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4007 Aluminum vs. EN 1.4122 Stainless Steel

4007 aluminum belongs to the aluminum alloys classification, while EN 1.4122 stainless steel belongs to the iron alloys. There are 30 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 EN 1.4122 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 71
200
Elongation at Break, % 5.1 to 23
14
Fatigue Strength, MPa 46 to 88
260 to 360
Poisson's Ratio 0.33
0.28
Shear Modulus, GPa 27
77
Shear Strength, MPa 80 to 90
480 to 520
Tensile Strength: Ultimate (UTS), MPa 130 to 160
790 to 850
Tensile Strength: Yield (Proof), MPa 50 to 120
450 to 630

Thermal Properties

Latent Heat of Fusion, J/g 410
280
Maximum Temperature: Mechanical, °C 170
870
Melting Completion (Liquidus), °C 650
1440
Melting Onset (Solidus), °C 590
1400
Specific Heat Capacity, J/kg-K 890
480
Thermal Conductivity, W/m-K 170
15
Thermal Expansion, µm/m-K 23
10

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 42
2.2
Electrical Conductivity: Equal Weight (Specific), % IACS 140
2.5

Otherwise Unclassified Properties

Base Metal Price, % relative 9.5
9.5
Density, g/cm3 2.8
7.7
Embodied Carbon, kg CO2/kg material 8.1
2.4
Embodied Energy, MJ/kg 150
33
Embodied Water, L/kg 1160
120

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 7.4 to 23
93 to 110
Resilience: Unit (Modulus of Resilience), kJ/m3 18 to 110
520 to 1000
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 49
25
Strength to Weight: Axial, points 12 to 15
28 to 31
Strength to Weight: Bending, points 20 to 23
25 to 26
Thermal Diffusivity, mm2/s 67
4.0
Thermal Shock Resistance, points 5.5 to 6.7
28 to 30

Alloy Composition

Aluminum (Al), % 94.1 to 97.6
0
Carbon (C), % 0
0.33 to 0.45
Chromium (Cr), % 0.050 to 0.25
15.5 to 17.5
Cobalt (Co), % 0 to 0.050
0
Copper (Cu), % 0 to 0.2
0
Iron (Fe), % 0.4 to 1.0
77.2 to 83.4
Magnesium (Mg), % 0 to 0.2
0
Manganese (Mn), % 0.8 to 1.5
0 to 1.5
Molybdenum (Mo), % 0
0.8 to 1.3
Nickel (Ni), % 0.15 to 0.7
0 to 1.0
Phosphorus (P), % 0
0 to 0.040
Silicon (Si), % 1.0 to 1.7
0 to 1.0
Sulfur (S), % 0
0 to 0.015
Titanium (Ti), % 0 to 0.1
0
Zinc (Zn), % 0 to 0.1
0
Residuals, % 0 to 0.15
0

Comparable Variants