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S20433 Stainless Steel vs. 7003 Aluminum

S20433 stainless steel belongs to the iron alloys classification, while 7003 aluminum belongs to the aluminum 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 S20433 stainless steel and the bottom bar is 7003 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
70
Elongation at Break, % 46
11
Fatigue Strength, MPa 250
130 to 150
Poisson's Ratio 0.28
0.32
Shear Modulus, GPa 76
26
Shear Strength, MPa 440
210 to 230
Tensile Strength: Ultimate (UTS), MPa 630
350 to 390
Tensile Strength: Yield (Proof), MPa 270
300 to 310

Thermal Properties

Latent Heat of Fusion, J/g 280
380
Maximum Temperature: Mechanical, °C 900
200
Melting Completion (Liquidus), °C 1400
630
Melting Onset (Solidus), °C 1360
510
Specific Heat Capacity, J/kg-K 480
870
Thermal Conductivity, W/m-K 15
150
Thermal Expansion, µm/m-K 17
24

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.4
36
Electrical Conductivity: Equal Weight (Specific), % IACS 2.8
110

Otherwise Unclassified Properties

Base Metal Price, % relative 13
9.5
Density, g/cm3 7.7
2.9
Embodied Carbon, kg CO2/kg material 2.7
8.1
Embodied Energy, MJ/kg 39
150
Embodied Water, L/kg 150
1140

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 230
37 to 41
Resilience: Unit (Modulus of Resilience), kJ/m3 180
630 to 710
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 25
47
Strength to Weight: Axial, points 23
33 to 37
Strength to Weight: Bending, points 21
37 to 40
Thermal Diffusivity, mm2/s 4.0
59
Thermal Shock Resistance, points 14
15 to 17

Alloy Composition

Aluminum (Al), % 0
90.6 to 94.5
Carbon (C), % 0 to 0.080
0
Chromium (Cr), % 17 to 18
0 to 0.2
Copper (Cu), % 1.5 to 3.5
0 to 0.2
Iron (Fe), % 64.1 to 72.4
0 to 0.35
Magnesium (Mg), % 0
0.5 to 1.0
Manganese (Mn), % 5.5 to 7.5
0 to 0.3
Nickel (Ni), % 3.5 to 5.5
0
Nitrogen (N), % 0.1 to 0.25
0
Phosphorus (P), % 0 to 0.045
0
Silicon (Si), % 0 to 1.0
0 to 0.3
Sulfur (S), % 0 to 0.030
0
Titanium (Ti), % 0
0 to 0.2
Zinc (Zn), % 0
5.0 to 6.5
Zirconium (Zr), % 0
0.050 to 0.25
Residuals, % 0
0 to 0.15