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S44735 Stainless Steel vs. 5040 Aluminum

S44735 stainless steel belongs to the iron alloys classification, while 5040 aluminum belongs to the aluminum alloys. There are 27 material properties with values for both materials. Properties with values for just one material (7, 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 S44735 stainless steel and the bottom bar is 5040 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 220
66 to 74
Elastic (Young's, Tensile) Modulus, GPa 210
70
Elongation at Break, % 21
5.7 to 6.8
Fatigue Strength, MPa 300
100 to 130
Poisson's Ratio 0.27
0.33
Shear Modulus, GPa 82
26
Shear Strength, MPa 390
140 to 150
Tensile Strength: Ultimate (UTS), MPa 630
240 to 260
Tensile Strength: Yield (Proof), MPa 460
190 to 230

Thermal Properties

Latent Heat of Fusion, J/g 310
400
Maximum Temperature: Mechanical, °C 1100
190
Melting Completion (Liquidus), °C 1460
650
Melting Onset (Solidus), °C 1420
600
Specific Heat Capacity, J/kg-K 480
900
Thermal Expansion, µm/m-K 11
23

Otherwise Unclassified Properties

Base Metal Price, % relative 21
9.5
Density, g/cm3 7.7
2.8
Embodied Carbon, kg CO2/kg material 4.4
8.3
Embodied Energy, MJ/kg 61
150
Embodied Water, L/kg 180
1180

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 120
14 to 15
Resilience: Unit (Modulus of Resilience), kJ/m3 520
260 to 380
Stiffness to Weight: Axial, points 15
14
Stiffness to Weight: Bending, points 26
50
Strength to Weight: Axial, points 23
24 to 26
Strength to Weight: Bending, points 21
31 to 32
Thermal Shock Resistance, points 20
10 to 11

Alloy Composition

Aluminum (Al), % 0
95.2 to 98
Carbon (C), % 0 to 0.030
0
Chromium (Cr), % 28 to 30
0.1 to 0.3
Copper (Cu), % 0
0 to 0.25
Iron (Fe), % 60.7 to 68.4
0 to 0.7
Magnesium (Mg), % 0
1.0 to 1.5
Manganese (Mn), % 0 to 1.0
0.9 to 1.4
Molybdenum (Mo), % 3.6 to 4.2
0
Nickel (Ni), % 0 to 1.0
0
Niobium (Nb), % 0.2 to 1.0
0
Nitrogen (N), % 0 to 0.045
0
Phosphorus (P), % 0 to 0.040
0
Silicon (Si), % 0 to 1.0
0 to 0.3
Sulfur (S), % 0 to 0.030
0
Titanium (Ti), % 0.2 to 1.0
0
Zinc (Zn), % 0
0 to 0.25
Residuals, % 0
0 to 0.15