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390.0 Aluminum vs. EN 1.4421 Stainless Steel

390.0 aluminum belongs to the aluminum alloys classification, while EN 1.4421 stainless steel belongs to the iron alloys. There are 29 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 390.0 aluminum and the bottom bar is EN 1.4421 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 75
200
Elongation at Break, % 1.0
11 to 17
Fatigue Strength, MPa 76 to 110
380 to 520
Poisson's Ratio 0.33
0.28
Shear Modulus, GPa 28
77
Tensile Strength: Ultimate (UTS), MPa 280 to 300
880 to 1100
Tensile Strength: Yield (Proof), MPa 240 to 270
620 to 950

Thermal Properties

Latent Heat of Fusion, J/g 640
280
Maximum Temperature: Mechanical, °C 170
870
Melting Completion (Liquidus), °C 650
1440
Melting Onset (Solidus), °C 560
1400
Specific Heat Capacity, J/kg-K 880
480
Thermal Conductivity, W/m-K 130
16
Thermal Expansion, µm/m-K 18
10

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 24 to 25
2.2
Electrical Conductivity: Equal Weight (Specific), % IACS 79 to 83
2.5

Otherwise Unclassified Properties

Base Metal Price, % relative 11
12
Density, g/cm3 2.7
7.8
Embodied Carbon, kg CO2/kg material 7.3
2.6
Embodied Energy, MJ/kg 130
36
Embodied Water, L/kg 950
130

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 2.7 to 2.9
120 to 140
Resilience: Unit (Modulus of Resilience), kJ/m3 380 to 470
960 to 2270
Stiffness to Weight: Axial, points 15
14
Stiffness to Weight: Bending, points 52
25
Strength to Weight: Axial, points 28 to 30
31 to 39
Strength to Weight: Bending, points 35 to 36
26 to 30
Thermal Diffusivity, mm2/s 56
4.4
Thermal Shock Resistance, points 14 to 15
31 to 39

Alloy Composition

Aluminum (Al), % 74.5 to 79.6
0
Carbon (C), % 0
0 to 0.060
Chromium (Cr), % 0
15.5 to 17.5
Copper (Cu), % 4.0 to 5.0
0
Iron (Fe), % 0 to 1.3
74.4 to 80.5
Magnesium (Mg), % 0.45 to 0.65
0
Manganese (Mn), % 0 to 0.1
0 to 1.0
Molybdenum (Mo), % 0
0 to 0.7
Nickel (Ni), % 0
4.0 to 5.5
Phosphorus (P), % 0
0 to 0.035
Silicon (Si), % 16 to 18
0 to 0.8
Sulfur (S), % 0
0 to 0.020
Titanium (Ti), % 0 to 0.2
0
Zinc (Zn), % 0 to 0.1
0
Residuals, % 0 to 0.2
0

Comparable Variants