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EN 1.4669 Stainless Steel vs. EN AC-44000 Aluminum

EN 1.4669 stainless steel belongs to the iron alloys classification, while EN AC-44000 aluminum belongs to the aluminum 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 EN 1.4669 stainless steel and the bottom bar is EN AC-44000 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 260
51
Elastic (Young's, Tensile) Modulus, GPa 200
71
Elongation at Break, % 28
7.3
Fatigue Strength, MPa 330
64
Poisson's Ratio 0.27
0.33
Shear Modulus, GPa 78
27
Tensile Strength: Ultimate (UTS), MPa 780
180
Tensile Strength: Yield (Proof), MPa 450
86

Thermal Properties

Latent Heat of Fusion, J/g 290
560
Maximum Temperature: Mechanical, °C 1030
170
Melting Completion (Liquidus), °C 1420
590
Melting Onset (Solidus), °C 1370
590
Specific Heat Capacity, J/kg-K 480
910
Thermal Conductivity, W/m-K 15
140
Thermal Expansion, µm/m-K 13
21

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.2
36
Electrical Conductivity: Equal Weight (Specific), % IACS 2.5
130

Otherwise Unclassified Properties

Base Metal Price, % relative 13
9.5
Density, g/cm3 7.7
2.5
Embodied Carbon, kg CO2/kg material 2.6
7.8
Embodied Energy, MJ/kg 38
150
Embodied Water, L/kg 160
1070

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 190
11
Resilience: Unit (Modulus of Resilience), kJ/m3 510
51
Stiffness to Weight: Axial, points 14
16
Stiffness to Weight: Bending, points 25
55
Strength to Weight: Axial, points 28
20
Strength to Weight: Bending, points 24
28
Thermal Diffusivity, mm2/s 4.0
61
Thermal Shock Resistance, points 21
8.4

Alloy Composition

Aluminum (Al), % 0
87.1 to 90
Carbon (C), % 0 to 0.045
0
Chromium (Cr), % 21.5 to 24
0
Copper (Cu), % 1.6 to 3.0
0 to 0.050
Iron (Fe), % 65.2 to 74.8
0 to 0.19
Magnesium (Mg), % 0
0 to 0.45
Manganese (Mn), % 1.0 to 3.0
0 to 0.1
Molybdenum (Mo), % 0 to 0.5
0
Nickel (Ni), % 1.0 to 3.0
0
Nitrogen (N), % 0.12 to 0.2
0
Phosphorus (P), % 0 to 0.040
0
Silicon (Si), % 0 to 1.0
10 to 11.8
Sulfur (S), % 0 to 0.030
0
Titanium (Ti), % 0
0 to 0.15
Zinc (Zn), % 0
0 to 0.070
Residuals, % 0
0 to 0.1