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4147 Aluminum vs. SAE-AISI 9254 Steel

4147 aluminum belongs to the aluminum alloys classification, while SAE-AISI 9254 steel belongs to the iron alloys. There are 30 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 4147 aluminum and the bottom bar is SAE-AISI 9254 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 72
190
Elongation at Break, % 3.3
20
Fatigue Strength, MPa 42
280
Poisson's Ratio 0.33
0.29
Shear Modulus, GPa 27
72
Shear Strength, MPa 63
410
Tensile Strength: Ultimate (UTS), MPa 110
660
Tensile Strength: Yield (Proof), MPa 59
410

Thermal Properties

Latent Heat of Fusion, J/g 570
270
Maximum Temperature: Mechanical, °C 160
410
Melting Completion (Liquidus), °C 580
1440
Melting Onset (Solidus), °C 560
1400
Specific Heat Capacity, J/kg-K 900
480
Thermal Conductivity, W/m-K 130
46
Thermal Expansion, µm/m-K 21
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 33
7.4
Electrical Conductivity: Equal Weight (Specific), % IACS 120
8.6

Otherwise Unclassified Properties

Base Metal Price, % relative 9.5
2.2
Density, g/cm3 2.5
7.7
Embodied Carbon, kg CO2/kg material 7.7
1.5
Embodied Energy, MJ/kg 140
20
Embodied Water, L/kg 1050
49

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 3.1
110
Resilience: Unit (Modulus of Resilience), kJ/m3 24
450
Stiffness to Weight: Axial, points 16
13
Stiffness to Weight: Bending, points 55
25
Strength to Weight: Axial, points 12
24
Strength to Weight: Bending, points 20
22
Thermal Diffusivity, mm2/s 58
12
Thermal Shock Resistance, points 5.2
20

Alloy Composition

Aluminum (Al), % 85 to 88.9
0
Beryllium (Be), % 0 to 0.00030
0
Carbon (C), % 0
0.51 to 0.59
Chromium (Cr), % 0
0.6 to 0.8
Copper (Cu), % 0 to 0.25
0
Iron (Fe), % 0 to 0.8
96.1 to 97.1
Magnesium (Mg), % 0.1 to 0.5
0
Manganese (Mn), % 0 to 0.1
0.6 to 0.8
Phosphorus (P), % 0
0 to 0.035
Silicon (Si), % 11 to 13
1.2 to 1.6
Sulfur (S), % 0
0 to 0.040
Zinc (Zn), % 0 to 0.2
0
Residuals, % 0 to 0.15
0