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S31277 Stainless Steel vs. 4015 Aluminum

S31277 stainless steel belongs to the iron alloys classification, while 4015 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 S31277 stainless steel and the bottom bar is 4015 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 210
70
Elongation at Break, % 45
1.1 to 23
Fatigue Strength, MPa 380
46 to 71
Poisson's Ratio 0.28
0.33
Shear Modulus, GPa 80
26
Shear Strength, MPa 600
82 to 120
Tensile Strength: Ultimate (UTS), MPa 860
130 to 220
Tensile Strength: Yield (Proof), MPa 410
50 to 200

Thermal Properties

Latent Heat of Fusion, J/g 310
420
Maximum Temperature: Mechanical, °C 1100
160
Melting Completion (Liquidus), °C 1460
640
Melting Onset (Solidus), °C 1410
600
Specific Heat Capacity, J/kg-K 460
900
Thermal Expansion, µm/m-K 16
23

Otherwise Unclassified Properties

Base Metal Price, % relative 36
9.5
Density, g/cm3 8.1
2.7
Embodied Carbon, kg CO2/kg material 6.7
8.1
Embodied Energy, MJ/kg 90
150
Embodied Water, L/kg 220
1160

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 320
2.4 to 24
Resilience: Unit (Modulus of Resilience), kJ/m3 410
18 to 290
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 24
50
Strength to Weight: Axial, points 29
13 to 22
Strength to Weight: Bending, points 25
21 to 30
Thermal Shock Resistance, points 19
5.7 to 9.7

Alloy Composition


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Aluminum (Al), % 0
94.9 to 97.9
Carbon (C), % 0 to 0.020
0
Chromium (Cr), % 20.5 to 23
0
Copper (Cu), % 0.5 to 1.5
0 to 0.2
Iron (Fe), % 35.5 to 46.2
0 to 0.7
Magnesium (Mg), % 0
0.1 to 0.5
Manganese (Mn), % 0 to 3.0
0.6 to 1.2
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
1.4 to 2.2
Sulfur (S), % 0 to 0.010
0
Zinc (Zn), % 0
0 to 0.2
Residuals, % 0
0 to 0.15