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EN 1.4347 Stainless Steel vs. 328.0 Aluminum

EN 1.4347 stainless steel belongs to the iron alloys classification, while 328.0 aluminum belongs to the aluminum alloys. There are 29 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 EN 1.4347 stainless steel and the bottom bar is 328.0 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
72
Elongation at Break, % 23
1.6 to 2.1
Fatigue Strength, MPa 320
55 to 80
Poisson's Ratio 0.27
0.33
Shear Modulus, GPa 79
27
Tensile Strength: Ultimate (UTS), MPa 660
200 to 270
Tensile Strength: Yield (Proof), MPa 480
120 to 170

Thermal Properties

Latent Heat of Fusion, J/g 300
510
Maximum Temperature: Mechanical, °C 1100
180
Melting Completion (Liquidus), °C 1410
620
Melting Onset (Solidus), °C 1370
560
Specific Heat Capacity, J/kg-K 490
890
Thermal Conductivity, W/m-K 15
120
Thermal Expansion, µm/m-K 13
22

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.1
30
Electrical Conductivity: Equal Weight (Specific), % IACS 2.4
99

Otherwise Unclassified Properties

Base Metal Price, % relative 16
10
Density, g/cm3 7.7
2.7
Embodied Carbon, kg CO2/kg material 3.1
7.8
Embodied Energy, MJ/kg 44
140
Embodied Water, L/kg 170
1070

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 140
2.8 to 5.0
Resilience: Unit (Modulus of Resilience), kJ/m3 570
92 to 200
Stiffness to Weight: Axial, points 15
15
Stiffness to Weight: Bending, points 25
51
Strength to Weight: Axial, points 24
21 to 28
Strength to Weight: Bending, points 22
28 to 34
Thermal Diffusivity, mm2/s 4.0
50
Thermal Shock Resistance, points 19
9.2 to 12

Alloy Composition

Aluminum (Al), % 0
84.5 to 91.1
Carbon (C), % 0 to 0.050
0
Chromium (Cr), % 25 to 27
0 to 0.35
Copper (Cu), % 0
1.0 to 2.0
Iron (Fe), % 62.2 to 69.4
0 to 1.0
Magnesium (Mg), % 0
0.2 to 0.6
Manganese (Mn), % 0 to 1.5
0.2 to 0.6
Nickel (Ni), % 5.5 to 7.5
0 to 0.25
Nitrogen (N), % 0.1 to 0.2
0
Phosphorus (P), % 0 to 0.035
0
Silicon (Si), % 0 to 1.5
7.5 to 8.5
Sulfur (S), % 0 to 0.020
0
Titanium (Ti), % 0
0 to 0.25
Zinc (Zn), % 0
0 to 1.5
Residuals, % 0
0 to 0.5