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S45503 Stainless Steel vs. 2618 Aluminum

S45503 stainless steel belongs to the iron alloys classification, while 2618 aluminum belongs to the aluminum alloys. There are 26 material properties with values for both materials. Properties with values for just one material (9, 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 S45503 stainless steel and the bottom bar is 2618 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 410 to 500
120
Elastic (Young's, Tensile) Modulus, GPa 190
71
Elongation at Break, % 4.6 to 6.8
5.8
Fatigue Strength, MPa 710 to 800
110
Poisson's Ratio 0.28
0.33
Shear Modulus, GPa 75
27
Shear Strength, MPa 940 to 1070
260
Tensile Strength: Ultimate (UTS), MPa 1610 to 1850
420
Tensile Strength: Yield (Proof), MPa 1430 to 1700
350

Thermal Properties

Latent Heat of Fusion, J/g 270
390
Maximum Temperature: Mechanical, °C 760
210
Melting Completion (Liquidus), °C 1440
640
Melting Onset (Solidus), °C 1400
550
Specific Heat Capacity, J/kg-K 470
880
Thermal Expansion, µm/m-K 11
22

Otherwise Unclassified Properties

Base Metal Price, % relative 15
11
Density, g/cm3 7.9
2.9
Embodied Carbon, kg CO2/kg material 3.4
8.3
Embodied Energy, MJ/kg 48
150
Embodied Water, L/kg 120
1150

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 82 to 110
23
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 24
47
Strength to Weight: Axial, points 57 to 65
40
Strength to Weight: Bending, points 39 to 43
42
Thermal Shock Resistance, points 56 to 64
19

Alloy Composition

Aluminum (Al), % 0
92.4 to 94.9
Carbon (C), % 0 to 0.010
0
Chromium (Cr), % 11 to 12.5
0
Copper (Cu), % 1.5 to 2.5
1.9 to 2.7
Iron (Fe), % 72.4 to 78.9
0.9 to 1.3
Magnesium (Mg), % 0
1.3 to 1.8
Manganese (Mn), % 0 to 0.5
0
Molybdenum (Mo), % 0 to 0.5
0
Nickel (Ni), % 7.5 to 9.5
0.9 to 1.2
Niobium (Nb), % 0.1 to 0.5
0
Phosphorus (P), % 0 to 0.010
0
Silicon (Si), % 0 to 0.2
0.1 to 0.25
Sulfur (S), % 0 to 0.010
0
Titanium (Ti), % 1.0 to 1.4
0.040 to 0.1
Zinc (Zn), % 0
0 to 0.1
Residuals, % 0
0 to 0.15