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5070 Aluminum vs. S44330 Stainless Steel

5070 aluminum belongs to the aluminum alloys classification, while S44330 stainless steel belongs to the iron alloys. There are 30 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 5070 aluminum and the bottom bar is S44330 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 68
200
Elongation at Break, % 20
25
Fatigue Strength, MPa 150
160
Poisson's Ratio 0.33
0.27
Shear Modulus, GPa 26
78
Shear Strength, MPa 190
280
Tensile Strength: Ultimate (UTS), MPa 300
440
Tensile Strength: Yield (Proof), MPa 140
230

Thermal Properties

Latent Heat of Fusion, J/g 390
290
Maximum Temperature: Mechanical, °C 190
990
Melting Completion (Liquidus), °C 640
1440
Melting Onset (Solidus), °C 550
1390
Specific Heat Capacity, J/kg-K 900
480
Thermal Conductivity, W/m-K 130
21
Thermal Expansion, µm/m-K 24
10

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 31
2.7
Electrical Conductivity: Equal Weight (Specific), % IACS 100
3.1

Otherwise Unclassified Properties

Base Metal Price, % relative 9.5
13
Density, g/cm3 2.7
7.7
Embodied Carbon, kg CO2/kg material 8.8
2.8
Embodied Energy, MJ/kg 150
40
Embodied Water, L/kg 1170
140

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 51
91
Resilience: Unit (Modulus of Resilience), kJ/m3 150
140
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 50
25
Strength to Weight: Axial, points 31
16
Strength to Weight: Bending, points 37
17
Thermal Diffusivity, mm2/s 53
5.7
Thermal Shock Resistance, points 14
16

Alloy Composition


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Aluminum (Al), % 92.4 to 95.7
0
Carbon (C), % 0
0 to 0.025
Chromium (Cr), % 0 to 0.3
20 to 23
Copper (Cu), % 0 to 0.25
0.3 to 0.8
Iron (Fe), % 0 to 0.4
72.5 to 79.7
Magnesium (Mg), % 3.5 to 4.5
0
Manganese (Mn), % 0.4 to 0.8
0 to 1.0
Niobium (Nb), % 0
0 to 0.8
Nitrogen (N), % 0
0 to 0.025
Phosphorus (P), % 0
0 to 0.040
Silicon (Si), % 0 to 0.25
0 to 1.0
Sulfur (S), % 0
0 to 0.030
Titanium (Ti), % 0 to 0.15
0 to 0.8
Zinc (Zn), % 0.4 to 0.8
0
Residuals, % 0 to 0.15
0