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S21460 Stainless Steel vs. 2124 Aluminum

S21460 stainless steel belongs to the iron alloys classification, while 2124 aluminum belongs to the aluminum alloys. There are 26 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 S21460 stainless steel and the bottom bar is 2124 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
71
Elongation at Break, % 46
5.7
Fatigue Strength, MPa 390
130
Poisson's Ratio 0.28
0.33
Shear Modulus, GPa 77
27
Shear Strength, MPa 580
280
Tensile Strength: Ultimate (UTS), MPa 830
490
Tensile Strength: Yield (Proof), MPa 430
430

Thermal Properties

Latent Heat of Fusion, J/g 290
390
Maximum Temperature: Mechanical, °C 920
190
Melting Completion (Liquidus), °C 1380
640
Melting Onset (Solidus), °C 1330
500
Specific Heat Capacity, J/kg-K 480
880
Thermal Expansion, µm/m-K 18
23

Otherwise Unclassified Properties

Base Metal Price, % relative 14
10
Density, g/cm3 7.6
3.0
Embodied Carbon, kg CO2/kg material 3.0
8.2
Embodied Energy, MJ/kg 43
150
Embodied Water, L/kg 160
1150

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 320
27
Resilience: Unit (Modulus of Resilience), kJ/m3 460
1290
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 25
46
Strength to Weight: Axial, points 30
45
Strength to Weight: Bending, points 26
46
Thermal Shock Resistance, points 17
21

Alloy Composition

Aluminum (Al), % 0
91.3 to 94.7
Carbon (C), % 0 to 0.12
0
Chromium (Cr), % 17 to 19
0 to 0.1
Copper (Cu), % 0
3.8 to 4.9
Iron (Fe), % 57.3 to 63.7
0 to 0.3
Magnesium (Mg), % 0
1.2 to 1.8
Manganese (Mn), % 14 to 16
0.3 to 0.9
Nickel (Ni), % 5.0 to 6.0
0
Nitrogen (N), % 0.35 to 0.5
0
Phosphorus (P), % 0 to 0.060
0
Silicon (Si), % 0 to 1.0
0 to 0.2
Sulfur (S), % 0 to 0.030
0
Titanium (Ti), % 0
0 to 0.15
Zinc (Zn), % 0
0 to 0.25
Residuals, % 0
0 to 0.15