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4343 Aluminum vs. S41425 Stainless Steel

4343 aluminum belongs to the aluminum alloys classification, while S41425 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 S41425 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 71
200
Elongation at Break, % 4.4
17
Fatigue Strength, MPa 45
450
Poisson's Ratio 0.33
0.28
Shear Modulus, GPa 27
77
Shear Strength, MPa 64
570
Tensile Strength: Ultimate (UTS), MPa 110
920
Tensile Strength: Yield (Proof), MPa 62
750

Thermal Properties

Latent Heat of Fusion, J/g 510
280
Maximum Temperature: Mechanical, °C 160
810
Melting Completion (Liquidus), °C 620
1450
Melting Onset (Solidus), °C 580
1410
Specific Heat Capacity, J/kg-K 900
470
Thermal Conductivity, W/m-K 180
16
Thermal Expansion, µm/m-K 22
10

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 44
2.3
Electrical Conductivity: Equal Weight (Specific), % IACS 150
2.7

Otherwise Unclassified Properties

Base Metal Price, % relative 9.5
13
Density, g/cm3 2.6
7.9
Embodied Carbon, kg CO2/kg material 7.9
2.9
Embodied Energy, MJ/kg 150
40
Embodied Water, L/kg 1100
120

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 4.1
150
Resilience: Unit (Modulus of Resilience), kJ/m3 27
1420
Stiffness to Weight: Axial, points 15
14
Stiffness to Weight: Bending, points 53
25
Strength to Weight: Axial, points 12
33
Strength to Weight: Bending, points 20
27
Thermal Diffusivity, mm2/s 77
4.4
Thermal Shock Resistance, points 5.2
33

Alloy Composition

Aluminum (Al), % 90.3 to 93.2
0
Carbon (C), % 0
0 to 0.050
Chromium (Cr), % 0
12 to 15
Copper (Cu), % 0 to 0.25
0 to 0.3
Iron (Fe), % 0 to 0.8
74 to 81.9
Manganese (Mn), % 0 to 0.1
0.5 to 1.0
Molybdenum (Mo), % 0
1.5 to 2.0
Nickel (Ni), % 0
4.0 to 7.0
Nitrogen (N), % 0
0.060 to 0.12
Phosphorus (P), % 0
0 to 0.020
Silicon (Si), % 6.8 to 8.2
0 to 0.5
Sulfur (S), % 0
0 to 0.0050
Zinc (Zn), % 0 to 0.2
0
Residuals, % 0 to 0.15
0