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4343 Aluminum vs. EN 1.4659 Stainless Steel

4343 aluminum belongs to the aluminum alloys classification, while EN 1.4659 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 4343 aluminum and the bottom bar is EN 1.4659 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 71
210
Elongation at Break, % 4.4
49
Fatigue Strength, MPa 45
460
Poisson's Ratio 0.33
0.28
Shear Modulus, GPa 27
81
Shear Strength, MPa 64
640
Tensile Strength: Ultimate (UTS), MPa 110
900
Tensile Strength: Yield (Proof), MPa 62
480

Thermal Properties

Latent Heat of Fusion, J/g 510
300
Maximum Temperature: Mechanical, °C 160
1100
Melting Completion (Liquidus), °C 620
1480
Melting Onset (Solidus), °C 580
1430
Specific Heat Capacity, J/kg-K 900
460
Thermal Conductivity, W/m-K 180
12
Thermal Expansion, µm/m-K 22
16

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 44
1.7
Electrical Conductivity: Equal Weight (Specific), % IACS 150
1.9

Otherwise Unclassified Properties

Base Metal Price, % relative 9.5
37
Density, g/cm3 2.6
8.2
Embodied Carbon, kg CO2/kg material 7.9
6.5
Embodied Energy, MJ/kg 150
89
Embodied Water, L/kg 1100
220

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 4.1
370
Resilience: Unit (Modulus of Resilience), kJ/m3 27
550
Stiffness to Weight: Axial, points 15
14
Stiffness to Weight: Bending, points 53
24
Strength to Weight: Axial, points 12
31
Strength to Weight: Bending, points 20
25
Thermal Diffusivity, mm2/s 77
3.2
Thermal Shock Resistance, points 5.2
19

Alloy Composition

Aluminum (Al), % 90.3 to 93.2
0
Carbon (C), % 0
0 to 0.020
Chromium (Cr), % 0
23 to 25
Copper (Cu), % 0 to 0.25
1.0 to 2.0
Iron (Fe), % 0 to 0.8
35.7 to 45.7
Manganese (Mn), % 0 to 0.1
2.0 to 4.0
Molybdenum (Mo), % 0
5.5 to 6.5
Nickel (Ni), % 0
21 to 23
Nitrogen (N), % 0
0.35 to 0.5
Phosphorus (P), % 0
0 to 0.030
Silicon (Si), % 6.8 to 8.2
0 to 0.7
Sulfur (S), % 0
0 to 0.010
Tungsten (W), % 0
1.5 to 2.5
Zinc (Zn), % 0 to 0.2
0
Residuals, % 0 to 0.15
0