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7204 Aluminum vs. EN 1.4662 Stainless Steel

7204 aluminum belongs to the aluminum alloys classification, while EN 1.4662 stainless 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 7204 aluminum and the bottom bar is EN 1.4662 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 70
200
Elongation at Break, % 11 to 13
28
Fatigue Strength, MPa 110 to 130
430 to 450
Poisson's Ratio 0.33
0.27
Shear Modulus, GPa 26
79
Shear Strength, MPa 130 to 220
520 to 540
Tensile Strength: Ultimate (UTS), MPa 220 to 380
810 to 830
Tensile Strength: Yield (Proof), MPa 120 to 310
580 to 620

Thermal Properties

Latent Heat of Fusion, J/g 380
290
Maximum Temperature: Mechanical, °C 210
1090
Melting Completion (Liquidus), °C 640
1430
Melting Onset (Solidus), °C 520
1380
Specific Heat Capacity, J/kg-K 880
480
Thermal Conductivity, W/m-K 150
15
Thermal Expansion, µm/m-K 24
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 39
2.2
Electrical Conductivity: Equal Weight (Specific), % IACS 120
2.5

Otherwise Unclassified Properties

Base Metal Price, % relative 9.5
16
Density, g/cm3 2.9
7.7
Embodied Carbon, kg CO2/kg material 8.4
3.2
Embodied Energy, MJ/kg 150
45
Embodied Water, L/kg 1140
170

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 25 to 40
210
Resilience: Unit (Modulus of Resilience), kJ/m3 110 to 710
840 to 940
Stiffness to Weight: Axial, points 13
15
Stiffness to Weight: Bending, points 47
25
Strength to Weight: Axial, points 21 to 36
29 to 30
Strength to Weight: Bending, points 28 to 40
25
Thermal Diffusivity, mm2/s 58
3.9
Thermal Shock Resistance, points 9.4 to 16
22

Alloy Composition

Aluminum (Al), % 90.5 to 94.8
0
Carbon (C), % 0
0 to 0.030
Chromium (Cr), % 0 to 0.3
23 to 25
Copper (Cu), % 0 to 0.2
0.1 to 0.8
Iron (Fe), % 0 to 0.35
62.6 to 70.2
Magnesium (Mg), % 1.0 to 2.0
0
Manganese (Mn), % 0.2 to 0.7
2.5 to 4.0
Molybdenum (Mo), % 0
1.0 to 2.0
Nickel (Ni), % 0
3.0 to 4.5
Nitrogen (N), % 0
0.2 to 0.3
Phosphorus (P), % 0
0 to 0.035
Silicon (Si), % 0 to 0.3
0 to 0.7
Sulfur (S), % 0
0 to 0.0050
Titanium (Ti), % 0 to 0.2
0
Vanadium (V), % 0 to 0.1
0
Zinc (Zn), % 4.0 to 5.0
0
Zirconium (Zr), % 0 to 0.25
0
Residuals, % 0 to 0.15
0