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S31277 Stainless Steel vs. 7003 Aluminum

S31277 stainless steel belongs to the iron alloys classification, while 7003 aluminum belongs to the aluminum alloys. There are 26 material properties with values for both materials. Properties with values for just one material (6, 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 S31277 stainless steel and the bottom bar is 7003 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 210
70
Elongation at Break, % 45
11
Fatigue Strength, MPa 380
130 to 150
Poisson's Ratio 0.28
0.32
Shear Modulus, GPa 80
26
Shear Strength, MPa 600
210 to 230
Tensile Strength: Ultimate (UTS), MPa 860
350 to 390
Tensile Strength: Yield (Proof), MPa 410
300 to 310

Thermal Properties

Latent Heat of Fusion, J/g 310
380
Maximum Temperature: Mechanical, °C 1100
200
Melting Completion (Liquidus), °C 1460
630
Melting Onset (Solidus), °C 1410
510
Specific Heat Capacity, J/kg-K 460
870
Thermal Expansion, µm/m-K 16
24

Otherwise Unclassified Properties

Base Metal Price, % relative 36
9.5
Density, g/cm3 8.1
2.9
Embodied Carbon, kg CO2/kg material 6.7
8.1
Embodied Energy, MJ/kg 90
150
Embodied Water, L/kg 220
1140

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 320
37 to 41
Resilience: Unit (Modulus of Resilience), kJ/m3 410
630 to 710
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 24
47
Strength to Weight: Axial, points 29
33 to 37
Strength to Weight: Bending, points 25
37 to 40
Thermal Shock Resistance, points 19
15 to 17

Alloy Composition


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Aluminum (Al), % 0
90.6 to 94.5
Carbon (C), % 0 to 0.020
0
Chromium (Cr), % 20.5 to 23
0 to 0.2
Copper (Cu), % 0.5 to 1.5
0 to 0.2
Iron (Fe), % 35.5 to 46.2
0 to 0.35
Magnesium (Mg), % 0
0.5 to 1.0
Manganese (Mn), % 0 to 3.0
0 to 0.3
Molybdenum (Mo), % 6.5 to 8.0
0
Nickel (Ni), % 26 to 28
0
Nitrogen (N), % 0.3 to 0.4
0
Phosphorus (P), % 0 to 0.030
0
Silicon (Si), % 0 to 0.5
0 to 0.3
Sulfur (S), % 0 to 0.010
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