
0 to 0.2
Zinc (Zn), % 0
0 to 0.1
Residuals, % 0
0 to 0.15