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EN 1.4470 Stainless Steel vs. 3303 Aluminum

EN 1.4470 stainless steel belongs to the iron alloys classification, while 3303 aluminum belongs to the aluminum 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 EN 1.4470 stainless steel and the bottom bar is 3303 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
70
Elongation at Break, % 23
23
Fatigue Strength, MPa 320
43
Poisson's Ratio 0.27
0.33
Shear Modulus, GPa 80
26
Tensile Strength: Ultimate (UTS), MPa 680
110
Tensile Strength: Yield (Proof), MPa 480
39

Thermal Properties

Latent Heat of Fusion, J/g 300
400
Maximum Temperature: Mechanical, °C 1060
180
Melting Completion (Liquidus), °C 1450
650
Melting Onset (Solidus), °C 1400
620
Specific Heat Capacity, J/kg-K 480
900
Thermal Conductivity, W/m-K 18
170
Thermal Expansion, µm/m-K 13
23

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.2
43
Electrical Conductivity: Equal Weight (Specific), % IACS 2.5
140

Otherwise Unclassified Properties

Base Metal Price, % relative 17
9.5
Density, g/cm3 7.8
2.8
Embodied Carbon, kg CO2/kg material 3.6
8.1
Embodied Energy, MJ/kg 49
150
Embodied Water, L/kg 160
1180

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 140
20
Resilience: Unit (Modulus of Resilience), kJ/m3 570
11
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
49
Strength to Weight: Axial, points 24
11
Strength to Weight: Bending, points 22
18
Thermal Diffusivity, mm2/s 4.8
67
Thermal Shock Resistance, points 18
4.8

Alloy Composition

Aluminum (Al), % 0
96.6 to 99
Carbon (C), % 0 to 0.030
0
Chromium (Cr), % 21 to 23
0
Copper (Cu), % 0
0.050 to 0.2
Iron (Fe), % 63.7 to 71.9
0 to 0.7
Manganese (Mn), % 0 to 2.0
1.0 to 1.5
Molybdenum (Mo), % 2.5 to 3.5
0
Nickel (Ni), % 4.5 to 6.5
0
Nitrogen (N), % 0.12 to 0.2
0
Phosphorus (P), % 0 to 0.035
0
Silicon (Si), % 0 to 1.0
0 to 0.6
Sulfur (S), % 0 to 0.025
0
Zinc (Zn), % 0
0 to 0.3
Residuals, % 0
0 to 0.15