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4007 Aluminum vs. S41425 Stainless Steel

4007 aluminum belongs to the aluminum alloys classification, while S41425 stainless steel belongs to the iron alloys. There are 31 material properties with values for both materials. Properties with values for just one material (3, 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 4007 aluminum and the bottom bar is S41425 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 32 to 44
280
Elastic (Young's, Tensile) Modulus, GPa 71
200
Elongation at Break, % 5.1 to 23
17
Fatigue Strength, MPa 46 to 88
450
Poisson's Ratio 0.33
0.28
Shear Modulus, GPa 27
77
Shear Strength, MPa 80 to 90
570
Tensile Strength: Ultimate (UTS), MPa 130 to 160
920
Tensile Strength: Yield (Proof), MPa 50 to 120
750

Thermal Properties

Latent Heat of Fusion, J/g 410
280
Maximum Temperature: Mechanical, °C 170
810
Melting Completion (Liquidus), °C 650
1450
Melting Onset (Solidus), °C 590
1410
Specific Heat Capacity, J/kg-K 890
470
Thermal Conductivity, W/m-K 170
16
Thermal Expansion, µm/m-K 23
10

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 42
2.3
Electrical Conductivity: Equal Weight (Specific), % IACS 140
2.7

Otherwise Unclassified Properties

Base Metal Price, % relative 9.5
13
Density, g/cm3 2.8
7.9
Embodied Carbon, kg CO2/kg material 8.1
2.9
Embodied Energy, MJ/kg 150
40
Embodied Water, L/kg 1160
120

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 7.4 to 23
150
Resilience: Unit (Modulus of Resilience), kJ/m3 18 to 110
1420
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 49
25
Strength to Weight: Axial, points 12 to 15
33
Strength to Weight: Bending, points 20 to 23
27
Thermal Diffusivity, mm2/s 67
4.4
Thermal Shock Resistance, points 5.5 to 6.7
33

Alloy Composition

Aluminum (Al), % 94.1 to 97.6
0
Carbon (C), % 0
0 to 0.050
Chromium (Cr), % 0.050 to 0.25
12 to 15
Cobalt (Co), % 0 to 0.050
0
Copper (Cu), % 0 to 0.2
0 to 0.3
Iron (Fe), % 0.4 to 1.0
74 to 81.9
Magnesium (Mg), % 0 to 0.2
0
Manganese (Mn), % 0.8 to 1.5
0.5 to 1.0
Molybdenum (Mo), % 0
1.5 to 2.0
Nickel (Ni), % 0.15 to 0.7
4.0 to 7.0
Nitrogen (N), % 0
0.060 to 0.12
Phosphorus (P), % 0
0 to 0.020
Silicon (Si), % 1.0 to 1.7
0 to 0.5
Sulfur (S), % 0
0 to 0.0050
Titanium (Ti), % 0 to 0.1
0
Zinc (Zn), % 0 to 0.1
0
Residuals, % 0 to 0.15
0