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204.0 Aluminum vs. EN 1.4439 Stainless Steel

204.0 aluminum belongs to the aluminum alloys classification, while EN 1.4439 stainless steel belongs to the iron alloys. There are 30 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 204.0 aluminum and the bottom bar is EN 1.4439 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 90 to 120
220
Elastic (Young's, Tensile) Modulus, GPa 71
200
Elongation at Break, % 5.7 to 7.8
40
Fatigue Strength, MPa 63 to 77
270
Poisson's Ratio 0.33
0.28
Shear Modulus, GPa 27
79
Tensile Strength: Ultimate (UTS), MPa 230 to 340
680
Tensile Strength: Yield (Proof), MPa 180 to 220
310

Thermal Properties

Latent Heat of Fusion, J/g 390
290
Maximum Temperature: Mechanical, °C 170
980
Melting Completion (Liquidus), °C 650
1460
Melting Onset (Solidus), °C 580
1410
Specific Heat Capacity, J/kg-K 880
470
Thermal Conductivity, W/m-K 120
14
Thermal Expansion, µm/m-K 19
16

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 29 to 34
2.0
Electrical Conductivity: Equal Weight (Specific), % IACS 87 to 100
2.3

Otherwise Unclassified Properties

Base Metal Price, % relative 11
22
Density, g/cm3 3.0
7.9
Embodied Carbon, kg CO2/kg material 8.0
4.5
Embodied Energy, MJ/kg 150
61
Embodied Water, L/kg 1150
160

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 12 to 23
220
Resilience: Unit (Modulus of Resilience), kJ/m3 220 to 350
240
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 46
25
Strength to Weight: Axial, points 21 to 31
24
Strength to Weight: Bending, points 28 to 36
22
Thermal Diffusivity, mm2/s 46
3.8
Thermal Shock Resistance, points 12 to 18
15

Alloy Composition

Aluminum (Al), % 93.4 to 95.5
0
Carbon (C), % 0
0 to 0.030
Chromium (Cr), % 0
16.5 to 18.5
Copper (Cu), % 4.2 to 5.0
0
Iron (Fe), % 0 to 0.35
58.7 to 66.9
Magnesium (Mg), % 0.15 to 0.35
0
Manganese (Mn), % 0 to 0.1
0 to 2.0
Molybdenum (Mo), % 0
4.0 to 5.0
Nickel (Ni), % 0 to 0.050
12.5 to 14.5
Nitrogen (N), % 0
0.12 to 0.22
Phosphorus (P), % 0
0 to 0.045
Silicon (Si), % 0 to 0.2
0 to 1.0
Sulfur (S), % 0
0 to 0.015
Tin (Sn), % 0 to 0.050
0
Titanium (Ti), % 0.15 to 0.3
0
Zinc (Zn), % 0 to 0.1
0
Residuals, % 0 to 0.15
0