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7204 Aluminum vs. EN 1.4588 Stainless Steel

7204 aluminum belongs to the aluminum alloys classification, while EN 1.4588 stainless steel belongs to the iron alloys. There are 29 material properties with values for both materials. Properties with values for just one material (5, 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 1.4588 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 70
200
Elongation at Break, % 11 to 13
34
Fatigue Strength, MPa 110 to 130
190
Poisson's Ratio 0.33
0.28
Shear Modulus, GPa 26
80
Tensile Strength: Ultimate (UTS), MPa 220 to 380
540
Tensile Strength: Yield (Proof), MPa 120 to 310
240

Thermal Properties

Latent Heat of Fusion, J/g 380
300
Maximum Temperature: Mechanical, °C 210
1100
Melting Completion (Liquidus), °C 640
1450
Melting Onset (Solidus), °C 520
1410
Specific Heat Capacity, J/kg-K 880
460
Thermal Conductivity, W/m-K 150
15
Thermal Expansion, µm/m-K 24
17

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 39
1.7
Electrical Conductivity: Equal Weight (Specific), % IACS 120
1.9

Otherwise Unclassified Properties

Base Metal Price, % relative 9.5
33
Density, g/cm3 2.9
8.1
Embodied Carbon, kg CO2/kg material 8.4
6.2
Embodied Energy, MJ/kg 150
84
Embodied Water, L/kg 1140
200

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 25 to 40
150
Resilience: Unit (Modulus of Resilience), kJ/m3 110 to 710
140
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 47
24
Strength to Weight: Axial, points 21 to 36
18
Strength to Weight: Bending, points 28 to 40
18
Thermal Diffusivity, mm2/s 58
4.0
Thermal Shock Resistance, points 9.4 to 16
11

Alloy Composition

Aluminum (Al), % 90.5 to 94.8
0
Carbon (C), % 0
0 to 0.020
Chromium (Cr), % 0 to 0.3
19 to 21
Copper (Cu), % 0 to 0.2
0.5 to 1.5
Iron (Fe), % 0 to 0.35
41.2 to 50.4
Magnesium (Mg), % 1.0 to 2.0
0
Manganese (Mn), % 0.2 to 0.7
0 to 2.0
Molybdenum (Mo), % 0
6.0 to 7.0
Nickel (Ni), % 0
24 to 26
Nitrogen (N), % 0
0.1 to 0.25
Phosphorus (P), % 0
0 to 0.035
Silicon (Si), % 0 to 0.3
0 to 1.0
Sulfur (S), % 0
0 to 0.020
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