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4007 Aluminum vs. AISI 422 Stainless Steel

4007 aluminum belongs to the aluminum alloys classification, while AISI 422 stainless steel belongs to the iron alloys. There are 31 material properties with values for both materials. Properties with values for just one material (4, 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 AISI 422 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 32 to 44
260 to 330
Elastic (Young's, Tensile) Modulus, GPa 71
200
Elongation at Break, % 5.1 to 23
15 to 17
Fatigue Strength, MPa 46 to 88
410 to 500
Poisson's Ratio 0.33
0.28
Shear Modulus, GPa 27
76
Shear Strength, MPa 80 to 90
560 to 660
Tensile Strength: Ultimate (UTS), MPa 130 to 160
910 to 1080
Tensile Strength: Yield (Proof), MPa 50 to 120
670 to 870

Thermal Properties

Latent Heat of Fusion, J/g 410
270
Maximum Temperature: Mechanical, °C 170
650
Melting Completion (Liquidus), °C 650
1480
Melting Onset (Solidus), °C 590
1470
Specific Heat Capacity, J/kg-K 890
470
Thermal Conductivity, W/m-K 170
24
Thermal Expansion, µm/m-K 23
10

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 42
4.7
Electrical Conductivity: Equal Weight (Specific), % IACS 140
5.3

Otherwise Unclassified Properties

Base Metal Price, % relative 9.5
11
Density, g/cm3 2.8
7.9
Embodied Carbon, kg CO2/kg material 8.1
3.1
Embodied Energy, MJ/kg 150
44
Embodied Water, L/kg 1160
100

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 7.4 to 23
140 to 150
Resilience: Unit (Modulus of Resilience), kJ/m3 18 to 110
1140 to 1910
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 49
25
Strength to Weight: Axial, points 12 to 15
32 to 38
Strength to Weight: Bending, points 20 to 23
26 to 30
Thermal Diffusivity, mm2/s 67
6.4
Thermal Shock Resistance, points 5.5 to 6.7
33 to 39

Alloy Composition

Aluminum (Al), % 94.1 to 97.6
0
Carbon (C), % 0
0.2 to 0.25
Chromium (Cr), % 0.050 to 0.25
11 to 12.5
Cobalt (Co), % 0 to 0.050
0
Copper (Cu), % 0 to 0.2
0
Iron (Fe), % 0.4 to 1.0
81.9 to 85.8
Magnesium (Mg), % 0 to 0.2
0
Manganese (Mn), % 0.8 to 1.5
0.5 to 1.0
Molybdenum (Mo), % 0
0.9 to 1.3
Nickel (Ni), % 0.15 to 0.7
0.5 to 1.0
Phosphorus (P), % 0
0 to 0.025
Silicon (Si), % 1.0 to 1.7
0 to 0.5
Sulfur (S), % 0
0 to 0.025
Titanium (Ti), % 0 to 0.1
0
Tungsten (W), % 0
0.9 to 1.3
Vanadium (V), % 0
0.2 to 0.3
Zinc (Zn), % 0 to 0.1
0
Residuals, % 0 to 0.15
0