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328.0 Aluminum vs. EN 1.4557 Stainless Steel

328.0 aluminum belongs to the aluminum alloys classification, while EN 1.4557 stainless steel belongs to the iron alloys. There are 30 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 328.0 aluminum and the bottom bar is EN 1.4557 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 60 to 82
160
Elastic (Young's, Tensile) Modulus, GPa 72
200
Elongation at Break, % 1.6 to 2.1
40
Fatigue Strength, MPa 55 to 80
260
Poisson's Ratio 0.33
0.28
Shear Modulus, GPa 27
80
Tensile Strength: Ultimate (UTS), MPa 200 to 270
560
Tensile Strength: Yield (Proof), MPa 120 to 170
300

Thermal Properties

Latent Heat of Fusion, J/g 510
300
Maximum Temperature: Mechanical, °C 180
1090
Melting Completion (Liquidus), °C 620
1460
Melting Onset (Solidus), °C 560
1420
Specific Heat Capacity, J/kg-K 890
460
Thermal Conductivity, W/m-K 120
15
Thermal Expansion, µm/m-K 22
17

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 30
2.0
Electrical Conductivity: Equal Weight (Specific), % IACS 99
2.2

Otherwise Unclassified Properties

Base Metal Price, % relative 10
29
Density, g/cm3 2.7
8.0
Embodied Carbon, kg CO2/kg material 7.8
5.6
Embodied Energy, MJ/kg 140
76
Embodied Water, L/kg 1070
190

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 2.8 to 5.0
190
Resilience: Unit (Modulus of Resilience), kJ/m3 92 to 200
210
Stiffness to Weight: Axial, points 15
14
Stiffness to Weight: Bending, points 51
24
Strength to Weight: Axial, points 21 to 28
19
Strength to Weight: Bending, points 28 to 34
19
Thermal Diffusivity, mm2/s 50
4.0
Thermal Shock Resistance, points 9.2 to 12
12

Alloy Composition

Aluminum (Al), % 84.5 to 91.1
0
Carbon (C), % 0
0 to 0.020
Chromium (Cr), % 0 to 0.35
19.5 to 20.5
Copper (Cu), % 1.0 to 2.0
0.5 to 1.0
Iron (Fe), % 0 to 1.0
49.5 to 56.3
Magnesium (Mg), % 0.2 to 0.6
0
Manganese (Mn), % 0.2 to 0.6
0 to 1.2
Molybdenum (Mo), % 0
6.0 to 7.0
Nickel (Ni), % 0 to 0.25
17.5 to 19.5
Nitrogen (N), % 0
0.18 to 0.24
Phosphorus (P), % 0
0 to 0.030
Silicon (Si), % 7.5 to 8.5
0 to 1.0
Sulfur (S), % 0
0 to 0.010
Titanium (Ti), % 0 to 0.25
0
Zinc (Zn), % 0 to 1.5
0
Residuals, % 0 to 0.5
0