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4343 Aluminum vs. EN 1.4029 Stainless Steel

4343 aluminum belongs to the aluminum alloys classification, while EN 1.4029 stainless steel belongs to the iron alloys. There are 30 material properties with values for both materials. Properties with values for just one material (3, 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 1.4029 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 71
190
Elongation at Break, % 4.4
10 to 20
Fatigue Strength, MPa 45
270 to 400
Poisson's Ratio 0.33
0.28
Shear Modulus, GPa 27
76
Shear Strength, MPa 64
440 to 550
Tensile Strength: Ultimate (UTS), MPa 110
700 to 930
Tensile Strength: Yield (Proof), MPa 62
410 to 740

Thermal Properties

Latent Heat of Fusion, J/g 510
270
Maximum Temperature: Mechanical, °C 160
750
Melting Completion (Liquidus), °C 620
1440
Melting Onset (Solidus), °C 580
1400
Specific Heat Capacity, J/kg-K 900
480
Thermal Conductivity, W/m-K 180
30
Thermal Expansion, µm/m-K 22
10

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 44
3.1
Electrical Conductivity: Equal Weight (Specific), % IACS 150
3.7

Otherwise Unclassified Properties

Base Metal Price, % relative 9.5
7.0
Density, g/cm3 2.6
7.7
Embodied Carbon, kg CO2/kg material 7.9
2.0
Embodied Energy, MJ/kg 150
28
Embodied Water, L/kg 1100
100

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 4.1
89 to 120
Resilience: Unit (Modulus of Resilience), kJ/m3 27
440 to 1410
Stiffness to Weight: Axial, points 15
14
Stiffness to Weight: Bending, points 53
25
Strength to Weight: Axial, points 12
25 to 33
Strength to Weight: Bending, points 20
23 to 27
Thermal Diffusivity, mm2/s 77
8.1
Thermal Shock Resistance, points 5.2
26 to 34

Alloy Composition

Aluminum (Al), % 90.3 to 93.2
0
Carbon (C), % 0
0.25 to 0.32
Chromium (Cr), % 0
12 to 13.5
Copper (Cu), % 0 to 0.25
0
Iron (Fe), % 0 to 0.8
82.8 to 87.6
Manganese (Mn), % 0 to 0.1
0 to 1.5
Molybdenum (Mo), % 0
0 to 0.6
Phosphorus (P), % 0
0 to 0.040
Silicon (Si), % 6.8 to 8.2
0 to 1.0
Sulfur (S), % 0
0.15 to 0.25
Zinc (Zn), % 0 to 0.2
0
Residuals, % 0 to 0.15
0